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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 54HCT |
| 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 | 6mA, 6mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | 20-CDIP (0.300", 7.62mm) |
| Supplier Device Package | 20-CDIP |
The SN54HCT240J from Texas Instruments is a dual inverting buffer in the 54HCT logic family, designed for 5V systems. It operates from 4.5V to 5.5V and provides 6mA source and sink current per channel, making it compatible with TTL loads. The 3-State outputs enable bus sharing and isolation. Packaged in a ceramic 20-CDIP, it operates from -55°C to 125°C, suitable for military and industrial applications. Typical uses include memory buffering, signal inversion, and TTL-to-CMOS interfacing.
- TTL-Compatible Inputs: Directly interfaces with 5V TTL logic without level shifting.
- 3-State Outputs: Allows multiple devices to share a bus safely.
- Wide Temperature Range: -55°C to 125°C for extreme environments.
- Ceramic DIP Package: High reliability and easy through-hole mounting.
TTL-Compatible Bus Buffering
The 54HCT family accepts TTL input levels while providing CMOS output drive, making the SN54HCT240J ideal for interfacing TTL and CMOS systems.
Memory Address/Data Buffering
Use the dual inverting buffers to drive address or data lines to multiple memory chips, with 3-State outputs for bus isolation.
High-Reliability Military Electronics
With a -55°C to 125°C range and ceramic DIP package, it meets MIL-STD-883 requirements for defense and aerospace systems.
Signal Inversion in Control Panels
Invert active-low control signals (e.g., reset, enable) without additional gates, simplifying PCB layout.
Driving LED Indicators
The 6mA sink current can drive standard LEDs with a series resistor, providing visual status indication in industrial equipment.
Industrial PLC I/O Modules
Buffer and invert signals between PLC logic and field devices, ensuring clean signal integrity over long traces.
- Q: What is the logic family of the SN54HCT240J?
- A: It belongs to the 54HCT family, which is a high-speed CMOS logic family with TTL-compatible inputs, operating at 4.5V to 5.5V.
- Q: What is the function of this device?
- A: It is a dual (2-channel) inverting buffer with 3-State outputs, used for signal buffering and bus driving.
- Q: How many channels does it have?
- A: The SN54HCT240J contains 2 independent inverting buffer channels.
- Q: What is the output type?
- A: It features 3-State outputs, allowing high-impedance disconnection for shared bus applications.
- Q: What are the voltage and current specifications?
- A: Supply voltage is 4.5V to 5.5V; each output can source and sink 6mA, suitable for TTL loads.
- Q: What package is available?
- A: It comes in a 20-CDIP (ceramic dual-inline package) with 0.300-inch width, rated for -55°C to 125°C.
SN54HCT240J.pdf
- Q: What is the logic family of the SN54HCT240J?
- A: It belongs to the 54HCT family, which is a high-speed CMOS logic family with TTL-compatible inputs, operating at 4.5V to 5.5V.
- Q: What is the function of this device?
- A: It is a dual (2-channel) inverting buffer with 3-State outputs, used for signal buffering and bus driving.
- Q: How many channels does it have?
- A: The SN54HCT240J contains 2 independent inverting buffer channels.
- Q: What is the output type?
- A: It features 3-State outputs, allowing high-impedance disconnection for shared bus applications.
- Q: What are the voltage and current specifications?
- A: Supply voltage is 4.5V to 5.5V; each output can source and sink 6mA, suitable for TTL loads.
- Q: What package is available?
- A: It comes in a 20-CDIP (ceramic dual-inline package) with 0.300-inch width, rated for -55°C to 125°C.