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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 | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC (0.295", 7.50mm Width) |
The CD74FCT640TM is a high-speed, non-inverting octal bus transceiver from Harris Corporation. Designed for 5V systems, it features 3-state outputs and can source 15mA or sink 64mA, making it suitable for driving demanding bus loads. Its single-channel, 8-bit architecture is ideal for bidirectional data flow in microprocessor and memory systems. The 20-SOIC package is compact for space-constrained PCBs, and the wide operating temperature range ensures reliability in industrial environments.
- High Drive Capability: Sinks up to 64mA, enabling direct connection to high-capacitance buses without additional buffers.
- 3-State Outputs: Allows multiple devices to share the same data lines safely, preventing bus conflicts.
- Wide Temperature Range: Operates from -40°C to 85°C, suitable for harsh industrial environments.
- Non-Inverting Logic: Simplifies design by preserving signal polarity, reducing debugging time.
Bus Interface for Microprocessors
Use the CD74FCT640TM to create a bidirectional interface between a microprocessor data bus and memory or peripheral devices. The 3-state outputs prevent bus contention when multiple devices share the same lines.
Signal Buffering for High-Capacitance Loads
This transceiver can drive heavy capacitive loads (up to 64mA sink current) without signal degradation, making it ideal for buffering address or data lines in large systems.
Level Shifting in Mixed-Voltage Systems
While designed for 5V operation, the high-impedance inputs and robust outputs allow it to interface with 3.3V logic when pull-up resistors are used, enabling simple level adaptation.
Data Acquisition Systems
In industrial data acquisition, this IC can route analog-to-digital converter outputs to a processing unit, ensuring clean, buffered data transfer over longer PCB traces.
Telecommunications Switching
Use it in telecom line cards to switch and buffer control signals between backplane and line interface modules, benefiting from its fast propagation delay and 3-state isolation.
Test and Measurement Equipment
In automated test equipment, the transceiver can multiplex test signals to different measurement points, providing reliable signal integrity across a wide temperature range (-40°C to 85°C).
- Q: What is the logic family of the CD74FCT640TM?
- A: This device belongs to the CD74FCT family, a high-speed CMOS logic series.
- Q: What is the function of this IC?
- A: It is a non-inverting octal bus transceiver with 3-state outputs.
- Q: How many channels does it have?
- A: It has 1 channel (8-bit bus width).
- Q: What is the output type?
- A: The outputs are 3-State, allowing for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V.
- Q: What package is available?
- A: It comes in a 20-SOIC package (0.295", 7.50mm Width).
CD74FCT640TM.pdf
- Q: What is the logic family of the CD74FCT640TM?
- A: This device belongs to the CD74FCT family, a high-speed CMOS logic series.
- Q: What is the function of this IC?
- A: It is a non-inverting octal bus transceiver with 3-state outputs.
- Q: How many channels does it have?
- A: It has 1 channel (8-bit bus width).
- Q: What is the output type?
- A: The outputs are 3-State, allowing for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates from 4.75V to 5.25V.
- Q: What package is available?
- A: It comes in a 20-SOIC package (0.295", 7.50mm Width).