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PI74LPT2Q245

Description
Fast CMOS 3.3V 8-Bit Bidirectional Transceiver
File Size63KB,4 Pages
ManufacturerPericom Semiconductor Corporation (Diodes Incorporated)
Websitehttps://www.diodes.com/
Download Datasheet View All

PI74LPT2Q245 Overview

Fast CMOS 3.3V 8-Bit Bidirectional Transceiver

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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LPT2Q245
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
Product Pin Configuration
Product Pin Description
Pin Name Description
OE
3-State Output Enable
Inputs (Active LOW)
Direction Control Input
Side A Inputs or
3-State Outputs
Side B Inputs or
3-State Outputs
Ground
Power
OE
A
0
B
0
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
1
A
5
20-PIN
L20
Q20
R20
S20
T/R
A0-A7
B0-B7
GND
V
CC
Truth Table
(1)
Inputs
(1)
OE
L
B
6
B
5
A
6
T/R
L
H
X
Outputs
(1)
Bus B Data to Bus A
Bus A Data to Bus B
High State Z
L
H
A
7
B
7
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
1
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