26LS29DM/B

Overview

The 26LS29DM/B is a quad differential line driver manufactured by Rochester Electronics, LLC. It implements the RS-422 standard for balanced digital interfacing. The device features four independent drivers designed to transmit data over long distances with high noise immunity. It operates within a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 10 Mbps. The component is housed in an 18-pin DIP package (MS-011-BB) suitable for through-hole mounting.

Feature Summary

• Provides four independent differential line drivers compliant with RS-422 standards
• Ensures high noise immunity through balanced transmission capabilities
• Supports data transfer rates up to 10 Mbps for efficient communication
• Features fail-safe circuitry to maintain defined output states during idle conditions

Applications

• Industrial control systems requiring robust serial communication
• Multi-drop bus networks utilizing RS-422 topology
• Data acquisition systems operating in electrically noisy environments

Procurement Notes

Verify the specific suffix DM/B against the original manufacturer's documentation to confirm pinout compatibility and electrical specifications. Ensure the source provides traceability to the original technology licensor. Confirm that the package type matches the required PCB footprint before integration into the design.

Selection Notes

Select this component when a quad differential driver is required for RS-422 applications. Compare power consumption and propagation delay against other available options. Verify that the operating temperature range meets the environmental requirements of the target system. Check for availability of equivalent parts if lead times are critical.

Part Context

Rochester Electronics specializes in sustaining legacy semiconductor products. This part is likely a continuation of a discontinued device from the original AMD or National Semiconductor family. The company ensures continued production through licensed manufacturing processes. This approach supports industries relying on obsolete components for long-term equipment maintenance.

Replacement Considerations

Direct replacements include the AMD26LS29 or SN75LBC184. Verify pin compatibility and electrical parameters before substitution. Ensure the alternative part meets the same RS-422 compliance standards. Consult official datasheets to confirm functional equivalence.