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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 | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 20-SO |
| ROHS |  |
The SN74HC640NS is a high-speed inverting transceiver from the 74HC logic family. It features 3-State outputs and operates over a wide 2V to 6V supply range, with 7.8mA output current per channel. This 20-SOIC device is ideal for bus-oriented systems, signal buffering, and level shifting in industrial and consumer electronics.
- Wide 2V to 6V Supply Range: Compatible with 3.3V and 5V systems, simplifying mixed-voltage design.
- 3-State Outputs: Enables bus sharing without signal contention.
- Inverting Function: Useful for active-low bus protocols and signal inversion.
- Broad Temperature Range (-40°C to 85°C): Suitable for industrial environments.
Bus Interfacing in Mixed-Voltage Systems
The SN74HC640NS with 3-State outputs allows multiple devices to share a common data bus without contention. Its inverting function is useful for active-low bus protocols.
Signal Buffering for Long PCB Traces
With 7.8mA sink/source capability, this transceiver can drive capacitive loads on long traces, reducing signal degradation in high-speed digital designs.
Level Shifting Between 3.3V and 5V Logic
Operating from 2V to 6V, it can interface between different voltage domains, making it ideal for mixed-voltage systems.
Industrial Control Logic
Wide supply range and -40°C to 85°C temperature tolerance suit factory automation and PLC I/O modules.
Memory Address/Data Buffering
3-State outputs enable efficient memory bus isolation, preventing data corruption during read/write cycles.
Automotive ECU Communication
Robust 74HC logic handles noisy automotive environments, buffering sensor data to the main controller.
- Q: What is the logic family of the SN74HC640NS?
- A: It belongs to the 74HC family, operating from 2V to 6V.
- Q: What is the function of this IC?
- A: It is an inverting 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: 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: 2V to 6V supply voltage.
- Q: What package is available?
- A: 20-SOIC (0.209", 5.30mm Width).
SN74HC640NS.pdf
- Q: What is the logic family of the SN74HC640NS?
- A: It belongs to the 74HC family, operating from 2V to 6V.
- Q: What is the function of this IC?
- A: It is an inverting 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: 3-State outputs for bus-oriented applications.
- Q: What is the voltage range?
- A: 2V to 6V supply voltage.
- Q: What package is available?
- A: 20-SOIC (0.209", 5.30mm Width).