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| Product attributes | Property Value |
| Manufacturer | Fairchild Semiconductor |
| Product Series | 74F |
| 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 | 15mA, 12mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 28-LCC (J-Lead) |
| Supplier Device Package | 28-PLCC (11.51x11.51) |
The 74F2240QCX is a high-speed inverting buffer from Fairchild Semiconductor, designed for 5V systems. Operating from 4.5V to 5.5V, it provides 15mA source and 12mA sink current. The 3-State outputs enable bus sharing, while the 74F logic family delivers fast propagation delays. Housed in a 28-LCC package, this buffer is ideal for high-speed signal inversion, bus isolation, and control logic applications.
- High-Speed Operation: The 74F family provides fast propagation delays for time-critical applications.
- 3-State Outputs: Allows multiple devices to share a bus without contention.
- Inverting Function: Simplifies active-low logic design without extra components.
- Moderate Drive Strength (15mA/12mA): Suitable for driving standard logic loads and LEDs.
High-Speed Data Bus Inversion
The 74F family's fast propagation delay makes this buffer ideal for inverting data lines in high-speed digital systems, such as memory controllers and communication interfaces.
Signal Inversion in Control Logic
When active-low control signals are needed, this inverting buffer converts standard logic levels without additional gates, simplifying PCB layout.
Bus Isolation in Telecommunications
The 3-State outputs allow this buffer to isolate telecommunication line cards from the main backplane, preventing electrical interference during hot-swapping.
LED Driving with Inverted Logic
For active-low LED indicators, this buffer can directly drive LEDs with its 15mA source capability, eliminating the need for external transistors.
Industrial Control Signal Conditioning
In factory automation, this buffer inverts and conditions signals from sensors, ensuring clean logic levels for PLC inputs.
Memory Read/Write Signal Buffering
The fast switching speed makes it suitable for buffering read/write control signals in SRAM and DRAM interfaces, reducing timing skew.
- Q: What is the logic family of the 74F2240QCX?
- A: It belongs to the 74F (Fast) logic family, known for high-speed bipolar performance.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, providing signal inversion and buffering.
- Q: What is the output type?
- A: It features 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, compatible with standard 5V logic.
- Q: What is the output current capability?
- A: It can source 15mA and sink 12mA, providing moderate drive strength.
- Q: What package is available?
- A: It comes in a 28-LCC (J-Lead) package, suitable for surface-mount designs.
74F2240QCX.pdf
- Q: What is the logic family of the 74F2240QCX?
- A: It belongs to the 74F (Fast) logic family, known for high-speed bipolar performance.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, providing signal inversion and buffering.
- Q: What is the output type?
- A: It features 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: It operates from 4.5V to 5.5V, compatible with standard 5V logic.
- Q: What is the output current capability?
- A: It can source 15mA and sink 12mA, providing moderate drive strength.
- Q: What package is available?
- A: It comes in a 28-LCC (J-Lead) package, suitable for surface-mount designs.