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Product attributes Property Value
Manufacturer Texas Instruments
Product Series 74AHC
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 8mA, 8mA
Voltage - Supply 2V ~ 5.5V
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 20-SOIC (0.209", 5.30mm Width)
Supplier Device Package 20-SO

The SN74AHC240NS from Texas Instruments is a high-speed CMOS octal inverting buffer with 3-State outputs. Operating from 2V to 5.5V, it provides 8mA of drive current per channel, making it suitable for both 3.3V and 5V logic systems. The inverting function is ideal for generating active-low control signals, while the 3-State outputs enable bus sharing. Its low power consumption and wide supply range make it a versatile choice for portable electronics, industrial controls, and telecom equipment. Packaged in a 20-SOIC, it offers a compact solution for space-constrained designs.

  • Wide 2V to 5.5V Supply Range: Supports both 3.3V and 5V logic, reducing the need for level shifters.
  • Low Power Consumption: Ideal for battery-powered and energy-efficient applications.
  • 3-State Outputs: Facilitates bus multiplexing and reduces signal contention.
  • 8mA Drive Current: Ensures reliable signal transmission over moderate distances.

Mixed-Voltage Bus Buffering

Buffer address and data lines in systems with both 3.3V and 5V components. The 2V to 5.5V supply range allows the SN74AHC240NS to operate at either voltage, providing flexibility in multi-rail designs.

Inverting Signal Conditioning

Use the inverting outputs to generate active-low control signals from positive-logic sources. This is useful for chip selects, resets, and enable lines in digital systems.

High-Capacitance Load Driving

Drive long PCB traces or multiple loads with the 8mA output current. The 74AHC family's low output impedance maintains signal edges, reducing ringing and crosstalk.

Industrial Sensor Multiplexing

Multiplex multiple sensor outputs onto a single microcontroller input. The 3-State outputs allow individual sensor selection without external analog switches.

Portable Device Power Management

Control power switches in battery-powered devices. The low power consumption of 74AHC logic minimizes battery drain, while the inverting function can drive active-low enable pins.

Telecom Line Interface

Buffer and invert signaling lines in telecom equipment. The wide temperature range (-40°C to 85°C) and robust CMOS design ensure reliable operation in central office environments.

Q: What logic family is the SN74AHC240NS?
A: It belongs to the 74AHC (Advanced High-Speed CMOS) family.
Q: What is the function?
A: It is an inverting octal buffer with 2 channels (4 buffers per channel).
Q: What is the output type?
A: It features 3-State outputs for bus applications.
Q: What is the voltage range?
A: It operates from 2V to 5.5V, supporting both 3.3V and 5V systems.
Q: What is the package?
A: It comes in a 20-SOIC (0.209", 5.30mm Width) package.
Q: What is the output current?
A: It can source or sink 8mA per output.
Base Product Number : SN74AHC240
20-SOIC 2V-5.5V 3-State 74AHC Buffer CMOS Buffer Inverting Logic IC Texas Instruments
Q: What logic family is the SN74AHC240NS?
A: It belongs to the 74AHC (Advanced High-Speed CMOS) family.
Q: What is the function?
A: It is an inverting octal buffer with 2 channels (4 buffers per channel).
Q: What is the output type?
A: It features 3-State outputs for bus applications.
Q: What is the voltage range?
A: It operates from 2V to 5.5V, supporting both 3.3V and 5V systems.
Q: What is the package?
A: It comes in a 20-SOIC (0.209", 5.30mm Width) package.
Q: What is the output current?
A: It can source or sink 8mA per output.