MC74LCX2245 Datasheet, PDF (1/8 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL TRANSCEIVER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Preview
Low-Voltage CMOS Octal
Transceiver
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
MC74LCX2245
The MC74LCX2245 is a high performance, non–inverting octal
transceiver operating from a 2.7 to 3.6V supply. High impedance TTL
compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. A VI specification of 5.5V allows MC74LCX2245 inputs to
be safely driven from 5V devices. The MC74LCX2245 is designed to
reduce output overshoot and undershoot and is suitable for memory
address driving and all TTL level bus oriented transceiver applications;
especially those requiring the very quiet outputs.
Current drive capability is 12mA at both A and B ports. The
Transmit/Receive (T/R) input determines the direction of data flow
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable input, when HIGH, disables both A and B
ports by placing them in a HIGH Z condition.
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
DW SUFFIX
20–LEAD PLASTIC SOIC
CASE 751D–04
• Designed for 2.7 to 3.6V VCC Operation
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
• IOFF Specification Guarantees High Impedance When VCC = 0V
• LVTTL Compatible
• LVCMOS Compatible
• 12mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (10µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
M SUFFIX
20–LEAD PLASTIC SOIC EIAJ
CASE 967–01
SD SUFFIX
20–LEADPLASTIC SSOP
CASE 940C–03
DT SUFFIX
20–LEAD PLASTIC TSSOP
CASE 948E–02
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
Figure 1. 20–Lead Pinout
(Top View)
PIN NAMES
Pins
Function
OE
T/R
A0–A7
B0–B7
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
1/97
© Motorola, Inc. 1997
1
REV 0