MC74LCX16501 Datasheet, PDF (1/10 Pages) Motorola, Inc – LOW-VOLTAGE CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS 18-Bit
Universal Bus Transceiver
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
MC74LCX16501
The MC74LCX16501 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 MC74LCX16501 inputs to
be safely driven from 5V devices. The MC74LCX16501 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
LOW–to–HIGH 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 tpd Maximum
• 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
LOW–VOLTAGE CMOS
18–BIT UNIVERSAL BUS
TRANSCEIVER
DT SUFFIX
56–LEAD PLASTIC TSSOP PACKAGE
CASE 1202–01
PIN NAMES
Pins
OEAB, OEBA
CAB, CBA
LEAB, LEBA
A0–A17
B0–B17
Function
Output Enable Inputs
Clock Pulse Inputs
Latch Enable Inputs
Side A Inputs/Outputs
Side B Inputs/Outputs
3/97
© Motorola, Inc. 1997
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