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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-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 20-SOIC |
| ROHS |  |
The MC74HC240AFL2 from onsemi is a high-speed CMOS inverting buffer featuring two channels with 3-State outputs. Operating from 2V to 6V, it provides a versatile solution for signal buffering and inversion in both 3.3V and 5V systems. With a fan-out capability of 7.8mA, it can drive LEDs and other moderate loads. Its wide temperature range and standard 20-SOIC package make it suitable for a variety of industrial and consumer applications, including bus interfacing and signal conditioning.
- Wide 2V to 6V Supply Range: Ensures compatibility with both 3.3V and 5V logic systems, simplifying mixed-voltage design.
- 3-State Outputs: Enables bus-oriented applications by allowing outputs to be disabled, preventing bus contention.
- Inverting Buffer Function: Provides signal inversion and buffering in a single IC, reducing component count.
- Wide Operating Temperature Range (-55°C to 125°C): Suitable for demanding industrial and automotive environments.
Bus Interfacing and Isolation
Use the MC74HC240AFL2 to buffer and invert address or data lines between different logic blocks. The 3-State outputs allow multiple devices to share a common bus without contention, as the outputs can be placed in a high-impedance state when not in use.
Signal Inversion and Level Shifting
With a wide 2V to 6V supply range, this buffer can act as a simple level shifter. By powering the IC at the target voltage, it can translate signals from a 3.3V microcontroller to a 5V peripheral, while also inverting the logic level as needed.
Driving LEDs and Indicator Lamps
The 7.8mA output current is sufficient to directly drive standard LEDs with a series resistor. The inverting function simplifies active-low indicator circuits, where an LED is turned on when the input is low.
Clock and Control Signal Buffering
Buffering clock signals or control lines with the MC74HC240AFL2 helps to regenerate weak signals and drive multiple loads. This reduces signal degradation and ensures reliable operation in complex digital systems.
Memory Address Decoding
In microprocessor systems, this buffer can be used to invert and buffer address lines before they reach memory or peripheral chips. The 3-State outputs are essential for memory expansion, allowing multiple memory banks to be selected and isolated.
Industrial Control Input/Output
In industrial control systems, this IC can buffer and invert sensor signals or control outputs. Its wide temperature range (-55°C to 125°C) ensures reliable operation in harsh environments, and the 3-State outputs allow for safe connection to shared control buses.
- Q: What is the logic family of the MC74HC240AFL2?
- A: It belongs to the 74HC (High-Speed CMOS) logic family, offering a good balance of speed and power efficiency.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, designed to invert and buffer digital signals while providing high drive current.
- Q: What type of output does it have?
- A: It features 3-State outputs, allowing the outputs to be disabled (high-impedance) for bus-oriented applications.
- Q: What is the operating voltage range?
- A: The MC74HC240AFL2 operates over a wide voltage range of 2V to 6V, making it compatible with both 3.3V and 5V systems.
- Q: What is the package type?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) surface-mount package.
- Q: What is the output current capability?
- A: It can source and sink 7.8mA of current per output, suitable for driving LEDs and other moderate loads.
MC74HC240AFL2.pdf
- Q: What is the logic family of the MC74HC240AFL2?
- A: It belongs to the 74HC (High-Speed CMOS) logic family, offering a good balance of speed and power efficiency.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, designed to invert and buffer digital signals while providing high drive current.
- Q: What type of output does it have?
- A: It features 3-State outputs, allowing the outputs to be disabled (high-impedance) for bus-oriented applications.
- Q: What is the operating voltage range?
- A: The MC74HC240AFL2 operates over a wide voltage range of 2V to 6V, making it compatible with both 3.3V and 5V systems.
- Q: What is the package type?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) surface-mount package.
- Q: What is the output current capability?
- A: It can source and sink 7.8mA of current per output, suitable for driving LEDs and other moderate loads.