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| Product attributes | Property Value |
| Manufacturer | onsemi |
| Product Series | 74HC |
| 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 | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 20-TSSOP |
| ROHS |  |
The MC74HC240ADT from onsemi is a dual inverting buffer with 3-State outputs, part of the 74HC logic family. It is designed for high-speed CMOS operation with a supply range of 2V to 6V, making it compatible with TTL and standard CMOS logic. Each of the two channels can drive up to 7.8mA, providing adequate drive for most logic loads. The 3-State outputs allow for bus connection and isolation. Housed in a 20-pin TSSOP package, this buffer is suitable for signal inversion, bus driving, and interfacing in industrial, automotive, and consumer applications.
- Wide 2V to 6V Supply Range: Compatible with TTL, CMOS, and 5V systems, providing design flexibility.
- Inverting Outputs: Useful for active-low signal generation and logic inversion without additional components.
- 3-State Outputs: Enables bus sharing and isolation, preventing data contention.
- Wide Temperature Range (-55°C to 125°C): Suitable for harsh automotive and industrial environments.
Inverting Signal Buffering
The MC74HC240ADT provides signal inversion, which is useful in applications where an inverted logic signal is required. It can be used to drive LEDs or other loads where an active-low signal is needed.
Bus Driving with 3-State Control
The 3-State outputs allow this buffer to be used in bus-oriented systems. When the output enable pin is high, the outputs are in a high-impedance state, allowing other devices to drive the bus.
Interfacing with 5V and 12V Systems
With a supply range of 2V to 6V, this buffer can operate at 5V and interface with TTL logic. It can also be used in systems with 12V rails by using appropriate level shifting techniques.
Driving High-Capacitance Loads
The 7.8mA output drive is sufficient for driving moderate capacitive loads, such as long PCB traces or multiple logic inputs, ensuring signal integrity in high-speed designs.
Industrial Control Logic Inversion
In industrial control panels, this buffer can be used to invert control signals from a PLC or microcontroller, allowing for active-low control of relays or other actuators.
Automotive Lighting Control
With a wide temperature range of -55°C to 125°C, this device can be used in automotive lighting systems to buffer and invert control signals for LED drivers or lamp relays.
- Q: What is the logic family of the MC74HC240ADT?
- A: It belongs to the 74HC (High-Speed CMOS) family, offering a balance of speed and power.
- Q: What is the function of this IC?
- A: It is a dual (2-channel) inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 2 independent inverting buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for high, low, or high-impedance states.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with TTL, CMOS, and higher-voltage systems.
- Q: What package is available?
- A: It is available in a 20-pin TSSOP package (4.40mm width).
MC74HC240ADT.pdf
- Q: What is the logic family of the MC74HC240ADT?
- A: It belongs to the 74HC (High-Speed CMOS) family, offering a balance of speed and power.
- Q: What is the function of this IC?
- A: It is a dual (2-channel) inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 2 independent inverting buffer channels.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for high, low, or high-impedance states.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with TTL, CMOS, and higher-voltage systems.
- Q: What package is available?
- A: It is available in a 20-pin TSSOP package (4.40mm width).