C0077C0079C0084C0079C0082C0079C0076C0065
SEMICONDUCTOR TECHNICAL DATA
1 REV 3 Motorola, Inc. 1996
9/95

C0076C0111C0119C0045C0086C0111C0108C0116C0097C0103C0101 C0067C0077C0079C0083 C0079C0099C0116C0097C0108
C0084C0114C0097C0110C0115C0099C0101C0105C0118C0101C0114
C0087C0105C0116C0104 C0053C0086C0045C0084C0111C0108C0101C0114C0097C0110C0116 C0073C0110C0112C0117C0116C0115 C0097C0110C0100 C0079C0117C0116C0112C0117C0116C0115
C0040C0051C0045C0083C0116C0097C0116C0101C0044 C0078C0111C0110C0045C0073C0110C0118C0101C0114C0116C0105C0110C0103C0041
The MC74LCX245 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 V
I
specification of 5.5V allows MC74LCX245 inputs to be
safely driven from 5V devices. The MC74LCX245 is suitable for memory
address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24mA 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.
• Designed for 2.7 to 3.6V V
CC
Operation
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
• I
OFF
Specification Guarantees High Impedance When V
CC
= 0V
• LVTTL Compatible
• LVCMOS Compatible
• 24mA 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
Pinout: 20–Lead (Top View)
1920 18 17 16 15 14
21 34567
V
CC
13
8
12
9
11
10
OE B0 B1 B2 B3 B4 B5 B6 B7
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
DT SUFFIX
PLASTIC TSSOP
CASE 948E–02
20
1
20
1
M SUFFIX
PLASTIC SOIC EIAJ
CASE 967–01
20
1
SD SUFFIX
PLASTIC SSOP
CASE 940C–03
20
1
C0077C0067C0055C0052C0076C0067C0088C0050C0052C0053
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
PIN NAMES
Function
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
Pins
OE
T/R
A0–A7
B0–B7