26LS32JC

Overview

The Rochester Electronics LLC 26LS32JC is a quad differential line receiver designed for RS-422 and RS-485 communication standards. It features four independent receivers with high input impedance and low output drive current, ensuring reliable data transmission over long distances in noisy environments. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 10 Mb/s. It is available in a 16-pin DIP package and is rated for industrial temperature ranges, providing robust performance for legacy system maintenance and replacement.

Feature Summary

• Quad differential receiver architecture supporting RS-422/RS-485 protocols
• High noise immunity with Schmitt-trigger inputs for clean signal regeneration
• Low power consumption with standby current specifications suitable for battery-operated systems

Applications

• Industrial control networks requiring RS-422 multi-drop communication
• Legacy telecommunications equipment maintenance and repair
• Data acquisition systems in harsh electromagnetic interference environments

Procurement Notes

Verify the specific suffix 'JC' against the original manufacturer datasheet to confirm package type and temperature grade. Rochester Electronics sources end-of-life components; ensure the die revision matches your system requirements. Request lot traceability and test reports for critical aerospace or medical applications. Confirm RoHS compliance status as it varies by manufacturing source date.

Selection Notes

Select this component when replacing obsolete Motorola or National Semiconductor MC3486 or SN75179 equivalents. Ensure the system voltage aligns with the 5V logic family. Consider pin compatibility with existing PCB footprints if upgrading from through-hole to surface mount variants. Validate that the input common-mode range covers the expected signal levels in the target application.

Part Context

Rochester Electronics specializes in sourcing and distributing discontinued semiconductor products. The 26LS32JC falls under their portfolio of interface ICs, specifically targeting the RS-422 receiver market. This part allows engineers to maintain production lines without redesigning hardware for obsolete components. It represents a bridge between legacy design architectures and modern supply chain constraints.

Replacement Considerations

Direct pin-compatible replacements include the MC3486 and SN75179. Verify electrical parameters such as propagation delay and input threshold voltages against the original design specifications. Ensure thermal management remains adequate as power dissipation characteristics may differ slightly between manufacturers.