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IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
FEATURES: DESCRIPTION:
IDT74ALVC245
* 0.5 MICRON CMOS Technology * Typical tSK(o) (Output Skew) < 250ps * ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * VCC = 3.3V 0.3V, Normal Range * VCC = 2.7V to 3.6V, Extended Range * VCC = 2.5V 0.2V * CMOS power levels (0.4 W typ. static) * Rail-to-Rail output swing for increased noise margin * Available in QSOP, SOIC, SSOP, and TSSOP packages
This octal bus transceiver is built using advanced dual metal CMOS technology. The three-state controls are designed to operate this device in a single-byte mode. All inputs are designed with hysteresis for improved noise margin. The ALVC245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The ALVC245 has been designed with a 24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.
DRIVE FEATURES:
* High Output Drivers: 24mA * Suitable for Heavy Loads
APPLICATIONS:
* 3.3V high speed systems * 3.3V and lower voltage computing systems
FUNCTIONAL BLOCK DIAGRAM
DIR
1
19
OE
A1
2
18
B1
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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(c)1999 Integrated Device Technology, Inc.
MARCH 1999
DSC-4917/1
IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) TSTG IOUT IIK IOK ICC ISS Description Max Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Continuous Clamp Current, VI < 0 or VI > VCC Continuous Clamp Current, VO < 0 Continuous Current through each VCC or GND -0.5 to +4.6 -0.5 to VCC+0.5 -65 to +150 -50 to +50 50 -50 100
Unit V V C mA mA mA mA
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC OE B1 B2 B3 B4 B5 B6 B7 B8
NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. VCC terminals. 3. All terminals except VCC.
QSOP/ SOIC/ SSOP/ TSSOP TOPVIEW
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT CI/O Parameter(1) Input Capacitance Output Capacitance I/O Port Capacitance Conditions VIN = 0V VOUT = 0V VIN = 0V Typ. 5 7 7 Max. 7 9 9 Unit pF pF pF
NOTE: 1. As applicable to the device type.
PIN DESCRIPTION
Pin Names OE DIR Ax Bx Description 3-State Output Enable Input (Active LOW) Direction-Control Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs
FUNCTION TABLE(1)
Inputs OE L L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
DIR L H X
Operation B data to A bus A data to B bus Isolation
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IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C
Symbol VIH VIL IIH IIL IOZH IOZL VIK VH ICCL ICCH ICCZ ICC Parameter Input HIGH Voltage Level Input LOW Voltage Level Input HIGH Current Input LOW Current High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current VCC = 2.3V, IIN = -18mA VCC = 3.3V VCC = 3.6V VIN = GND or VCC One input at VCC - 0.6V, other inputs at VCC or GND VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V VCC = 3.6V VCC = 3.6V VI = VCC VI = GND VO = VCC VO = GND Test Conditions Min. 1.7 2 -- -- -- -- -- -- -- -- -- Typ.(1) -- -- -- -- -- -- -- -- -0.7 100 0.1 Max. -- -- 0.7 0.8 5 5 10 10 -1.2 -- 40 V mV A A A A V Unit V
Quiescent Power Supply Current Variation
--
--
750
A
NOTE: 1. Typical values are at VCC = 3.3V, +25C ambient.
OUTPUT DRIVE CHARACTERISTICS
Symbol VOH Parameter Output HIGH Voltage VCC = 2.3V VCC = 2.3V VCC = 2.7V VCC = 3V VCC = 3V VOL Output LOW Voltage VCC = 2.3V to 3.6V VCC = 2.3V VCC = 2.7V VCC = 3V IOH = - 24mA IOL = 0.1mA IOL = 6mA IOL = 12mA IOL = 12mA IOL = 24mA Test Conditions(1) VCC = 2.3V to 3.6V IOH = - 0.1mA IOH = - 6mA IOH = - 12mA Min. VCC - 0.2 2 1.7 2.2 2.4 2 -- -- -- -- -- Max. -- -- -- -- -- -- 0.2 0.4 0.7 0.4 0.55 V Unit V
NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. TA = - 40C to + 85C.
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IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
OPERATING CHARACTERISTICS, TA = 25C
VCC = 2.5V 0.2V Symbol CPD CPD Parameter Power Dissipation Capacitance Outputs enabled Power Dissipation Capacitance Outputs disabled Test Conditions CL = 0pF, f = 10Mhz Typical VCC = 3.3V 0.3V Typical Unit pF
SWITCHING CHARACTERISTICS(1)
VCC = 2.5V 0.2V Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tSK(O) Parameter Propagation Delay Ax to Bx or Bx to Ax Output Enable Time OE or DIR to Ax or Bx Output Disable Time OE or DIR to Ax or Bx Output Skew(2) -- -- -- -- -- 500 ps 1.5 7.5 1.5 5 1.5 4.8 ns 1.5 9.5 1.5 6.2 1.5 5.8 ns Min. 1.5 Max. 7 VCC = 2.7V Min. 1.5 Max. 5.6 VCC = 3.3V 0.3V Min. 1.5 Max. 5 Unit ns
NOTES: 1. See TEST CIRCUITS AND WAVEFORMS. TA = - 40C to + 85C. 2 Skew between any two outputs of the same package and switching in the same direction.
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IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V0.3V VCC(1)= 2.7V 6 2.7 1.5 300 300 50 6 2.7 1.5 300 300 50 VCC(2)= 2.5V0.2V 2 x Vcc Vcc Vcc / 2 150 150 30 Unit V V V mV mV pF
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
VIH VT 0V VOH VT VOL VIH VT 0V
ALVC Link
Propagation Delay
DISABLE
VCC 500 Pulse(1, 2) Generator VIN D.U.T. RT 500 CL
ALVC Link
VLOAD Open GND VOUT CONTROL INPUT tPZL OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ ENABLE VIH VT 0V VLOAD/2 VLZ VOL VOH VHZ 0V
ALVC Link
Test Circuit for All Outputs
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. NOTES: 1. Pulse Generator for All Pulses: Rate 10MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 10MHz; tF 2ns; tR 2ns.
Enable and Disable Times
SWITCH POSITION
Test Open Drain Disable Low Enable Low Disable High Enable High All Other Tests Switch VLOAD GND Open
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL SYNCHRONOUS CONTROL VIH VT 0V VOH VT VOL VOH VT VOL
tSU
tH
tREM
tSU
tH
VIH VT 0V VIH VT 0V VIH VT 0V VIH VT 0V
ALVC Link
Set-up, Hold, and Release Times
INPUT
tPLH1
tPHL1
OUTPUT 1
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
VT
tSK (x)
tSK (x)
OUTPUT 2 tPLH2 tPHL2
VT
ALVC Link
Pulse Width
ALVC Link
tSK(x) = tPLH2 - tPLH1 or tPHL2 - tPHL1
Output Skew - tSK(X)
NOTES: 1. For tSK(o) OUTPUT1 and OUTPUT2 are any two outputs. 2. For tSK(b) OUTPUT1 and OUTPUT2 are in the same bank.
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IDT74ALVC245 3.3V CMOS OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
X ALVC IDT XX Bus-Hold Temp. Range XXX XX Device Type Package
SO PY Q PG 245 Blank 74
Small Outline IC Shrink Small Outline Package Quarter-size Small Outline Package Thin Shrink Small Outline Package Octal Bus Transceiver with 3-State Outputs, 24mA No Bus-Hold -40C to +85C
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for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
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