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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 | -40°C ~ 85°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 CD74FCT540TQM is an inverting octal buffer from Harris Corporation, designed for high-speed 5V logic systems. It features 3-state outputs and can sink 64mA, providing excellent drive for bus lines. The 20-SSOP package saves board space while maintaining full 8-bit functionality. With a wide operating temperature range, it is suitable for industrial and automotive applications where signal inversion and buffering are required.
- Inverting Function: Provides logic inversion without extra components, simplifying active-low bus designs.
- High Sink Current: 64mA sink capability drives low-impedance loads and long cables effectively.
- Compact SSOP Package: Reduces PCB footprint by 40% compared to SOIC, ideal for dense layouts.
- Extended Temperature Range: -40°C to 85°C ensures reliable operation in extreme conditions.
Inverting Bus Buffering
Use the CD74FCT540TQM to invert and buffer address or control signals in microprocessor systems. The 3-state outputs allow multiple sources to drive the same bus without contention.
Memory Address Decoding
In memory subsystems, this buffer can invert and drive address lines to DRAM or SRAM arrays, ensuring proper signal levels and timing across long traces.
Industrial Control Logic
For PLCs and industrial controllers, this IC provides robust signal buffering for sensor inputs, with the inverting function useful for active-low logic conventions.
Data Communication Interfaces
In serial communication modules, it can buffer and invert control signals like RTS/CTS, improving signal integrity over cable runs.
Test Equipment Signal Conditioning
In benchtop test gear, the buffer can condition and invert trigger signals, providing clean, isolated outputs to measurement instruments.
Automotive ECU Signal Buffering
With a -40°C to 85°C range, it suits automotive engine control units for buffering and inverting sensor signals in harsh thermal environments.
- Q: What is the logic family of the CD74FCT540TQM?
- A: It is part of the CD74FCT high-speed CMOS logic family.
- Q: What function does this IC perform?
- A: It is an inverting octal buffer with 3-state outputs.
- Q: How many channels are available?
- A: It has 1 channel (8-bit width).
- Q: What is the output type?
- A: The outputs are 3-State, ideal for multiplexed bus applications.
- Q: What is the supply voltage range?
- A: It operates between 4.75V and 5.25V.
- Q: What package is this offered in?
- A: It comes in a 20-SSOP package (0.154", 3.90mm Width).
CD74FCT540TQM.pdf
- Q: What is the logic family of the CD74FCT540TQM?
- A: It is part of the CD74FCT high-speed CMOS logic family.
- Q: What function does this IC perform?
- A: It is an inverting octal buffer with 3-state outputs.
- Q: How many channels are available?
- A: It has 1 channel (8-bit width).
- Q: What is the output type?
- A: The outputs are 3-State, ideal for multiplexed bus applications.
- Q: What is the supply voltage range?
- A: It operates between 4.75V and 5.25V.
- Q: What package is this offered in?
- A: It comes in a 20-SSOP package (0.154", 3.90mm Width).