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Product attributes Property Value
Manufacturer Fairchild Semiconductor
Product Series 74ACT
Packaging Bulk |
Part Status Active
Logic Type Buffer, Inverting
Number of Elements 2
Number of Bits per Element 4
Input Type -
Output Type 3-State
Current - Output High, Low 24mA, 24mA
Voltage - Supply 4.5V ~ 5.5V
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 20-SOIC (0.295", 7.50mm Width)
Supplier Device Package 20-SOIC
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The 74ACT240 from Fairchild Semiconductor is an inverting buffer designed for 5V systems. It operates from 4.5V to 5.5V and provides 24mA output drive. This 8-bit buffer features 3-state outputs and is part of the 74ACT family, offering TTL-compatible inputs and high-speed performance. It is available in a 20-SOIC package and operates over a temperature range of -40°C to 85°C, making it suitable for a wide range of industrial and consumer applications.

  • 5V TTL-Compatible Inputs: Directly interfaces with legacy 5V logic without level shifting.
  • High Output Drive (24mA): Drives heavy loads and long transmission lines.
  • Inverting Function: Provides signal inversion, reducing the need for additional logic gates.
  • 3-State Outputs: Enables bus sharing and isolation in multi-device systems.

5V Legacy System Interfacing

The 74ACT240 is ideal for buffering signals in traditional 5V TTL systems, ensuring compatibility with legacy microcontrollers and peripherals.

Inverting Bus Buffers

Use it when signal inversion is required in the data path, such as in address decoding or control signal generation.

High-Capacitance Load Driving

With 24mA output drive, it can drive long PCB traces, cables, and multiple loads in industrial control panels.

Memory Address/Data Buffering

Buffer address and data lines in 5V memory systems, improving signal integrity and reducing loading on the memory controller.

Motor Control Logic

In motor drive circuits, it buffers PWM and direction signals from a 5V controller to power stage drivers.

Test and Measurement Equipment

Its high-speed 74ACT performance makes it suitable for buffering signals in benchtop instruments and data acquisition systems.

Q: What is the logic family of the 74ACT240SC?
A: It belongs to the 74ACT family, which is TTL-compatible and operates at 5V.
Q: What is the function of this IC?
A: It is an inverting buffer with 3-state outputs.
Q: How many channels does it have?
A: It has 2 channels (each with 4 bits, total 8 bits).
Q: What is the output type?
A: The output is 3-State, allowing for high-impedance states.
Q: What is the operating voltage range?
A: It operates from 4.5V to 5.5V.
Q: What package is available?
A: It comes in a 20-SOIC package.
Base Product Number : 74ACT240
3-State 4.5V-5.5V 5V Logic 74ACT Buffer Fairchild Semiconductor Inverting Logic IC SOIC
Q: What is the logic family of the 74ACT240SC?
A: It belongs to the 74ACT family, which is TTL-compatible and operates at 5V.
Q: What is the function of this IC?
A: It is an inverting buffer with 3-state outputs.
Q: How many channels does it have?
A: It has 2 channels (each with 4 bits, total 8 bits).
Q: What is the output type?
A: The output is 3-State, allowing for high-impedance states.
Q: What is the operating voltage range?
A: It operates from 4.5V to 5.5V.
Q: What package is available?
A: It comes in a 20-SOIC package.