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ISL54400, ISL54401, ISL54402
Data Sheet April 4, 2006 FN6240.1
Low Voltage, Dual SPDT, USB/Audio Switches with Negative Signal Capability
The Intersil ISL54400, ISL54401, ISL54402 dual SPDT (Single Pole/Double Throw) switches combine low distortion audio and accurate USB 2.0 Full Speed data signal switching in the same low voltage device. When operated with a 2.5V to 3.6V single supply these analog switches allow audio signal swings below-ground, allowing the use of a common USB and audio headphone connector in Personal Media Players and other portable battery powered devices. The ISL54400 and ISL54401 incorporate circuitry for detection of the USB VBUS voltage, which is used to switch between the audio and USB signal source in the portable device. In addition, the ISL54400 includes circuitry for generation of a VTERM voltage of 3.3V for use with USB speed setting pull-up resistor. The ISL54400, ISL54401, ISL54402 are available in 10 Ld 3mm x 3mm TDFN and 10 Ld tiny 2.1mm x 1.6mm ultra-thin QFN packages. They operate over a temperature range of -40 to +85C.
Features
* Low Distortion Negative Signal Capability * Detection of VBUS Voltage on USB Cable (ISL54400 and ISL54401) * Generation of VTERM Voltage for USB D+/D- Pull-up Resistor (ISL54400) * Low Distortion Headphone Audio Signals - THD+N at 12mW into 32 Load . . . . . . . . . . . . <0.01% * Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB * 1.8V Logic Compatible (ISL54402) * Single Supply Operation (VDD) - ISL54400 and ISL54401 . . . . . . . . . . . . . . 2.5V to 3.6V - ISL54402 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V * Available in Ultra-thin QFN and TDFN Packages * Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
* MP3 and other Personal Media Players * Cellular/Mobile Phones * PDA's * USB Switching * Audio/USB Switching
Related Literature
* Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)" * Application Note AN557 "Recommended Test Procedures for Analog Switches"
Application Block Diagram
VDD VTERM
ISL54400
USB/HEADPHONE JACK VBUS USB FULL-SPEED TRANSCEIVER
D-/L
DD+ L R
D+/R
CODEC
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL54400, ISL54401, ISL54402 Pinouts
(Note 1) ISL54400 (TDFN, TQFN) TOP VIEW
VTERM VDD VBUS D-/L D +/R GND 1 2 3 4 5 Power/Logic Control 10 9 8 7 6 VTERM VDD DVBUS D+ D-/L L D+/R R 4 5 GND 6 R 3 7 L 2 1 10 Power/Logic Control 9 8 DD+
ISL54401 (TDFN, TQFN) TOP VIEW
N.C. VDD VBUS D-/L D+/R GND 1 2 3 4 5 Power/Logic Control 10 9 8 7 6 N.C. VDD DVBUS D+ D-/L L D+/R R 4 5 GND 6 3 7 L R 2 1 10 Power/Logic Control 9 8 DD+
ISL54402 (TDFN, TQFN) TOP VIEW
IN1 VDD IN2 1 2 3 4 5 Logic Control 10 9 8 7 6 IN1 VDD NO1 NO2 NC1 NC2 IN2 COM1 COM2 1 2 3 4 5 GND 10 Logic Control 9 8 7 6 NO1 NO2 NC1 NC2 COM1 COM2 GND
NOTE: 1. ISL54400, ISL54401 Switches Shown for VBUS not present (or idle). ISL54402 Switches Shown for Logic "0" Input.
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FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Truth Table
ISL54401 VBUS 0 1 L, R ON OFF D+, DOFF ON
Logic "0" when VDD + 0.2V, Logic "1" when VDD + 0.8V
Truth Table
ISL54400 VDD 0 0 1 1 VBUS 0 1 0 1 L, R ON OFF ON OFF D+, DOFF ON OFF ON VTERM Open Open Open 3.0V to 3.6V
VDD: Logic "0" when < 2.4V, Logic "1" when 2.5V VBUS: Logic "0" when VDD + 0.2V, Logic "1" when VDD + 0.8V
Truth Table
ISL54402 IN 0 1 NCx ON OFF NOx OFF ON
Logic "0" 0.5V. Logic "1" 1.4V, with VDD between 2.7V and 3.6V
Pin Descriptions
ISL54400 NO. 1 2 3 4 5 6 7 8 9 10 NAME VDD VBUS D-/L D+/R GND R L D+ DVTERM FUNCTION Power Supply (Audio Switches) Control Input for VTERM Digital Control Input Power Supply (USB Switches) Voice and Data Common Pin Voice and Data Common Pin Ground Connection Audio Right Input Audio Left Input USB Differential Input USB Differential Input USB VTERM Voltage, Outputs 3.3V when VBUS and VDD = logic "1" and connected to Upstream USB Termination. NAME VDD VBUS D-/L D+/R GND R L D+ DN.C. ISL54401 FUNCTION Power Supply (Audio Switches) Digital Control Input Power Supply (USB Switches) Voice and Data Common Pin Voice and Data Common Pin Ground Connection Audio Right Input Audio Left Input USB Differential Input USB Differential Input No Connect NAME VDD IN2 COM1 COM2 GND NC2 NC1 NO2 NO1 IN1 ISL54402 FUNCTION System Power Supply Input Digital Control Input Common Pin Common Pin Ground Connection Normally Closed Pin Normallly Closed Pin Normally Open Pin Normallly Open Pin Digital Control Input
3
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Ordering Information
PART NUMBER (Note) ISL54400IRZ ISL54400IRZ-T ISL54401IRZ ISL54401IRZ-T ISL54402IRZ ISL54402IRZ-T ISL54400IRUZ ISL54400IRUZ-T ISL54401IRUZ ISL54401IRUZ-T ISL54402IRUZ ISL54402IRUZ-T BRAND 400Z 400Z 401Z 401Z 402Z 402Z FA FA FB FB FC FC TEMP. RANGE (C) -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 10 Ld 3x3 thin DFN 10 Ld 3x3 thin DFN Tape and Reel 10 Ld 3x3 thin DFN 10 Ld 3x3 thin DFN Tape and Reel 10 Ld 3x3 thin DFN 10 Ld 3x3 thin DFN Tape and Reel 10 Ld 2.1 x 1.6mm TQFN 10 Ld 2.1 x 1.6mm TQFN Tape and Reel 10 Ld 2.1 x 1.6mm TQFN 10 Ld 2.1 x 1.6mm TQFN Tape and Reel 10 Ld 2.1 x 1.6mm TQFN 10 Ld 2.1 x 1.6mm TQFN Tape and Reel PACKAGE (Pb-Free) PKG. DWG. # L10.3x3A L10.3x3A L10.3x3A L10.3x3A L10.3x3A L10.3x3A L10.2.1x1.6A L10.2.1x1.6A L10.2.1x1.6A L10.2.1x1.6A L10.2.1x1.6A L10.2.1x1.6A
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
4
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402
Absolute Maximum Ratings
VDD to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V VBUS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V Input Voltages NOx, NCx, L, R (Note 2). . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V) D+, D- (Note 2). . . . . . . . . . . . . . . . . . . . . -2V to ((VBUS) + 0.3V) IN (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((VDD) + 0.3V) Output Voltages (ISL54400 and ISL54401) D-/L, D+/R (Note 2) Audio Mode . . . . . . . . -2V to ((VDD) + 0.3V) D-/L, D+/R (Note 2) USB Mode . . . . . . . . -2V to ((VBUS) + 0.3V) Output Voltages (ISL54402) COMx (Note 2) . . . . . . . . . . . . . . . . . . . . . . -2V to ((VDD) + 0.3V) Continuous Current (L, R, NCx, or COMx) . . . . . . . . . . . . . 300mA Peak Current (L, R, NCx, or COMx) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . 500mA Continuous Current (D+, D-, NOx). . . . . . . . . . . . . . . . . . . . . 40mA Peak Current (D+, D-, NOx) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . 100mA ESD Rating: HBM COMx, D-/L, D+/R, VBUS . . . . . . . . . . . . . . . . . . . . . . .>4kV HBM All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>4kV MM COMx, D-/L, D+/R, VBUS . . . . . . . . . . . . . . . . . . . . . . .>500V MM All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>300V CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1kV
Thermal Information
Thermal Resistance (Typical, Note 3) JA (C/W) 10 Ld 3x3 TDFN Package . . . . . . . . . . . . . . . . . . . . 110 10 Ld QFN Package . . . . . . . . . . . . . . . . . . . . . . . 96 Maximum Junction Temperature (Plastic Package). . . . . . . . 150C Maximum Storage Temperature Range . . . . . . . . . . . . . -65C to 150C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300C (Lead Tips Only)
Operating Conditions
Temperature Range ISL5440XIR and ISL5440XIRU . . . . . . . . . . . . . . . . . -40C to 85C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES: 2. Signals on NC, NO, IN, or COM exceeding VDD or GND are clamped by internal diodes. Limit forward diode current to maximum current ratings. 3. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications - 2.7V to 5.5V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
VINH = 1.4V, VINL = 0.5V (Notes 4, 6), Unless Otherwise Specified TEMP (C) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Audio Switches (L, R, NC1, NC2) Analog Signal Range, VANALOG
TEST CONDITIONS
Full 25 Full 25 Full 25
-1.5 -
0.02 0.03 50
1.5 0.12 0.15 0.08 0.095 -
V k
RON Matching Between Channels, VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, ICOM = 40mA, VL RON or VR or VNCx = Voltage at max RON over signal range of -0.85V to 0.85V, (Note 9) RON Flatness, RFLAT(ON) VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, ICOM = 40mA, VL or VR or VNCx = -0.85V to 0.85V, (Note 7) VDD = 3.6V, VBUS = 0V or VIN = 0.5V, VD-/L or VD+/R or VCOM = -0.85V, 0.85V, VL or VR or VNCx = -0.85V, 0.85V, VD+ and VD- = floating, Measure current through the discharge pull down resistor and calculate resistance value.
Discharge Pull Down Resistance, RL, RR, RCOM
USB Switches (D+, D-, NO1, NO2) Analog Signal Range, VANALOG ON Resistance, RON VDD = 3.6V, VBUS = 4.4V or VIN = 1.4V, ICOM = 40mA, VD+ or VD- or VNOx = 0V to VBUS, (See Figure 3) Full 25 Full 25 Full -1.5 5.5 0.2 VBUS 6 6.5 0.4 0.45 V
RON Matching Between Channels, VDD = 3.6V, VBUS = 4.4V or VIN = 1.4V, ICOM = 40mA, RON VD+ or VD- or VNOx = Voltage at max RON, (Note 9)
5
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402
Electrical Specifications - 2.7V to 5.5V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
TEMP (C) 25 Full 25 Full 25 Full (NOTE 5) MIN -5 -15 -30 -35 VINH = 1.4V, VINL = 0.5V (Notes 4, 6), Unless Otherwise Specified (Continued) TYP 1.0 10 (NOTE 5) MAX UNITS 1.9 2.5 5 15 30 35 A A A A
PARAMETER RON Flatness, RFLAT(ON)
TEST CONDITIONS VDD = 3.6V, VBUS = 4.4V or VIN = 1.4V, ICOM = 40mA, VD+ or VD- or VNOx = 0V to VBUS, (Note 7)
OFF Leakage Current, ID+(OFF) or VDD = 3.6V, VBUS = 0V or VIN = 0.5V, VD-/L or VD+/R or ID-(OFF), INOx(OFF) VCOM = 1.5V, 0V, VD+ or VD- or VNOx = 0V, 1.5V, VL and VR = floating ON Leakage Current, ION VDD = 3.6V, VBUS = 5.25V or VIN = 1.4V, VD-/L or VD+/R or VCOM = 0.3V, 3.6V, VD+ or VD- or VNOx = 0.3V, 3.6V, VL and VR = floating
DYNAMIC CHARACTERISTICS Turn-ON Time, tON
(ISL54402 Only)
VDD = 2.7V, VNO or VNC = 1.5V, RL = 300, CL = 35pF, (See Figure 1) VDD = 2.7V, VNO or VNC = 1.5V, RL = 300, CL = 35pF, (See Figure 1)
25 Full 25 Full Full 25 25 25 25 25
-
40 60 20 40 8 0.15 10 1.6 0.9 -110
-
ns ns ns ns ns ns % ns ns dB
Turn-OFF Time, tOFF
(ISL54402 Only)
Break-Before-Make Time Delay, tD VDD = 3.3V, VNO or VNC = 1.5V, RL = 300, CL = 35pF, (See Figure 2) (ISL54402 Only) Skew, tSKEW Rise/Fall Time Mismatch, tM Total Jitter, tJ Propagation Delay, tPD VDD = 3.0V, VBUS = 3.8V, RL = 39, CL = 50pF, tR = tF = 12ns at 12Mbps, (Duty Cycle = 50%) (See Figure 7) VDD = 3.0V, VBUS = 3.8V, RL = 39, CL = 50pF, tR = tF = 12ns at 12Mbps, (Duty Cycle = 50%), (See Figure 6) VDD =3.0V, VBUS = 3.8V, RL = 39, CL = 50pF, tR = tF = 12ns at 12Mbps VDD = 3.0V, VBUS = 3.8V, RL = 39, CL = 50pF, (See Figure 7)
RL = 32, f = 20Hz to 20kHz, VR or VL = 1.75VP-P, Crosstalk (Channel-to-Channel), R to D-/L, L to D+/R, NC2 to COM1, (See Figure 4) NC1 to COM2 Total Harmonic Distortion f = 20Hz to 20kHz, VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, VL or VR or VNCx = 0.60VRMS, RL = 32
25 25 25 25 25 25
-
0.01 394 239 10 13 46
-
% MHz MHz pF pF pF
Audio (NC) Switch -3dB Bandwidth Signal = 8dBm, RL = 50, CL = 5pF USB (NO) Switch -3dB Bandwidth Signal = 18dBm, 1Vdc offset, RL = 50, CL = 5pF D+/D- OFF Capacitance, CD+OFF, f = 1MHz, VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, VNO CD-OFF, CNOxOFF or VNC = VCOM = 0V, (See Figure 5) L/R OFF Capacitance, CLOFF, CROFF, CNCxOFF f = 1MHz, VDD = 3.0V, VBUS = 3.8V or VIN = 1.4V, VNO or VNC = VCOM = 0V, (See Figure 5)
COM ON Capacitance, CD-/L(ON), f = 1MHz, VDD = 3.0V, VBUS = 3.8V or VIN = 1.4V, VNO CD+/R(ON), CCOMx(ON) or VNC = VCOM = 0V, (See Figure 5) POWER SUPPLY CHARACTERISTICS Power Supply Range, VDD (ISL54400/01 only) Power Supply Range, VDD (ISL54402 Only) Positive Supply Current, IDD Audio Mode (ISL54400/01 only) VDD = 3.6V, VBUS = Float
Full Full 25 Full
2.5 1.8 4.5 -
3.6 5.5 8 10
V V A A
6
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402
Electrical Specifications - 2.7V to 5.5V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
TEMP (C) 25 Full VDD = 5.5V, VIN = 0V 25 Full VDD = 5.5V, VIN = 5.5V 25 Full VDD = 5.5V, VIN = 2.85V 25 Full VDD = 2.5V, VBUS = 4.4V, RTERM = 16.5k to Ground VDD = 2.0V, VBUS = 4.4V 25 25 (NOTE 5) MIN 3.0V 0V VINH = 1.4V, VINL = 0.5V (Notes 4, 6), Unless Otherwise Specified (Continued) TYP 3.5 (NOTE 5) MAX UNITS 8 25 11 15 0.06 1 8 10 3.6V 0.5V A A A A A A A A V V
PARAMETER Positive Supply Current, IBUS USB Mode (ISL54400/01 only) Positive Supply Current, IDD (ISL54402 Only) Positive Supply Current, IDD (ISL54402 Only) Positive Supply Current, IDD (ISL54402 Only) VTERM Voltage, VVTERM (ISL54400 Only) VTERM Voltage, VVTERM (ISL54400 Only)
TEST CONDITIONS VDD = 3.6V, VBUS = 5.25V
DIGITAL INPUT CHARACTERISTICS VBUS Voltage Low, VBUSL (ISL54400/01 Only) VBUS Voltage High, VBUSH (ISL54400/01 Only) Input Voltage Low, VINL (ISL54402 Only) Input Voltage High, VINH (ISL54402 Only) Input Voltage Low, VINL (ISL54402 Only) Input Voltage High, VINH (ISL54402 Only) Input Current, IINH, IINL (ISL54402 Only) NOTES: 4. VIN = input voltage to perform proper function. 5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 6. Parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. 7. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range. 8. Guaranteed by design. 9. RON matching between channels is calculated by subtracting the channel with the highest max Ron value from the channel with lowest max Ron value, between L and R, between NC1 and NC2 or between D+ and D-, or between NO1 and NO2. VDD = 2.7V to 3.6V VDD = 2.7V to 3.6V VDD = 5.0V VDD = 5.0V VDD = 5.5V, VIN = 0V or VDD Full Full Full Full Full Full Full VDD + 0.8 1.4 2.3 0.1 VDD + 0.2 0.5 0.8 V V V V V V A
7
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Test Circuits and Waveforms
VINH LOGIC INPUT 50% VINL tOFF SWITCH INPUT VNO 90% SWITCH OUTPUT 0V tON VOUT 90% CONTROL INPUT SWITCH INPUT NO or NC COM IN GND RL 300 CL 35pF VOUT tr < 20ns tf < 20ns VDD C
Logic input waveform is inverted for switches that have the opposite logic sense.
Repeat test for all switches. CL includes fixture and stray capacitance. RL V OUT = V (NO or NC) -----------------------------R L + R ( ON ) FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS FIGURE 1. SWITCHING TIMES
VDD
C
VINH LOGIC INPUT VINL
VNX
NO
COM
NC
VOUT RL 300 CL 35pF
IN LOGIC INPUT GND
SWITCH OUTPUT VOUT
90% 0V tD
Repeat test for all switches. CL includes fixture and stray capacitance. FIGURE 2B. TEST CIRCUIT
FIGURE 2A. MEASUREMENT POINTS FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD C RON = V1/100mA
NO or NC
VDD C
SIGNAL GENERATOR
L or R or NC
COM
32
VNX 100mA V1 IN VINL or VINH 0V or VDD
IN1
COM
ANALYZER GND RL
COM
R or L or NC
GND
N.C.
Repeat test for all switches. FIGURE 3. RON TEST CIRCUIT
Signal direction through switch is reversed, worst case values are recorded. Repeat test for all switches. FIGURE 4. CROSSTALK TEST CIRCUIT
8
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Test Circuits and Waveforms (Continued)
VDD C 1.3V< VCM < 2V
NO or NC
OUT+ VCM IN IMPEDANCE ANALYZER
COM
90% 10% tR
90% 10% tF
VINL or VINH
OUT-
GND tM = | tR -tF |
Repeat test for all switches.
FIGURE 5. CAPACITANCE TEST CIRCUIT
min (tR or tF)
FIGURE 6. RISE/FALL TIME MISMATCH TEST
tri 90% DIN+ DIN90% 50% 10% tfi tro 90% 10% OUT+ OUT90% tf0 DINRS 10% 50% tskew_i RS DIN+
VDD
C
D+/R
D+
OUT+ CL
D-/L
D-
OUTCL
GND 50% tskew_o 50% 10% |tskew_i| Change in Skew through the Switch for Input Signals. |tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals. |tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals. |tskew_0| Change in Skew through the Switch for Output Signals.
FIGURE 7A. MEASUREMENT POINTS FIGURE 7. SKEW TEST
FIGURE 7B. TEST CIRCUIT
9
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Application Block Diagram
VDD VTERM
ISL54400
USB/HEADPHONE JACK VBUS USB FULL-SPEED TRANSCEIVER
D-/L
DD+ L R
D+/R
CODEC
GND
Detailed Description
The ISL5440X family of devices are dual single pole/double throw (SPDT) analog switches that operate from a single power supply. They were designed to function as dual 2 to 1 multiplexers to select between USB differential data signals and audio L and R stereo signals. They come in tiny TQFN package for use in MP3 players, PDAs, cellphones, and other personal media players. All devices in this family consist of two 1 normally closed (NC) audio switches and two 5 normally open (NO) USB switches. The audio switches can accept signals that swing below ground. They were designed to pass audio left and right stereo signals, that are ground referenced, with minimal distortion. The USB switches were designed to pass fullspeed USB differential data signals with minimal edge and phase distortion. The ISL54400 and ISL54401 were specifically designed for MP3 players, personal media players and cellphone applications that need to combine the audio headphone jack and the USB data connector into a single shared connector, thereby saving space and component cost. A typical application block diagram of this functionality is shown above. The ISL54400 and ISL54401 incorporate circuitry for the detection of the USB VBUS voltage, which is used to switch between the audio CODEC drivers and USB transceiver of the MP3 player or cellphone. The ISL54400 contains additional circuitry to generate the required USB VTERM of 3.3V for use with the USB speed setting pull-up resistor. The ISL54402 is an audio/data switch and its functionality is typical of a standard dual SPDT device. A detailed description of the two types of switches and of each part type in the ISL5440x family are provided in the sections below. The USB transmission and audio playback are intended to be mutally exclusive operations. 10
Audio Switches
The two NC (normally closed) audio switches (L, R, NCx) are 1 switches that can pass signals that swing below ground. Crosstalk between the audio switches is < -110dB and has a -3dB bandwidth of 394MHz. The recommended maximum signal range is from -1.5V to 1.5V. You can apply positive signals greater than 1.5V but the RON resistance of the switch increases rapidly above 1.5V. The audio signal should not be allowed to exceed the VDD rail or swing more negative than -1.5V. Over a signal range of 1V these switches have an extremely low RON flatness. They can pass ground referenced audio signals with very low distortion (<0.01% THD+N) when delivering 12mW into a 32 headphone speaker load. See Figures 8 and 9 THD+N performance curves. These switches are uni-directional switches. The audio sources should be connected at the NC side of the switch (pins 7 and 8) and the speaker loads should be connected at the COM side of the switch (pins 3 and 4). For the ISL54400 and ISL54401 parts the audio switches are active (turned ON) whenever the VBUS voltage is to VDD + 0.2V. The VBUS pin is internally pulled low through a pulldown resistor allowing the VBUS pin to float. When the VBUS pin is floating the audio switches are ON. Note: Whenever the audio switches are ON the USB transceivers need to be in the high impedance state or static high or low state to keep from interfering with the audio transmission. For the ISL54402 part the NC1 audio switch is active (turned ON) whenever logic pin IN1 (pin 10) is LOW. The NC2 audio switch is active (turned ON) whenever the logic pin IN2 (pin 2) is LOW. Unlike the ISL54400 and ISL54401 parts
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402
were the two SPDT switches work in tandem, the ISL54402 gives you independent control over each SPDT switch. plugged into the common connector, nothing gets connected at the VBUS pin (its floating) and the ISL54400/01 part remains in the audio mode and the MP3 player or cellphone audio drivers can drive the headphones and play music. If VBUS (pin 2) voltage is greater than VDD by 0.8V the part will go into USB mode. In USB mode the D- and D+ 5 switches are ON and the L and R 1 audio switches are OFF (high impedance). In this state the part will be powered by the voltage connected at the VBUS pin (pin 2). When a USB cable from a computer or USB hub is connected at the common connector the VBUS voltage is driven to between 4.4V and 5.25V. The ISL54400/01 part will go into the USB mode. In USB mode the computer or USB hub transceiver and the MP3 player or cellphone USB transceiver are connected and digital data will be able to be transmit back and forth. When the USB cable is disconnected the switch automatically turns the D+ and D- switches OFF and turns the L and R audio switches ON. POWER In audio mode the power supply connected at VDD (pin 1) provides power to the ISL54400 and ISL54401 parts. Its voltage should be kept in the range of 2.5V to 3.6V when used in a USB / Audio application to ensure you get proper switching when the VBUS voltage is at its lower limit of 4.4V. In USB mode power for the ISL54400 and ISL54401 parts is provided from the VBUS line from the host USB controller of the computer or USB hub. Its voltage will be between 4.4V and 5.25V. VTERM OPERATION (ISL54400 ONLY) When VDD 2.5V and VBUS VDD + 0.8V, the VTERM pin (pin 10) will output an open circuit voltage equal to the voltage at the VBUS pin. Otherwise the VTERM pin will be in a HI-Z state. The VTERM circuitry has an internal series resistor that has been sized to output a voltage in the range of 3.0V to 3.6V when connected to one of the USB differential lines through the upstream USB termination resistance, when the VBUS voltage is in the range of 4.4V to 5.25V and the voltage at the VDD pin > 2.5V. The VTERM voltage range of 3.0V to 3.6V is a requirement of the USB specification. When a USB cable from a computer is connected to a USB device the VTERM voltage must be applied to a speed indicating pullup resistor to properly terminate the bus and facilitate digital transmission. When the cable is removed from the device the VTERM voltage must be disconnected from the speed indicating pullup resistor. The ISL54400 device can perform this operation.
USB Switches
The two NO (normally open) USB switches (D+, D-, NOx) are 5 bidirectional switches that are designed to pass low speed and full-speed USB differential signals typically in the range of 0V to 3.6V. The switches have low capacitance and high bandwidth to pass USB full-speed signals (12Mbps) with minimum edge and phase distortion to meet USB 2.0 signal quality specifications. For the ISL54400 and ISL54401 parts the maximum signal range for the USB switches is from -1.5V to VBUS. The signal voltage should not be allow to exceed the VBUS voltage rail or go below ground by more than -1.5V. For the ISL54402 part the maximum signal range is from 1.5V to VDD. The signal voltage should not be allowed to exceed the VDD voltage rail or go below ground by more than -1.5V. When using the ISL54400 and ISL54401 parts the USB switches are active (turned ON) whenever the VBUS voltage is to VDD + 0.8V. VBUS is internally pulled low, so when VBUS is floating the USB switches are OFF. Note: Whenever the USB switches are ON the audio drivers of the CODEC need to be at ac or dc ground or floating to keep from interfering with the data transmission. When using the ISL54402 part the NO1 USB switch is active (turned ON) whenever logic pin IN1 (pin 10) is HIGH. The NO2 USB switch is active (turned ON) whenever the logic pin IN2 (pin 2) is HIGH. Unlike the ISL54400 and ISL54401 parts were the two SPDT switches work in tandem, the ISL54402 gives you independent control over each SPDT switch.
ISL54400 and ISL54401 Operation
The ISL54400 and ISL54401 function the same except the ISL54401 does not have the VTERM feature. The discussion that follows pertains to both devices and will discuss using the parts in the typical application shown in the block diagram on page 10. LOGIC CONTROL The state of the ISL54400 and ISL54401 devices are determined by the voltage at the VBUS pin (pin 2). The VBUS pin is internally pulled low and can be left floating. If VBUS (pin 2) is floating or the VBUS voltage VDD + 0.2V the part will be in the Audio mode. In Audio mode the L (left) and R (right) 1 audio switches are ON and the D- and D+ 5 switches are OFF (high impedance). In this state power to the part will be provided by the DC voltage connected at the VDD pin (pin 1). In a typical application VDD will be in the range of 2.5V to 3.6V and will be connected to the battery or LDO of the MP3 player or cellphone. When a headphone is
11
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402
ISL54402 Operation
The ISL54402 is an audio/data switch. Its logic control is typical of a standard dual SPDT switch. The digital control for the ISL54402 are the IN pins (pin 2 and pin 10). These pins are 1.8V logic compatible when operated with a 3.0V supply. The device has been designed to have low IDD current even when the logic voltage is not at the rail. With VDD = 5.5V and VIN = 2.85V the ISL54402 draws only 8A current. When logic pin IN1 (pin 10) is LOW the NC1 audio switch is ON and the NO1 USB data switch is OFF. When logic pin IN1 (pin 10) is HIGH the NC1 audio switch is OFF and the NO1 USB data switch is ON. When logic pin IN2 (pin 2) is LOW the NC2 audio switch is ON and the NO2 USB data switch is OFF. When logic pin IN2 (pin 2) is HIGH the NC2 audio switch is OFF and the NO2 USB data switch is ON. Power for the ISL54402 device is always provided by the DC voltage source connected at the VDD pin (pin 1). The VDD power supply voltage range is from 1.8V to 5.5V.
Typical Performance Curves TA = 25C, Unless Otherwise Specified
0.015 RLOAD = 32 VLOAD = 0.6VRMS 10 RL = 32 FREQ = 1kHz 1 0.01 THD+N (%) THD+N (%) VDD = 2.5V 0.1
0.005 0.01
VDD = 3V
0 20
0.001 200 2000 FREQUENCY (Hz) 20000 0 10 20 30 40 50 60 70 OUTPUT POWER(mV)
FIGURE 8. THD+N vs FREQUENCY
FIGURE 9. THD+N vs POWER
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND (TDFN Paddle Connection: Tie to GND or Float)
NORMALIZED GAIN (dB)
TRANSISTOR COUNT:
1 GAIN 0 -1 USB -2 -3 -4 RL = 50 VIN = 0.2VP-P to 2VP-P 1 10 100 FREQUENCY (MHz) 1000 AUDIO
98 PROCESS: Submicron CMOS
FIGURE 10. FREQUENCY RESPONSE
12
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN)
D A B
L10.2.1x1.6A
10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL MIN 0.45 NOMINAL 0.55 0.127 to 0.15 REF 0.15 2.05 1.55 0.20 2.10 1.60 0.50 BSC 0.20 0.35 0.40 10 4 1 0 12 0.45 0.25 2.15 1.65 MAX 0.60 0.05 NOTES 5, 9 9 2 3 3 4 Rev. 1 1/06 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd and Ne refer to the number of terminals on D and E side, respectively. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip.
6 INDEX AREA 2X 2X 0.10 C
N
E
1 0.10 C
2
A A1
TOP VIEW
A3 b
0.10 C 0.05 C SEATING PLANE A A1
C
D E e k L
SIDE VIEW (DATUM A) PIN #1 ID 1 2 NX L N (DATUM B) N-1 e 3 (ND-1) X e BOTTOM VIEW C L NX (b) 5 SECTION "C-C" CC e TERMINAL TIP (A1) 9L NX b 5 4xk
N Nd Ne
0.10 M C A B 0.05 M C
6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 7. Maximum package warpage is 0.05mm. 8. Maximum allowable burrs is 0.076mm in all directions. 9. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 10. Same as JEDEC MO-255UABD except: No lead-pull-back, "A" MIN dimension = 0.45 not 0.50mm "L" MAX dimension = 0.45 not 0.42mm.
FOR ODD TERMINAL/SIDE b
0.05 MIN
L
0.10 MIN DETAIL "A" PIN 1 ID
13
FN6240.1 April 4, 2006
ISL54400, ISL54401, ISL54402 Thin Dual Flat No-Lead Plastic Package (TDFN)
2X A 0.15 C A D 2X 0.15 C B
L10.3x3A
10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL A
E
MIN 0.70 -
NOMINAL 0.75 0.20 REF
MAX 0.80 0.05
NOTES -
A1 A3 b D
6 INDEX AREA TOP VIEW B
0.20 2.95 2.25 2.95 1.45
0.25 3.0 2.30 3.0 1.50 0.50 BSC
0.30 3.05 2.35 3.05 1.55
5, 8 7, 8 7, 8 -
D2 E
// 0.10 C 0.08 C
E2 e k L N
A C SEATING PLANE SIDE VIEW A3
0.25 0.25
0.30 10 5
0.35
8 2 3 Rev. 2 1/06
D2 (DATUM B) 6 INDEX AREA (DATUM A) 1 2 D2/2
7
8
Nd NOTES:
1. Dimensioning and tolerancing conform to ASME Y14.5-1994.
NX k E2 E2/2
2. N is the number of terminals. 3. Nd refers to the number of terminals on D. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature.
NX L N 8 N-1 NX b 5 0.10 M C A B
e (Nd-1)Xe REF. BOTTOM VIEW C L
7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Compliant to JEDEC MO-229-WEED-3 except for D2 dimensions.
NX (b) 5
(A1) L1 e CC TERMINAL TIP 9L
SECTION "C-C"
FOR ODD TERMINAL/SIDE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 14
FN6240.1 April 4, 2006

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