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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | 74FCT |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Transceiver, Non-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 | Through Hole |
| Package / Case | 24-CDIP |
| Supplier Device Package | 24-CDIP |
The 74FCT543ASPC is a high-speed, non-inverting transceiver from National Semiconductor's 74FCT family. It features 3-State outputs and a single 8-bit channel, operating from a 4.75V to 5.25V supply. With 15mA source and 64mA sink current capability, it can drive heavily loaded buses. The 24-CDIP package suits through-hole assembly. Ideal for 5V bus interfacing, memory driving, and industrial control applications.
- High Sink Current (64mA): Drives long bus lines and high-capacitance loads without signal degradation.
- 3-State Outputs: Allows multiple devices to share a bus safely, preventing data corruption.
- Non-Inverting Logic: Preserves signal polarity, simplifying design and debugging.
- Wide 5V Supply Range (4.75V-5.25V): Compatible with standard 5V TTL systems.
5V Bus Interfacing
Use the 74FCT543ASPC to interface between two 5V buses in legacy systems. Its 3-State outputs prevent bus contention and allow multiple devices to share the same data lines.
Bidirectional Data Buffering
In microprocessor systems, this transceiver buffers address or data lines, providing high drive current (64mA sink) to handle capacitive loads on long PCB traces.
Memory Array Driving
Drive SRAM or DRAM address lines with the 74FCT543A. The non-inverting function preserves signal integrity, while 3-State outputs allow memory bank selection.
Industrial Control Logic
In PLCs and industrial controllers, this IC buffers signals between logic controllers and high-current peripherals, ensuring reliable 5V logic levels.
Test Equipment Signal Routing
For automated test equipment, the transceiver can route test vectors to different device-under-test pins, with 3-State control for isolation.
Telecom Line Cards
Buffer control and data signals in telecom line cards, where the 0°C to 70°C temperature range covers typical indoor environments.
- Q: What is the logic family of the 74FCT543ASPC?
- A: It belongs to the 74FCT logic family, known for high-speed, low-power operation.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 3-State outputs, allowing bidirectional data flow.
- Q: How many channels does it have?
- A: It has 1 channel (8-bit) for data transmission.
- Q: What is the output type?
- A: The outputs are 3-State, enabling bus isolation when disabled.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it suitable for 5V systems.
- Q: What package is available?
- A: It comes in a 24-CDIP (Ceramic Dual In-line Package).
74FCT543ASPC.pdf
- Q: What is the logic family of the 74FCT543ASPC?
- A: It belongs to the 74FCT logic family, known for high-speed, low-power operation.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 3-State outputs, allowing bidirectional data flow.
- Q: How many channels does it have?
- A: It has 1 channel (8-bit) for data transmission.
- Q: What is the output type?
- A: The outputs are 3-State, enabling bus isolation when disabled.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it suitable for 5V systems.
- Q: What package is available?
- A: It comes in a 24-CDIP (Ceramic Dual In-line Package).