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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74HC |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Transceiver, Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PDIP |
| ROHS |  |
The CD74HC640E from Texas Instruments is a versatile inverting transceiver operating from 2V to 6V. It features one channel with 3-State outputs, enabling bidirectional data flow with signal inversion. With a 7.8mA output current, it can drive standard logic loads effectively. The 20-DIP package is ideal for through-hole prototyping and legacy designs. This IC is well-suited for level shifting, bus interfacing, and signal inversion in both 3.3V and 5V systems.
- Wide 2V to 6V Supply Range: Compatible with both 3.3V and 5V logic, simplifying mixed-voltage designs.
- Inverting Function: Provides signal inversion and buffering in a single component, saving board space.
- 3-State Outputs: Enables bus sharing and prevents data contention in multi-device systems.
- Extended Temperature Range (-55°C to 125°C): Suitable for harsh automotive and industrial environments.
5V and 3.3V Level Shifting
The CD74HC640E's wide 2V to 6V supply range allows it to interface between 5V legacy logic and 3.3V microcontrollers. The inverting function can be used to correct signal polarity when needed.
Bus Transceiver for Microprocessor Systems
In a classic microprocessor system, this IC can serve as a bidirectional bus driver, allowing data to flow in both directions on a shared bus. The 3-State outputs are essential for bus arbitration.
Signal Inversion and Buffering
When a system requires an inverted signal with additional drive strength, this transceiver can perform both functions simultaneously, simplifying the design.
Industrial Control Logic
In industrial environments with 5V PLCs, this IC can buffer and invert control signals, providing robust signal transmission over longer distances.
Test Equipment Interfaces
For bench test equipment, it can be used to interface between different logic standards, providing the necessary level shifting and signal conditioning.
Automotive Electronics
With its wide temperature range (-55°C to 125°C), it is suitable for automotive applications where 5V logic is still prevalent, such as sensor interfaces.
- Q: What is the logic family of the CD74HC640E?
- A: It is part of the 74HC (High-Speed CMOS) family, offering a balance of speed and power.
- Q: What is the function of this IC?
- A: It is an inverting transceiver with 1 channel, used for bidirectional data transfer with signal inversion.
- Q: What is the output type?
- A: It features 3-State outputs, enabling bus sharing and isolation.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with both 3.3V and 5V systems.
- Q: What is the output current?
- A: It can source or sink 7.8mA, suitable for standard logic loads.
- Q: What is the package type?
- A: It comes in a 20-DIP (Dual In-line Package) with a 0.300" width.
CD74HC640E.pdf
- Q: What is the logic family of the CD74HC640E?
- A: It is part of the 74HC (High-Speed CMOS) family, offering a balance of speed and power.
- Q: What is the function of this IC?
- A: It is an inverting transceiver with 1 channel, used for bidirectional data transfer with signal inversion.
- Q: What is the output type?
- A: It features 3-State outputs, enabling bus sharing and isolation.
- Q: What is the operating voltage range?
- A: It operates from 2V to 6V, making it compatible with both 3.3V and 5V systems.
- Q: What is the output current?
- A: It can source or sink 7.8mA, suitable for standard logic loads.
- Q: What is the package type?
- A: It comes in a 20-DIP (Dual In-line Package) with a 0.300" width.