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| Product attributes | Property Value |
| Manufacturer | Harris Corporation |
| Product Series | |
| 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 | Surface Mount |
| Package / Case | 24-SSOP (0.209", 5.30mm Width) |
| Supplier Device Package | 24-SSOP (0.209", 5.30mm Width) |
The CD74FCT646SM is a non-inverting transceiver from Harris Corporation, part of the 74FCT logic family. It features a single channel with 3-State outputs, enabling bidirectional data flow. Operating from 4.75V to 5.25V, it delivers 64mA sink and 15mA source current. The 24-pin SSOP package is compact for space-constrained designs. This transceiver is ideal for 5V bus interfacing, memory buffering, and backplane communication.
- High Sink Current (64mA): Drives heavy bus loads and multiple inputs.
- Bidirectional Operation: Reduces component count in data bus applications.
- 3-State Outputs: Allows bus sharing and isolation.
- Fast 74FCT Technology: Ensures low propagation delay for high-speed systems.
Bidirectional Bus Transceiver
Use the CD74FCT646SM for bidirectional data transfer between two 5V buses. The 3-State outputs and direction control allow seamless data flow in both directions.
Memory Data Bus Buffering
Interface a microprocessor to a memory array, providing high sink current (64mA) to drive multiple memory chips.
Backplane Communication
In telecom or industrial backplanes, this transceiver buffers signals between cards, ensuring robust communication over long traces.
Level Shifting (5V to 5V)
While not a level shifter, it provides signal regeneration and isolation between 5V logic blocks, improving noise margins.
Peripheral Device Interface
Connect a microcontroller to peripherals like LCDs or sensors, using the transceiver to buffer and control data direction.
Test and Measurement Systems
Use it in automated test equipment to route signals between the DUT and measurement instruments, with high drive capability.
- Q: What is the logic family of the CD74FCT646SM?
- A: It is from the 74FCT family, known for fast, low-power CMOS operation.
- Q: What is the function of this IC?
- A: It is a single-channel non-inverting transceiver with 3-State outputs.
- Q: What voltage does it support?
- A: It operates from 4.75V to 5.25V, ideal for 5V systems.
- Q: What is the output current?
- A: It can sink 64mA and source 15mA.
- Q: What package is available?
- A: It comes in a 24-pin SSOP (0.209", 5.30mm width) package.
- Q: What is the temperature range?
- A: It operates from 0°C to 70°C.
CD74FCT646SM.pdf
- Q: What is the logic family of the CD74FCT646SM?
- A: It is from the 74FCT family, known for fast, low-power CMOS operation.
- Q: What is the function of this IC?
- A: It is a single-channel non-inverting transceiver with 3-State outputs.
- Q: What voltage does it support?
- A: It operates from 4.75V to 5.25V, ideal for 5V systems.
- Q: What is the output current?
- A: It can sink 64mA and source 15mA.
- Q: What package is available?
- A: It comes in a 24-pin SSOP (0.209", 5.30mm width) package.
- Q: What is the temperature range?
- A: It operates from 0°C to 70°C.