Texas Instruments CY54 74FCT240T CY54 74FCT244T Data Sheet Manual
Summary
These octal buffers and line drivers are designed for high-speed digital circuits, making them ideal for memory address drivers, clock signals, and bus-oriented transmissions. They provide robust performance and reduced power consumption while maintaining speeds comparable to older FCT logic, ensuring compatibility with modern 3.3V TTL and CMOS devices without external components. The comprehensive manual details crucial electrical characteristics, pinouts (DIP/SOIC/QSOP), operational ranges, and advanced features like Power-Off Disable, assisting system designers in integrating reliable and efficient signal conditioning into their complex electronic systems.
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CY54/74FCT240T CY54/74FCT244T
SCCS017 - May 1994 - Revised February 2000 8-Bit Buffers/Line Drivers
Features Sink current 64 m A (Com’l), 48 m A (Mil) Source current 32 m A (Com’l), 12 m A (Mil)
Function, pinout, and drive compatible with FCT and
F logic Functional Description
FCT-D speed at 3.6 ns max. (Com’l FCT244 only),
The FCT240T and FCT244T are octal buffers and line drivers
FCT-C speed at 4.1 ns max. (Com’l),
designed to be employed as memory address drivers, clock
FCT-A speed at 4.8 ns max. (Com’l)
drivers, and bus-oriented transmitters/receivers. The devices
Reduced VOH (typically = 3.3V) versions of equivalent
provide speed and drive capabilities equivalent to their fastest
FCT functions
bipolar logic counterparts while reducing power consumption. The
Edge-rate control circuitry for significantly improved
input and output voltage levels allow direct interface with TTL,
noise characteristics
NMOS, and CMOS devices without external components.
Power-off disable feature
The outputs are designed with power-off disable feature to
ESD > 2000V
allow for live insertion of boards.
Matched rise and fall times Fully compatible with TTL input and output logic levels Extended commercial range of −40˚C to +85˚C
Logic Block Diagram
FCT240T
FCT244T
DA0 OA0
DA0 OA0
OB0 DB0
OB0 DB0
DA1 OA1
DA1 OA1
OB1 DB1
OB1 DB1
DA2 OA2
DA2 OA2
OB2 DB2
OB2 DB2
DA3 OA3
DA3 OA3
OB3 DB3
OB3 DB3
FCT240T–1 FCT240T–4
Pin Configurations
DIP/SOIC/QSOP DIP/SOIC/QSOP Top View Top View
LCC LCC Top View Top View
OEA VCC OEA VCC DA0 OEB DA0 OEB OB0 OA0 OB0 OA0 OB3 DA1 DB0 OB0OB3 DA1 DB0
GND OB1 FCT240T OA1 GND DA0 OB1 FCT244T OA1
FCT240T DA0
DB3 DB3 FCT244T OEA DA2 DB1
OEA DA2 DB1
OA3 VCC OA3 VCC
OB2 OA2 OB2 OA2
DB2 OEB DB2 OEB
DA3 DB2 DA3 DB2 OB3 OA3 OB3 OA3 GND DB3 GND DB3
FCT240T–2 FCT240T–3 FCT240T–5 FCT240T–6
Copyright © 2000, Texas Instruments Incorporated
Page Summary Contents For Texas Instruments CY54 74FCT240T CY54 74FCT244T Data Sheet Manual
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 8 |
| File Size | 95.02 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
What logic devices are compatible with this buffer?
It is fully compatible with TTL, CMOS, and NMOS devices without needing external components.
Must I connect unused inputs?
Yes, unused inputs must always be connected to an appropriate logic voltage level, preferably VCC or ground.
What is the maximum ambient operating temperature?
The device supports an ambient operating range of –65°C to +135°C.