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Product attributes Property Value
Manufacturer Harris Corporation
Product Series
Packaging Bulk |
Part Status Active
Logic Type Buffer, Non-Inverting
Number of Elements 1
Number of Bits per Element 8
Input Type -
Output Type 3-State
Current - Output High, Low 15mA, 64mA
Voltage - Supply 4.75V ~ 5.25V
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 20-SSOP (0.154", 3.90mm Width)
Supplier Device Package 20-SSOP (0.154", 3.90mm Width)

The CD74FCT2244CTQM from Harris Corporation is a non-inverting buffer designed for high-speed 5V systems. Operating from 4.75V to 5.25V, it provides 3-state outputs with 15mA source and 64mA sink current capability. Housed in a 20-SSOP package, it is suitable for bus interfacing, memory buffering, and peripheral driving in industrial and legacy TTL applications.

  • High 64mA Sink Current: Drives heavy loads and multiple TTL inputs without additional buffers.
  • 3-State Outputs: Enables bus sharing and isolation in multiplexed systems.
  • TTL-Compatible Inputs: Simplifies interfacing with legacy 5V logic.
  • Compact SSOP Package: Reduces PCB footprint in space-limited designs.

5V Bus Interfacing in Legacy Systems

With a 4.75V to 5.25V supply, this buffer is ideal for interfacing with legacy 5V TTL logic in industrial control panels and retro computing systems.

Memory Address Buffering

3-state outputs allow the CD74FCT2244CTQM to drive memory address lines while providing high-impedance state during bus arbitration, preventing data corruption.

Peripheral Driver for High-Current Loads

The 64mA sink capability enables driving multiple TTL loads or LEDs, making it useful for status indication in server racks.

Signal Fan-Out for Clock Distribution

Use as a buffer to distribute clock signals to multiple destinations with strong drive strength, maintaining signal integrity across the board.

Hot-Swap and Power Sequencing

3-state outputs facilitate hot-swapping of cards in backplane systems by isolating the bus during power-up or removal.

Test Equipment and Measurement

In benchtop instruments, this buffer can condition signals from sensors and switches, ensuring accurate readings in noisy lab environments.

Q: What is the logic family of the CD74FCT2244CTQM?
A: It belongs to the CD74FCT family, a high-speed CMOS logic series compatible with TTL levels.
Q: What function does this IC perform?
A: It is a non-inverting buffer with 3-state outputs, allowing bus isolation and multiplexing.
Q: How many channels are included?
A: It provides 1 channel (though typically octal, this variant is specified as 1 channel in the data).
Q: What is the output type?
A: It features 3-state outputs, enabling connection to shared buses with high-impedance state.
Q: What is the operating voltage range?
A: It operates at 4.75V to 5.25V, making it suitable for 5V TTL systems.
Q: What package is available?
A: It comes in a 20-SSOP package with a 3.90mm width, suitable for compact PCB layouts.
Base Product Number : CD74FCT2244
20-SSOP 3-State 5V Buffer Bus Interface CD74FCT Industrial Legacy Logic IC TTL
Q: What is the logic family of the CD74FCT2244CTQM?
A: It belongs to the CD74FCT family, a high-speed CMOS logic series compatible with TTL levels.
Q: What function does this IC perform?
A: It is a non-inverting buffer with 3-state outputs, allowing bus isolation and multiplexing.
Q: How many channels are included?
A: It provides 1 channel (though typically octal, this variant is specified as 1 channel in the data).
Q: What is the output type?
A: It features 3-state outputs, enabling connection to shared buses with high-impedance state.
Q: What is the operating voltage range?
A: It operates at 4.75V to 5.25V, making it suitable for 5V TTL systems.
Q: What package is available?
A: It comes in a 20-SSOP package with a 3.90mm width, suitable for compact PCB layouts.