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19-3171; Rev 0; 2/04
15kV ESD-Protected USB Transceivers in UCSP with USB Detect
General Description
The MAX3344E/MAX3345E USB transceivers convert logic-level signals to USB signals, and USB signals to logic-level signals. An internal 1.5k USB pullup resistor supports full-speed (12Mbps) USB operation. The MAX3344E/MAX3345E provide built-in 15kV ESD-protection circuitry on the USB I/O pins, D+ and D-, and VCC. The MAX3344E/MAX3345E operate with logic supply voltages as low as 1.65V, ensuring compatibility with low-voltage ASICs. The suspend mode lowers supply current to less than 40A. An enumerate function allows devices to logically disconnect while plugged in. The MAX3344E/MAX3345E are fully compliant with USB specification 1.1, and full-speed operation under USB specification 2.0. The MAX3344E/MAX3345E have a USB detect that monitors the USB bus for insertion and signals this event. The MAX3344E USB_DET threshold is between 3.6V (min) and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max). The MAX3344E/MAX3345E are available in the miniature 4 4 UCSPTM, as well as the small 16-pin TSSOP, and are specified over the extended temperature range, -40C to +85C.
Features
15kV ESD Protection On D+ and DComply with USB Specification 1.1 (Full Speed 2.0) Separate VP and VM Inputs/Outputs VL Down to 1.65V Allows Connection with LowVoltage ASICs Enumerate Input--Allows USB Connection through Software USB Detect Function 3.6V (min) to 4V (max)--MAX3344E 1V (min) to 2.8V (max)--MAX3345E Allow Single-Ended or Differential Logic I/O Internal Linear Regulator Allows Direct Powering from the USB Internal Pullup Resistor for Full-Speed Operation Three-State Outputs No Power-Supply Sequencing Required Driver Active in Suspend Mode Available in Miniature Chip-Scale Package
MAX3344E/MAX3345E

Ordering Information
PART MAX3344EEUE MAX3344EEBE-T MAX3345EEUE MAX3345EEBE-T TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 16 TSSOP 4 x 4 UCSP 16 TSSOP 4 x 4 UCSP
Applications
Cell Phones PC Peripherals Information Appliances Data Cradles PDAs MP3 Players Digital Cameras
Pin Configurations appear at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
1F VBUS 23.7 23.7 DVTRM 1F USB INTERFACE CONNECTOR D+ DGND
SYSTEM SUPPLY VOLTAGE
0.1F
SYSTEM INTERFACE
VL RCV MAX3344E/ MAX3345E VPI VMI SUSP OE USB_DET MODE ENUM VPO VMO GND
VCC D+
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
ABSOLUTE MAXIMUM RATINGS
(All voltages refer to GND, unless otherwise noted.) Supply Voltage (VCC) ...............................................-0.3V to +6V Output of Internal Regulator (VTRM) ..........-0.3V to (VCC + 0.3V) Input Voltage (D+, D-) ..............................................-0.3V to +6V System Supply Voltage (VL) .....................................-0.3V to +6V RCV, SUSP, VMO, MODE, VPO, OE, VMI, VPI, USB_DET, ENUM...............................-0.3V to (VL + 0.3V) Short-Circuit Current (D+, D-) to VCC or GND (Note 1) .........................................................Continuous Note 1: External 23.7 resistors connected to D+ and D-.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Maximum Continuous Current (all other pins) ..................15mA Continuous Power Dissipation (TA = +70C) 16-Pin TSSOP (derate 9.4mW/C above +70C)...754mW (U16-2) 4 4 UCSP (derate 8.2mW/C above +70C) ...659mW (B16-1) Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Bump Temperature (soldering) Reflow............................+235C
ELECTRICAL CHARACTERISTICS
(VCC = 4V to 5.5V bypassed with 1F to GND, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Note 2)
PARAMETER SUPPLY INPUTS (VCC, VTRM, VL) Regulated Supply Voltage Output VCC Input Range VL Input Range Operating VCC Supply Current Operating VL Supply Current Full-Speed Idle and SE0 Supply Current Static VL Supply Current Suspend Supply Current Disable-Mode Supply Current D+/D- Disable-Mode Load Current Sharing-Mode VL Supply Current D+/D- Sharing-Mode Load Current LOGIC-SIDE I/O Input High Voltage Input Low Voltage Output-Voltage High Output-Voltage Low VIH VIL VOH VOL SUSP, MODE, ENUM, OE, VMO, VPO SUSP, MODE, ENUM, OE, VMO, VPO VPI, VMI, RCV, USB_DET; ISOURCE = 2mA VPI, VMI, RCV, USB_DET; ISINK = -2mA 2/3 x VL 0.4 VL - 0.4 0.4 V V V V VVTRM VCC VL IVCC IVL IVCC(IDLE) IVL(STATIC) IVCC(SUSP) IVCC(DIS) ID_(DIS) IVL(SHARING) ID_(SHARING) Full-speed transmitting/receiving at 12Mbps, CL = 50pF on D+ and DFull-speed transmitting/receiving at 12Mbps Full-speed idle: VD+ > 2.7V, VD- < 0.3V SE0: VD+ < 0.3V, VD- < 0.3V Full-speed idle, SE0, or suspend mode SUSP = OE = high VL = GND or open VL = GND or open, VD_ = 0 or +5.5V VCC = GND or open, OE = low, SUSP = high VCC = GND or open, VD_ = 0 or +5.5V 340 390 Internal regulator 3.0 4.0 1.65 3.3 3.6 5.5 3.60 10 8 450 500 12.5 40 20 5 20 20 V V V mA mA A A A A A A A SYMBOL CONDITIONS MIN TYP MAX UNITS
2
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 4V to 5.5V bypassed with 1F to GND, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Note 2)
PARAMETER Input Leakage Current USB-SIDE I/O Output-Voltage Low Output-Voltage High Input Impedance Single-Ended Input-Voltage High Single-Ended Input-Voltage Low Receiver Single-Ended Hysteresis Differential Input Sensitivity Input Common-Mode Voltage Range Driver Output Impedance Internal Pullup Resistor VOL VOH ZIN VIH VIL VHYS VDIFF VCM ROUT RPU VUSBLH1 USB_DET Threshold VUSBHL1 VUSBLH2 VUSBHL2 USB_DET Hysteresis LINEAR REGULATOR External Capacitor ESD PROTECTION (VCC, D+, D-) Human Body Model IEC1000-4-2 Air-Gap Discharge IEC1000-4-2 Contact Discharge 15 10 8 kV kV kV COUT Compensation of linear regulator 1 F VUSBHYS MAX3344E MAX3344E MAX3345E MAX3345E MAX3344E 1 25 mV 3.6 2.8 200 0.8 4.6 1.410 1.500 2.5 16.0 1.540 4.0 V 200 RL = 1.5k from D+ or D- to 3.6V RL = 15k from D+ and D- to GND Three-state driver, ENUM = 0, VD_ = 0 or +3.6V 2.8 1 2.0 0.8 0.3 3.6 V V M V V mV mV V k SYMBOL CONDITIONS SUSP, MODE, ENUM, OE, VMO, VPO = 0 or VL MIN TYP MAX 1 UNITS A
MAX3344E/MAX3345E
TIMING CHARACTERISTICS
(VCC = 4V to 5.5V, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Figures 2-6) (Note 2)
PARAMETER TRANSMITTER OE to Transmit Delay Enable Time OE to Driver Three-State Delay Driver Disable Time VPO/VMO to D+/D- Propagation Delay VPO/VMO D+/D- Propagation Delay tPZD tPDZ tPLH1(drv) tPHL1(drv) tPLH0(drv) tPHL0(drv) Figures 2 and 6c Figures 2 and 6c MODE = high, Figures 4 and 6b MODE = high, Figures 4 and 6b MODE = low, Figures 3 and 6c MODE = low, Figures 3 and 6c 10 10 11 11 20 20 18 18 20 20 ns ns ns ns SYMBOL CONDITIONS MIN TYP MAX UNITS
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
TIMING CHARACTERISTICS (continued)
(VCC = 4V to 5.5V, GND = 0, VL = 1.65V to 3.6V, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Figures 2-6) (Note 2)
PARAMETER Rise Time D+/DFall Time D+/DRise- and Fall-Time Matching Output Signal Crossover SYMBOL tR1 tF1 tR1/tF1 VCRS tPLH(RCV) CONDITIONS CL = 50pF, 10% to 90% of |VOH - VOL| CL = 50pF, 90% to 10% of |VOH - VOL| (Note 3) (Note 3) MIN 4 4 90 1.3 TYP MAX 20 20 111 2.0 18 18 18 18 UNITS ns ns % V ns ns ns ns
DIFFERENTIAL RECEIVER (Figures 5 and 6a) D+/D- to RCV Propagation Delay tPHL(RCV) SINGLE-ENDED RECEIVERS (Figures 5 and 6a) tPLH(SE) D+/D- to VPI or VMI Propagation Delay tPHL(SE)
Note 2: Parameters are 100% production tested at 25C, limits over temperature are guaranteed by design. Note 3: Guaranteed by design, not production tested.
Typical Operating Characteristics
(VCC = 5V, VL = 3.3V, TA = +25C, unless otherwise noted.)
DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VL
MAX3344E/45E toc01
DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VCC
MAX3344E/45E toc02
SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VL
14 PROPAGATION DELAY (ns) 13 12 11 10 9 8 TA = -40C 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 TA = +25C TA = +85C
MAX3344E/45E toc03
20 TA = +85C PROPAGATION DELAY (ns) 18
20 TA = +85C
15
PROPAGATION DELAY (ns)
18
16 TA = +25C 14 TA = -40C 12
16 TA = +25C
14
12
TA = -40C
10 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 VL (V)
10 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50
7 VL (V)
4
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Typical Operating Characteristics (continued)
(VCC = 5V, VL = 3.3V, TA = +25C, unless otherwise noted.)
SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VCC
MAX3344E/45E toc04
TRANSMITTER SKEW vs. VCC
1.8 TRANSMITTER SKEW (ns) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 TA = +25C TA = +85C 4 3 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50 1.5 TA = -40C
MAX3344E/45E toc05
LOGIC CURRENT CONSUMPTION IN SUSPEND MODE
MAX3344E/45E toc06
15 14 PROPAGATION DELAY (ns) 13 12 11 TA = +25C 10 9 8 7 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 TA = -40C TA = +85C
2.0
10 9 8 IVL (A) 7 6 5
5.50
1.8
2.1
2.4
2.7
3.0
3.3
3.6
VL (V)
VCC CURRENT CONSUMPTION IN SUSPEND MODE
MAX3344E/45E toc07
VTRM vs. VCC
MAX3344E/45E toc08
RISE- AND FALL-TIME MATCHING
MAX3344E/45E toc09
32 31 30 29 IVCC (A) 28 27 26 25 24 23 22 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25
3.5
f = 6MHz
3.4
D+ 1V/div D-
VTRM (V)
3.3
3.2
3.1 IVTRM = 15mA 3.0 5.50 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50 20ns/div
SUSPEND RESPONSE
MAX3344E/45E toc10
TRANSMISSION IN SUSPEND MODE (SUSP = 1)
MAX3344E/45E toc11
USB_DET RESPONSE
MAX3344E/45E toc12
VPO SUSP 0 VMO 2V/div 2V/div RCV 0 D+
D-
VCC 2V/div 0 USB_DET 0
100ns/div
2s/div
10s/div
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Pin Description
PIN TSSOP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 UCSP D2 D1 C2 C1 B1 B2 A1 A2 B3 A3 A4 B4 C4 D4 D3 NAME RCV VPO MODE VMO OE SUSP VPI VMI ENUM VCC GND DD+ VTRM VL INPUT/ OUTPUT Output Input Input Input Input Input Output Output Input Power Power Input/ Output Input/ Output Power Power FUNCTION Receiver Output. Single-ended CMOS output. RCV responds to the differential input on D+ and D-. Logic-Level Data Input. VPO is level translated to D+. Mode-Control Input. Selects differential (mode 1) or single-ended (mode 0) input for the system side when converting logic-level signals to USB level signals. Force MODE high to select mode 1. Force MODE low to select mode 0. Logic-Level Data Input. VMO is level translated to D-. Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or to receive data. Suspend Input. Drive SUSP low for normal operation. Drive SUSP high for low-power state. In low-power state, RCV is low and VPI/VMI are active. Logic-Level Data Output. VPI is the level-translated value of D+. Logic-Level Data Output. VMI is the level-translated value of D-. Enumerate. Drive ENUM high to connect the internal 1.5k resistor from D+ to 3.3V. Drive ENUM low to disconnect the internal 1.5k resistor. USB-Side Power-Supply Input. Connect VCC to the incoming USB power supply. Bypass VCC to GND with a 1F ceramic capacitor. Ground Negative USB Differential Data Input/Output. Connect to the USB's D- signal through a 23.7 1% resistor. Positive USB Differential Data Input/Output. Connect to the USB's D+ signal through a 23.7 1% resistor. Regulated Output Voltage. VTRM provides a 3.3V output derived from VCC. Bypass VTRM to GND with a 1F (min) low-ESR capacitor, such as ceramic or plastic film types. System-Side Power-Supply Input. Connect to the system's logic-level power supply, 1.65V to 3.6V. USB Detector Output. A high at USB_DET signals to the ASIC that VCC is present. A low at USB_DET indicates that VCC is not present. The MAX3344E USB_DET threshold is between 3.6V (min) and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max).
16
C3
USB_DET
Output
Detailed Description
The MAX3344E/MAX3345E are bidirectional transceivers that convert single-ended or differential logic-level signals to differential USB signals, and convert differential USB signals to single-ended or differential logic-level signals. The MAX3344E/MAX3345E are operational from VCC = 5.5V to VCC = 3V (electrical specifications are not guaranteed for VCC < 4V). Both devices include an internal 1.5k pullup resistor that connects and disconnects D+ to VTRM (see the Functional Diagram). The MAX3344E/MAX3345E are tolerant to power sequencing with either VCC > VL or VL > VCC. Additionally,
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the USB I/O, D+ and D-, and VCC are ESD protected to 15kV. The MAX3344E/MAX3345E can receive USB power (V CC) directly from the USB connection and operate with logic supplies (VL) down to 1.65V, while still meeting the USB physical layer specifications. The MAX3344E/MAX3345E support full-speed (12Mbps) USB specification 2.0 operation. The MAX3344E/MAX3345E have an enumerate feature that functions when power is applied. Driving ENUM low disconnects the internal 1.5k pullup resistor from D+ enumerating the USB. This is useful if changes in communication protocol are required while power is applied, and while the USB cable is connected.
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect
Power-Supply Configurations
Normal Operating Mode Connect VL and VCC to system power supplies (Table 1). Connect VL to a +1.65V to +3.6V supply. Connect V CC to a +4.0V to +5.5V supply. Alternatively, the MAX3344E/MAX3345E can derive power from a single Li+ battery. Connect the battery to VCC. VVTRM remains above +3.0V for VCC as low as +3.1V. Additionally, the MAX3344E/MAX3345E can derive power from a 3.3V 10% voltage regulator. Connect VCC and VTRM to an external +3.3V voltage regulator. Disable Mode Connect VCC to a system power supply and leave VL unconnected or connect to GND. D+ and D- enter a tristate mode and VCC consumes less than 20A of supply current. D+ and D- withstand external signals up to +5.5V in disable mode (Table 2). Sharing Mode Connect VL to a system power supply and leave VCC (or VCC and VTRM) unconnected or connect to GND. D+ and D- enter a tri-state mode, allowing other circuitry to share the USB D+ and D- lines, and VL consumes less than 20A of supply current. D+ and D- withstand external signals up to +5.5V in sharing mode (Table 2).
Device Control
D+ and DD+ and D- are the USB-side transmitter I/O connections, and are ESD protected to 15kV using the Human Body Model, 10kV using IEC 1000-4-2 AirGap Discharge, and 8kV using IEC 1000-4-2 Contact Discharge, making the MAX3344E/MAX3345E ideal for applications where a robust transmitter is required. A 23.7 resistor is required on D+ and D- for normal operation (see the External Resistors section). ENUM USB specification 2.0 requires a 1.5k pullup resistor on D+ for full-speed (12Mbps) operation. Controlled by enumerate (ENUM), the MAX3344E/MAX3345E provide this internal 1.5k resistor. Drive ENUM high to connect the pullup resistor from D+ to VTRM. Drive ENUM low to disconnect the pullup resistor from D+ to VTRM. VPO/VMO, VPI/VMI, and OE The MAX3344E/MAX3345E system-side inputs are VPO and VMO. Data comes into the MAX3344E/MAX3345E through VPO and VMO. VPO and VMO operate either differentially with VPO as the positive terminal and VMO as the negative terminal, or single ended with VPO as the data input (see the MODE section).
MAX3344E/MAX3345E
Table 1. Power-Supply Configurations
VCC (V) +4.0 to +5.5 +3.1 to +4.5 +3.0 to +3.6 GND or floating +3.0 to +5.5 VTRM (V) +3.3 Output +3.3 Output +3.0 to +3.6 Input Output Output VL (V) +1.65 to +3.6 +1.65 to +3.6 +1.65 to +3.6 +1.65 to +3.6 GND or floating CONFIGURATION Normal mode Battery supply Voltage regulator supply Sharing mode Disable mode NOTES -- -- -- Table 2 Table 2
Table 2. Disable-Mode and Sharing-Mode Configurations
INPUTS/OUTPUTS VCC/VTRM VL D+ and DVPI and VMI RCV SPEED, SUSP, OE, ENUM * * * DISABLE MODE +5V input/+3.3V output +3.3V input/+3.3V input +3.7V input/+3.3V output * * * SHARING MODE Floating or connected to GND < +3.6V (MAX3344E) < +1.0V (MAX3345E)
Floating or connected to GND High impedance Invalid* Invalid* High impedance
+1.65V to +3.6V input High impedance High impedance for OE = Low High for OE = High Undefined** High impedance
*High Impedance or low. **High or low. _______________________________________________________________________________________ 7
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
The MAX3344E/MAX3345E system-side outputs are VPI, VMI, and RCV. The MAX3344E/MAX3345E send data through VPI, VMI, and RCV. VPI and VMI are outputs to the single-ended receivers and RCV is the output of the differential receiver. Output enable (OE) controls data transmission. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or receive data. MODE MODE is a control input that selects whether differential or single-ended logic signals are recognized by the system side of the MAX3344E/MAX3345E. Drive MODE high to select differential mode with VPO as the positive terminal and VMO as the negative terminal. Drive MODE low to select single-ended mode with VPO as the data input (Table 3). VTRM VTRM is the 3.3V output of the internal linear voltage regulator. VTRM powers the internal circuitry of the USB side of the MAX3344E/MAX3345E. Connect a 1F (min) low-ESR ceramic or plastic capacitor from VTRM to GND, as close to VTRM as possible. Do not use VTRM to power external circuitry. VCC Bypass VCC to GND with a 1F ceramic capacitor as close to the device as possible. If VCC drops below the USB detect threshold, supply current drops below 20A avoiding excessive VCC current consumption, and D+/D- enter a high-impedance state allowing other devices to drive the lines. USB Detect USB detect output (USB_DET) signals that VCC is present. A high at USB_DET indicates that VCC is present, while a low at USB_DET indicates that VCC is not present. The MAX3344E USB_DET threshold is between 3.6V (min) and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max). SUSP Suspend (SUSP) is a control input. Force SUSP high to place the MAX3344E/MAX3345E in a low-power state. In this state, the quiescent supply current into VCC is less than 40A and RCV goes low. In suspend mode, VPI and VMI remain active as receive outputs and VTRM stays on. The MAX3344E/ MAX3345E continue to receive data from the USB, allowing the P to sense activity on the D+/D- lines and wake up the MAX3344E/MAX3345E. The MAX3344E/MAX3345E can also transmit data to D+ and D- while in suspend mode. This function is
8 Figure 1c. IEC 1000-4-2 ESD Test Model
RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
Cs 100pF
STORAGE CAPACITOR
Figure 1a. Human Body ESD Test Models
IP 100% 90% AMPERES 36.8% 10% 0 0 tRL TIME
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
tDL CURRENT WAVEFORM
Figure 1b. Human Body Model Current Waveform
RC 50M TO 100M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
Cs 150pF
STORAGE CAPACITOR
used to signal a remote wake-up by driving a signal on D+ and D- for a period of 1ms to 15ms. In suspend mode, data can only be transmitted with full-speed slope control.
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect
VL OE 0V tPZD tPDZ VL/2
Data Transfer
Receiving Data from the USB Data received from the USB are output to VPI/VMI in either of two ways, differentially or single ended. To receive data from the USB, force OE high and SUSP low. Differential data arriving at D+/D- appear as differential logic signals at VPI/VMI, and as a single-ended logic signal at RCV. If both D+ and D- are low, then VPI and VMI are low, signaling a single-ended zero condition on the bus; RCV remains in the last known state (Table 3). Transmitting Data to the USB The MAX3344E/MAX3345E output data to the USB differentially on D+ and D-. The logic driving signals can be either differential or single ended. For sending differential logic, force MODE high, force OE and SUSP low, and apply data to VPO and VMO. D+ then follows VPO, and D- follows VMO. To send single-ended logic signals, force MODE, SUSP, and OE low, and apply data to VPO/VMO.
MAX3344E/MAX3345E
VOHD - 0.3V D+/DVOLD + 0.3V
Figure 2. Enable and Disable Timing, Transmitter
VL VPO 0V tPHLO VTRM tPLHO D+ VL/2
ESD Protection
To protect the MAX3344E/MAX3345E against ESD, D+ and D- have extra protection against static electricity to protect the device up to 15kV. The ESD structures withstand high ESD in all states -- normal operation, suspend, and powered down. For the 15kV ESD structures to work correctly, a 1F or greater capacitor must be connected from VTRM to GND. ESD protection can be tested in various ways; the D+ and D- input/output pins are characterized for protection to the following limits: 1) 15kV using the Human Body Model 2) 8kV using the IEC 1000-4-2 Contact Discharge Method 3) 10kV using the IEC 1000-4-2 Air-Gap Method ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 1a shows the Human Body Model, and Figure 1b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor.
0V
D-
Figure 3. Mode 0 Timing
VL VL/2 0V tPHL1 VL VL/2 0V tPLH1 VTRM VL/2 VMO tPLH1 D+ tPLH1 VPO
0V
D-
Figure 4. Mode 1 Timing
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9
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Table 3a. Truth Table Transmit (SUSP = 0, OE = 0, ENUM = X)
INPUT MODE 0 0 0 0 1 1 1 VPO 0 0 1 1 0 0 1 VMO 0 1 0 1 0 1 0 D+ 0 0 1 0 0 0 1 D1 0 0 0 0 1 0 RCV 0 RCV* 1 RCV* RCV* 0 1 OUTPUT VPI 0 0 1 0 0 0 1 VMI 1 0 0 0 0 1 0 RESULT LOGIC 0 SE0 LOGIC 1 SE0 SE0 LOGIC 0 LOGIC 1
1 1 1 1 1 X 1 1 UNDEFINED *RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
Table 3b. Truth Table Receive (SUSP = 0, OE = 1, ENUM = X)
INPUT D+ 0 0 1 1 D0 1 0 1 RCV RCV* 0 1 X VPI 0 0 1 1 OUTPUT VMI 0 1 0 1 RESULT SE0 LOGIC 0 LOGIC 1 UNDEFINED
*RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period.
Table 3c. Truth Table Transmit in Suspend* (SUSP = 1, OE = 0, ENUM = X)
INPUT MODE 0 0 0 0 1 1 1 1 VPO 0 0 1 1 0 0 1 1 VMO 0 1 0 1 0 1 0 1 D+ 0 0 1 0 0 0 1 1 D1 0 0 0 0 1 0 1 RCV 0 0 0 0 0 0 0 0 OUTPUT VPI 0 0 1 0 0 0 1 1 VMI 1 0 0 0 0 1 0 1 RESULT LOGIC 0 SE0 LOGIC 1 SE0 SE0 LOGIC 0 LOGIC 1 UNDEFINED
*Timing specifications are not guaranteed for D+ and D-.
Table 3d. Truth Table Receive in Suspend* (SUSP = 1, OE = 1, MODE = X, VPO/VMO = X, ENUM = X)
INPUT D+ 0 0 1 1 D0 1 0 1 RCV 0 0 0 0 VPI 0 0 1 1 OUTPUT VMI 0 1 0 1 RESULT VPI/VMI ACTIVE VPI/VMI ACTIVE VPI/VMI ACTIVE VPI/VMI ACTIVE
*Timing specifications are not guaranteed for D+ and D-. 10 ______________________________________________________________________________________
15kV ESD-Protected USB Transceivers in UCSP with USB Detect
IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3344E/MAX3345E help the user design equipment that meets level 4 of IEC 1000-4-2, without the need for additional ESD-protection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 1c shows the IEC 1000-4-2 model. The Air-Gap Discharge Method involves approaching the device with a charged probe. The Contact Discharge Method connects the probe to the device before the probe is energized. Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.
Applications Information
External Components
External Resistors Two external 23.7 1% to 27.4 1%, 1/2W resistors are required for USB connection. Place the resistors in between the MAX3344E/MAX3345E and the USB connector on the D+ and D- lines (see the Typical Operating Circuit). External Capacitors Use three external capacitors for proper operation. Use a 0.1F ceramic for decoupling VL, a 1F ceramic for decoupling VCC, and a 1.0F (min) ceramic or plastic filter capacitor on VTRM. Return all capacitors to GND.
MAX3344E/MAX3345E
UCSP Applications Information
For the latest application details on UCSP construction, dimensions, tape carrier information, printed circuit board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, refer to the Application Note UCSP--A Wafer-Level Chip-Scale Package available on Maxim's website at www.maxim-ic.com/ucsp.
Chip Information
TRANSISTOR COUNT: 2162 PROCESS: BiCMOS
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11
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
D+ 3V
DtPHL(RCV) RCV tPLH(RCV)
0V
VL VL/2 0V tPHL(SE) tPLH(SE) VL VL/2 0V tPLH(SE) tPHL(SE) VL VL/2 0V D+/D- RISE/FALL TIMES 8ns, VL = 1.65V, 2.5V, 3.3V
VPI
VMI
Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays
TEST POINT 3.3V D+ 1.5k CL= 50pF 15k 25pF 23.7
MAX3344E MAX3345E
VMI OR VPI OR RCV
TEST POINT
MAX3344E MAX3345E
D-
TEST POINT 23.7
(a) LOAD FOR VPI, VMI, AND RCV
CL= 50pF
15k
MAX3344E MAX3345E
D+ OR D-
23.7
TEST POINT 200
USB_DET 25pF
50pF
+ -
GND OR VCC
(b) LOAD FOR D+, D-, AND USB_DET
(c) LOAD FOR ENABLE AND DISABLE TIME, D+/D-
Figure 6. Test Circuits 12 ______________________________________________________________________________________
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Functional Diagram
USB SUPPLY VCC VL VTRM TO INTERNAL CIRCUITS LINEAR REGULATOR Vbg BANDGAP
MAX3344E MAX3345E
ENUM RCV GND SUSP TRANSMITTER VMO MODE VPO OE VMI USB_DET VPI SINGLE-ENDED RECEIVERS Vbg TO INTERNAL CIRCUITS D+ 23.7 D23.7 RECEIVER 1.5k
EXTERNAL RESISTORS
Pin Configurations
TOP VIEW
RCV 1 VPO MODE 2 3 16 USB_DET 15 VL 14 VTRM D VPO C VMO B OE A VPI VMI VCC GND SUSP ENUM DMODE USB_DET D+ RCV VL VTRM 1 2 3 4
BOTTOM VIEW
MAX3344E/MAX3345E
VMO 4 OE 5 SUSP 6 VPI 7 VMI 8
MAX3344E MAX3345E
13 D+ 12 D11 GND 10 VCC 9 ENUM
TSSOP
UCSP
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13
15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
16L,UCSP.EPS
PACKAGE OUTLINE, 4x4 UCSP 21-0101 H
1 1
14
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15kV ESD-Protected USB Transceivers in UCSP with USB Detect MAX3344E/MAX3345E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
TSSOP4.40mm.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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