MC74LCX16543 Datasheet, PDF (1/8 Pages) Motorola, Inc – LOW-VOLTAGE CMOS 16-BIT LATCHING TRANSCEIVER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
Low-Voltage CMOS 16-Bit
Latching Transceiver
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
MC74LCX16543
The MC74LCX16543 is a high performance, non–inverting 16–bit
latching transceiver operating from a 2.7 to 3.6V supply. The device is
byte controlled. Each byte has separate control inputs which can be tied
together for full 16–bit operation. 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 MC74LCX16543 inputs to be safely driven from 5V devices.
The MC74LCX16543 is suitable for memory address driving and all TTL
level bus oriented transceiver applications.
For data flow from A to B with the EAB LOW, the A–to–B Output
Enable (OEAB) must be LOW in order to enable data to the B bus, as
indicated in the Function Table. With EAB LOW, a LOW signal on the
A–to–B Latch Enable (LEAB) input makes the A–to–B latches
transparent; a subsequent LOW–to–HIGH transition of the LEAB signal
will latch the A latches, and the outputs no longer change with the A
inputs. With EAB and OEAB both LOW, the 3–State B output buffers are
active and reflect the data present at the output of the A latches. Control
of data flow from B to A is symetric to that above, but uses the EBA,
LEBA, and OEBA inputs.
LOW–VOLTAGE CMOS
16–BIT LATCHING
TRANSCEIVER
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1202–01
• Designed for 2.7 to 3.6V VCC Operation
• 5.2ns Maximum tpd
• 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
• 24mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (20µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
PIN NAMES
Pins
Function
OExxn
Exxn
LExxn
A0–A15
B0–B15
Output Enable Inputs
Enable Inputs
Latch Enable Inputs
3–State Inputs/Outputs
3–State Inputs/Outputs
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
11/96
© Motorola, Inc. 1996
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