26LS31/B2A

Overview

The DS26LS31/B2A is a quad differential line driver manufactured by Rochester Electronics, LLC. It is designed for digital data transmission over balanced lines and complies with EIA-422 and FED STD 1020 standards. The device features four independent drivers within a single package. It operates on a bipolar process technology and utilizes a CDFP16 ceramic dual in-line flat package (DFP) with 16 pins. The component supports a maximum operating temperature of 125 °C and includes differential output capabilities. It accepts standard input characteristics to drive RS-422 compatible loads.

Feature Summary

• Quad differential line driver architecture supporting four independent channels
• Compliance with EIA-422 and FED STD 1020 interface standards
• Robust ceramic packaging suitable for high-temperature environments up to 125 °C
• Bipolar technology implementation for reliable signal transmission

Applications

• Digital data transmission systems requiring RS-422 compliance
• Industrial communication interfaces utilizing balanced lines
• Military or aerospace avionics systems demanding high thermal stability
• Legacy system maintenance where original specifications are required

Procurement Notes

Verify the specific suffix /B2A against official Rochester Electronics documentation to confirm exact binning, testing levels, or revision status. Ensure the CDFP16 ceramic package matches the target board layout. Confirm lead content and RoHS non-compliance status aligns with regulatory requirements for the intended deployment environment before finalizing procurement orders.

Selection Notes

Select this component when a quad differential driver meeting EIA-422 standards is required in a hermetic ceramic package. The 125 °C maximum operating temperature makes it suitable for harsh environments. Verify that the bipolar input/output characteristics match the system logic levels. Consider the 16-pin DFP footprint during PCB design to ensure mechanical compatibility with existing connectors or sockets.

Part Context

Rochester Electronics specializes in sustaining legacy semiconductor products that are no longer actively produced by original manufacturers. This part belongs to the AMD/National Semiconductor 26LS3x family of RS-422 transceivers. The company provides continued production through licensed manufacturing and extensive wafer banks, ensuring availability for long-life applications without redesigning the underlying silicon architecture.

Replacement Considerations

Direct pin-to-pin replacements may include other 26LS31 variants from different manufacturers if package and electrical parameters match. Verify that any substitute maintains the same bipolar input characteristics and CDFP16 footprint. Cross-reference datasheets to ensure EIA-422 compliance and thermal ratings are equivalent or superior.