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| Product attributes | Property Value |
| Manufacturer | Renesas Electronics Corporation |
| Product Series | 74FCT |
| Packaging | | |
| Part Status | Obsolete |
| 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-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC |
| ROHS |  |
The 74FCT540ATSOG is a high-speed inverting buffer from IDT, designed for 5V systems. It operates from 4.75V to 5.25V and provides 3-State outputs for bus-oriented applications. With 15mA source and 64mA sink current capability, it can drive heavy loads while maintaining signal integrity. The single-channel configuration is ideal for critical signal paths requiring inversion and buffering. Its 20-SOIC package is compact for space-constrained designs. Typical applications include memory buffering, bus isolation, and control signal inversion in industrial and automotive electronics.
- High Drive Current (64mA Sink): Drives heavy capacitive loads and relays directly, reducing need for external drivers.
- 3-State Outputs: Enables bus sharing and multiplexing without signal contention, simplifying system design.
- Wide Temperature Range (-40°C to 85°C): Suitable for harsh automotive and industrial environments.
- Compact SOIC Package: Saves PCB space while maintaining excellent thermal and electrical performance.
Bus Interfacing in Networking Equipment
In networking switches, the 74FCT540ATSOG buffers and inverts control signals between ASICs and PHYs. The 3-State outputs allow multiple line cards to share a common management bus.
Signal Inversion for Motor Control
In motor control units, this buffer inverts PWM signals while providing high drive current. The 64mA sink capability ensures direct driving of optocouplers or gate drivers.
Memory Address Buffering
For high-speed memory systems, the inverting buffer drives address lines with minimal delay. The 15mA source current maintains fast edge rates, crucial for timing-sensitive applications.
Industrial PLC I/O Modules
In PLCs, this IC conditions sensor inputs by inverting and buffering signals. Its wide temperature range ensures reliable operation on the factory floor.
Automotive Infotainment Systems
In infotainment units, the buffer handles signal inversion for display interfaces. The 3-State feature allows safe power-down of unused sections, reducing standby current.
Telecom Line Cards
For telecom equipment, the 74FCT540ATSOG provides robust buffering for alarm and status signals. The inverting function simplifies logic design in complex backplane architectures.
- Q: What is the logic family of the 74FCT540ATSOG?
- A: It belongs to the 74FCT logic family, known for high speed and low power consumption.
- Q: What function does this IC perform?
- A: It is an inverting buffer with 3-State outputs, ideal for signal inversion and bus isolation.
- Q: How many channels does it have?
- A: It has 1 channel, providing a single inverting buffer path.
- Q: What is the output type?
- A: The outputs are 3-State, allowing high-impedance states for shared bus applications.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, suitable for 5V logic systems.
- Q: What package is available?
- A: It is offered in a 20-SOIC (0.295", 7.50mm Width) package.
74FCT540ATSOG.pdf
- Q: What is the logic family of the 74FCT540ATSOG?
- A: It belongs to the 74FCT logic family, known for high speed and low power consumption.
- Q: What function does this IC perform?
- A: It is an inverting buffer with 3-State outputs, ideal for signal inversion and bus isolation.
- Q: How many channels does it have?
- A: It has 1 channel, providing a single inverting buffer path.
- Q: What is the output type?
- A: The outputs are 3-State, allowing high-impedance states for shared bus applications.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, suitable for 5V logic systems.
- Q: What package is available?
- A: It is offered in a 20-SOIC (0.295", 7.50mm Width) package.