SEMICONDUCTOR TECHNICAL DATA
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
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
performance. A V specification of 5.5V allows MC74LCX2245 inputs to
I
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.
DW SUFFIX
20–LEAD PLASTIC SOIC
CASE 751D–04
M SUFFIX
20–LEAD PLASTIC SOIC EIAJ
CASE 967–01
• Designed for 2.7 to 3.6V V
CC
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
Operation
• I
OFF
Specification Guarantees High Impedance When V
= 0V
CC
• LVTTL Compatible
SD SUFFIX
20–LEADPLASTIC SSOP
CASE 940C–03
• 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
DT SUFFIX
20–LEAD PLASTIC TSSOP
CASE 948E–02
• ESD Performance: Human Body Model >2000V; Machine Model >200V
V
OE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
CC
20
PIN NAMES
Pins
Function
OE
T/R
A0–A7
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
1
2
3
4
5
6
7
9
8
10
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
B0–B7
Side B 3–State Inputs or 3–State
Outputs
Figure 1. 20–Lead Pinout
(Top View)
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
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Motorola, Inc. 1997