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| Product attributes | Property Value |
| Manufacturer | Harris Corporation |
| Product Series | |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 15mA, 64mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 20-SSOP (0.154", 3.90mm Width) |
The CD74FCT540CTQM from Harris Corporation is a high-speed octal inverting buffer with 3-State outputs. It operates from a 4.75V to 5.25V supply, making it a dedicated 5V device. With a sink capability of 64mA and source capability of 15mA, it provides robust drive for demanding applications. The 3-State outputs enable bus-oriented designs. This buffer is ideal for memory address buffering, backplane interfacing, and industrial control systems where high speed and strong drive are required.
- High Output Drive (64mA Sink): Can drive heavy capacitive loads and long bus lines with fast edge rates.
- TTL-Compatible Inputs: Simplifies interfacing with legacy TTL logic.
- 3-State Outputs: Enables safe bus sharing in multi-device systems.
- Octal (8-bit) Configuration: Buffers an entire byte in a single package.
High-Speed Bus Driving
Use the CD74FCT540CTQM to drive high-capacitance bus lines in memory or peripheral interfaces. The 64mA sink capability ensures fast signal transitions even with heavy loads.
Memory Address Buffering
In DRAM or SRAM systems, this octal buffer can invert and buffer address lines, providing the necessary drive strength and isolation from the memory array.
Backplane Interfacing
For multi-board systems, this buffer can drive signals across a backplane, where long traces and multiple connectors require high current drive.
TTL-Compatible Level Shifting
With TTL-compatible inputs, it can interface directly with legacy TTL logic while providing CMOS-level outputs, bridging different logic families.
Industrial Control Outputs
In PLC output modules, this buffer can drive relays or solenoids through external transistors, providing the necessary current and inversion.
Test Equipment Signal Conditioning
In automated test equipment, this buffer can condition and invert control signals, ensuring precise timing and drive capability for various instruments.
- Q: What is the logic family of the CD74FCT540CTQM?
- A: It is part of the 74FCT (Fast CMOS TTL-compatible) family, offering high-speed operation with TTL-compatible inputs.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 1 channel (octal buffer), providing signal inversion and buffering for 8-bit data paths.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for bus-oriented applications with high-impedance control.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it a 5V-only device.
- Q: What is the output current capability?
- A: It can sink 64mA and source 15mA per output, providing strong drive for heavy loads.
- Q: What is the operating temperature range?
- A: It is rated for 0°C to 70°C, suitable for commercial applications.
CD74FCT540CTQM.pdf
- Q: What is the logic family of the CD74FCT540CTQM?
- A: It is part of the 74FCT (Fast CMOS TTL-compatible) family, offering high-speed operation with TTL-compatible inputs.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 1 channel (octal buffer), providing signal inversion and buffering for 8-bit data paths.
- Q: What is the output type?
- A: The outputs are 3-State, allowing for bus-oriented applications with high-impedance control.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it a 5V-only device.
- Q: What is the output current capability?
- A: It can sink 64mA and source 15mA per output, providing strong drive for heavy loads.
- Q: What is the operating temperature range?
- A: It is rated for 0°C to 70°C, suitable for commercial applications.