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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 | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 24-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 24-SSOP (0.154", 3.90mm Width) |
The CD74FCT2646ATQM from Harris Corporation is a high-speed, non-inverting transceiver in the 74FCT logic family. It features one channel with 3-State outputs, capable of sinking 15mA and sourcing 64mA. Operating from 4.75V to 5.25V, this transceiver is designed for bidirectional bus communication in 5V systems. Its fast propagation delay and high drive current make it ideal for memory interfaces, backplane communication, and industrial control. The 24-SSOP package offers a compact footprint for space-limited applications.
- High Source Current (64mA): Drives heavily loaded buses and long cables, ensuring signal integrity in demanding applications.
- Bidirectional Capability: Simplifies bus design by allowing data flow in both directions with a single IC, reducing component count.
- Fast Propagation Delay: The 74FCT family is optimized for speed, making it suitable for high-frequency data transfer.
- Wide Temperature Range (-40°C to 85°C): Reliable operation in industrial environments with temperature extremes.
Bidirectional Bus Transceivers
Use the CD74FCT2646ATQM to connect two data buses in a 5V system, allowing data flow in either direction. The 3-State outputs and direction control enable efficient bus sharing between multiple peripherals.
Memory Interface for High-Speed Controllers
In systems with fast microprocessors, this transceiver provides the necessary drive strength (64mA source) to handle high-capacitance memory buses, ensuring reliable read/write operations without signal degradation.
Backplane Communication in Telecom Equipment
For telecom racks, this transceiver buffers signals between line cards and the backplane. The 15mA sink capability is sufficient for terminated backplane traces, while the 3-State outputs allow hot-swapping of cards.
Data Acquisition Systems
In multi-channel data acquisition, the transceiver can route data from multiple ADC/DAC devices to a single processor bus. The fast propagation delay of the 74FCT family minimizes data latency.
Industrial Control Bus Isolation
Use this transceiver to interface a PLC's internal bus to external I/O modules. The wide temperature range (-40°C to 85°C) ensures operation in factory floor environments, while the 3-State outputs prevent bus conflicts.
Test and Measurement Equipment
In automated test equipment, the transceiver can switch between different measurement modules. The high source current (64mA) drives long cables, maintaining signal integrity over distances.
- Q: What is the logic family of the CD74FCT2646ATQM?
- A: It belongs to the 74FCT logic family, offering fast propagation delays and low power consumption.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel, enabling bidirectional data transfer between two buses.
- Q: What is the output type?
- A: The outputs are 3-State, allowing the transceiver to be isolated from the bus when not active.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it suitable for standard 5V systems with tight regulation.
- Q: What is the output current capability?
- A: It can sink 15mA and source 64mA, providing asymmetric drive for specific bus requirements.
- Q: What package is available?
- A: It comes in a 24-SSOP (0.154", 3.90mm Width) package, ideal for compact surface-mount designs.
CD74FCT2646ATQM.pdf
- Q: What is the logic family of the CD74FCT2646ATQM?
- A: It belongs to the 74FCT logic family, offering fast propagation delays and low power consumption.
- Q: What is the function of this IC?
- A: It is a non-inverting transceiver with 1 channel, enabling bidirectional data transfer between two buses.
- Q: What is the output type?
- A: The outputs are 3-State, allowing the transceiver to be isolated from the bus when not active.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V, making it suitable for standard 5V systems with tight regulation.
- Q: What is the output current capability?
- A: It can sink 15mA and source 64mA, providing asymmetric drive for specific bus requirements.
- Q: What package is available?
- A: It comes in a 24-SSOP (0.154", 3.90mm Width) package, ideal for compact surface-mount designs.