Overview
The SN74LS640NSR is a high-performance octal bus transceiver manufactured by Texas Instruments. This component is designed for asynchronous bidirectional communication between data buses, making it ideal for applications requiring efficient data transfer and isolation. It is part of the SN74LS640 series and is widely used in industrial, automotive, and consumer electronics due to its reliability and versatility. Its market positioning targets engineers and designers seeking robust solutions for data bus management, with its unique selling points being its high-speed performance, low power consumption, and compact SO-20 package.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Function | Bus Transceiver | - | Octal bus transceiver |
| Logic Family | LS | - | TTL input/output levels |
| Output Type | 3-State/Open Collector | - | - |
| High-Level Output Current | -15 | mA | - |
| Low-Level Output Current | 24 | mA | - |
| Propagation Delay Time | 15 | ns | - |
| Supply Voltage | 4.75 to 5.25 | V | - |
| Operating Temperature | 0 to +70 | °C | - |
| Package | SO-20 | - | Surface mount |
| Number of Channels | 8 | - | - |
| Polarity | Inverting | - | - |
| Dimensions | 12.6 x 5.3 x 1.95 | mm | Length x Width x Height |
Key Features
- High-Speed Performance: With a propagation delay of 15 ns, it ensures efficient data transfer in time-critical applications.
- Bidirectional Communication: Supports asynchronous data flow between two buses, enhancing flexibility in system design.
- 3-State Outputs: Allows for effective bus isolation when the device is disabled, reducing power consumption and improving system efficiency.
- Compact Design: The SO-20 package is ideal for space-constrained applications.
- Wide Operating Temperature Range: Suitable for use in harsh environments, including industrial and automotive applications.
Applications
The SN74LS640NSR is widely used in various fields, including:
- Industrial Automation: Facilitates efficient data transfer between controllers and peripherals in automated systems.
- Automotive Electronics: Ensures reliable communication in vehicle control systems and infotainment networks.
- Consumer Electronics: Used in devices requiring high-speed data bus management, such as gaming consoles and smart home systems.
- Communication Systems: Supports data routing and isolation in networking equipment and telecommunication devices.
Q & A
1. What is the function of the SN74LS640NSR?
The SN74LS640NSR is an octal bus transceiver designed for bidirectional asynchronous communication between data buses.
2. What is the operating voltage range of this component?
The operating voltage range is 4.75 V to 5.25 V.
3. What is the propagation delay time?
The propagation delay time is 15 ns.
4. Is the SN74LS640NSR RoHS compliant?
Yes, it is RoHS compliant.
5. What is the output type of this transceiver?
The output type is 3-State/Open Collector.
6. What is the maximum operating temperature?
The maximum operating temperature is +70°C.
7. What package does the SN74LS640NSR use?
It uses an SO-20 surface-mount package.
8. How many channels does this transceiver support?
It supports 8 channels.
9. What is the polarity of the SN74LS640NSR?
It has inverting polarity.
10. What are the typical applications of this component?
Typical applications include industrial automation, automotive electronics, consumer electronics, and communication systems.
