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MC74LCX16500 Datasheet(PDF) 1 Page - Motorola, Inc

Part No. MC74LCX16500
Description  LOW-VOLTAGE CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC74LCX16500 Datasheet(HTML) 1 Page - Motorola, Inc

 
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
1
REV 1
© Motorola, Inc. 1997
3/97
Low-Voltage CMOS 18-Bit
Universal Bus Transceiver
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
The MC74LCX16500 is a high performance, non–inverting 18–bit
universal bus transceiver operating from a 2.7 to 3.6V supply. This part is
not byte controlled; it is “18–bit” controlled. 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 MC74LCX16500 inputs to
be safely driven from 5V devices. The MC74LCX16500 is suitable for
memory address driving and all TTL level bus oriented transceiver
applications.
Data flow in each direction is controlled by Output Enable (OEAB,
OEBA), Latch Enable (LEAB, LEBA) and Clock inputs (CAB, CBA). When
LEAB is HIGH, the A–to–B dataflow is transparent. When LEAB is LOW,
and CAB is held at LOW or HIGH, the data A is latched; on the
HIGH–to–LOW transition of CAB the A–data is stored in the
latch/flip–flop. The outputs are active when OEAB is HIGH. When OEAB
is LOW the B–outputs are in 3–state. Similarly, the LEBA, OEBA and CBA
control the B–to–A dataflow. Please note that the output enables are
complementary; OEAB is active HIGH, OEBA is active LOW.
Designed for 2.7 to 3.6V VCC Operation
6ns 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
DT SUFFIX
56–LEAD PLASTIC TSSOP PACKAGE
CASE 1202–01
PIN NAMES
Function
Output Enable Inputs
Clock Pulse Inputs
Latch Enable Inputs
Side A Inputs/Outputs
Side B Inputs/Outputs
Pins
OEAB, OEBA
CAB, CBA
LEAB, LEBA
A0–A17
B0–B17
MC74LCX16500
LOW–VOLTAGE CMOS
18–BIT UNIVERSAL BUS
TRANSCEIVER


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