DS26LS31CMX/NOPB

Overview

The DS26LS31CMX/NOPB is a quad high-speed differential line driver manufactured by National Semiconductor, now part of Texas Instruments. It provides unipolar differential drive to twisted-pair or parallel-wire transmission lines and meets EIA Standard RS-422 requirements. The device features TRI-STATE outputs and a common enable/disable function for all four drivers. It operates within a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 30 Mb/s. The component is housed in an SOIC-16 package and functions across an industrial temperature range of -55 °C to +125 °C.

Feature Summary

• Provides quad differential line driving capability compliant with RS-422 standards
• Features TRI-STATE outputs with a unified enable and disable control
• Designed for high-speed digital data transmission over balanced lines

Applications

• Digital data transmission over balanced twisted-pair lines
• Parallel-wire transmission line interfaces
• Systems requiring RS-422 compliant differential signaling

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as the brand transition occurred during production. Confirm the NOPB suffix indicates lead-free compliance and RoHS adherence. Ensure the SOIC-16 package type matches the design requirements. Validate the operating temperature range against specific environmental constraints before procurement.

Selection Notes

Select this component when a quad differential driver is required for RS-422 applications. Consider the 30 Mb/s data rate capability and the wide industrial temperature range. Verify that the 5 V supply voltage aligns with the system power architecture. Ensure the TRI-STATE output functionality is necessary for bus sharing or multi-driver configurations.

Part Context

This device belongs to the DS26LS31 family of quad high-speed differential line drivers. It shares functional similarities with other RS-422 transmitters but is distinguished by its specific package and manufacturing origin. The product line is designed for robust digital communication in noisy environments.

Replacement Considerations

Compatible substitutes include the DS26LS31CM and DS26LS31MX variants from the same family. Other RS-422 quad drivers such as the AM26LS31 may serve as alternatives if pin compatibility and electrical specifications are verified.