Texas Instruments

SN74LS642NSR  

Buffers, Drivers, Receivers, Transceivers

SN74LS642NSR Description

The SN74LS642NSR from Texas Instruments is a high-performance 8-bit inverting transceiver designed for bidirectional data communication between buses. Operating within a 4.75V to 5.25V supply range, this IC is part of the 74LS series, known for its reliability in TTL logic applications. The device features open-collector outputs, enabling flexible interfacing with other logic families or higher-voltage systems. Packaged in a 20-pin SOIC (Surface Mount) and available in Tape & Reel (TR), it is optimized for automated assembly processes. With an operating temperature range of 0°C to 70°C, it is suitable for commercial-grade applications.

SN74LS642NSR Features

• Logic Type: Inverting transceiver for bidirectional data flow with signal inversion.
• Output Type: Open-collector outputs allow wired-OR connections and easy interfacing with higher voltages.
• Voltage Supply: Compatible with standard 5V TTL logic levels (4.75V–5.25V).
• Package: 20-pin SOIC (Surface Mount), RoHS3 compliant, and REACH unaffected.
• Performance: Low-power Schottky (LS) technology ensures fast switching speeds while minimizing power consumption.
• Reliability: Moisture Sensitivity Level (MSL) 1 (Unlimited), making it suitable for extended storage and handling.

SN74LS642NSR Applications

• Bus Interface Systems: Ideal for bidirectional data transfer in microprocessor/microcontroller-based systems.
• Industrial Control: Used in PLCs and automation systems where signal inversion and open-collector flexibility are required.
• Communication Equipment: Facilitates level shifting and buffering in serial/parallel data transmission.
• Embedded Systems: Suitable for interfacing between TTL logic and higher-voltage peripherals.
• Automotive Electronics: Employed in non-critical automotive control modules due to its robust design.

Conclusion of SN74LS642NSR

The SN74LS642NSR is a versatile 8-bit inverting transceiver offering reliable performance in bidirectional data communication. Its open-collector outputs and 5V TTL compatibility make it a preferred choice for interfacing applications. With low power consumption, surface-mount packaging, and commercial-grade temperature tolerance, it is well-suited for industrial, embedded, and communication systems. Texas Instruments' reputation for quality ensures this IC meets stringent performance and reliability standards.

SN74LS642NSR Documents

Download datasheets and manufacturer documentation for SN74LS642NSR

Datasheets :

SN54LS640-42/644-45, SN74LS640-42/644-45      

PCN Packaging :

20L SOP 29/Sep/2016      

HTML Datasheet :

SN54LS640-42/644-45, SN74LS640-42/644-45