PI74LPT2Q245 Datasheet, PDF (1/4 Pages) Pericom Semiconductor Corporation – Fast CMOS 3.3V 8-Bit Bidirectional Transceiver

PI74LPT2Q245
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Fast CMOS 3.3V 8-Bit Bidirectional Transceiver
Product Features
• Compatible with LCX™ and LVT™ families of products
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (12 mA sink and source)
• 33Ω Series Resistors on all outputs
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 150 mil wide plastic TQSOP (R)
– 20-pin 300 mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor’s PI74LPT series of logic circuits are
produced in the Company’s advanced 0.6 micron CMOS technology
achieving high speed while maintaining low power operation.
The PI74LPT2Q245 is an 8-bit bidirectional transceiver designed
for asynchronous two-way communication between data buses.
The transmit/receive input pin (T/R) determines the direction of
data flow through the bidirectional transceiver. Transmit (active
HIGH) enables data from A ports to B ports, and receive (active
LOW) from B ports to A ports. The Output Enable (OE) input, when
HIGH, disables both A and B ports by placing them in HIGH Z
condition.
The PI74LPT2Q245 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed 3.3V/5.0V
system.
Logic Block Diagram
T/R
OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
1A5
B5
A6
B6
A7
B7
Product Pin Configuration
20-PIN
L20
Q20
R20
S20
Product Pin Description
Pin Name Description
OE 3-State Output Enable
Inputs (Active LOW)
T/R Direction Control Input
A0-A7 Side A Inputs or
3-State Outputs
B0-B7 Side B Inputs or
3-State Outputs
GND Ground
VCC Power
Truth Table⁽¹⁾
Inputs⁽¹⁾
OE
T/R
Outputs⁽¹⁾
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
High State Z
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
1
PS8097 03/25/97