Texas Instruments

SN74LS642NSR

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.