26LS33/BEA

Overview

The Rochester Electronics LLC 26LS33/BEA is a quad differential line driver designed for RS-422 serial data transmission. It accepts TTL-compatible input signals and converts them into balanced differential outputs suitable for high-speed communication over twisted-pair cables. The component operates within a standard industrial temperature range and utilizes a single positive supply voltage. This device provides robust signal integrity for digital data links in noisy environments, ensuring reliable point-to-point or multi-drop connectivity.

Feature Summary

• Converts TTL logic levels to RS-422 compliant differential signals
• Provides four independent output channels for simultaneous data transmission
• Ensures high noise immunity through balanced line driving capabilities

Applications

• Industrial serial communication networks requiring RS-422 compliance
• Data acquisition systems utilizing balanced transmission lines
• Embedded control units needing isolated differential output stages

Procurement Notes

Verify the specific manufacturing date code and lot traceability upon receipt. Confirm that the package marking matches the official part identifier. Check for physical damage to the leads and ensure the hermetic seal remains intact if applicable. Validate electrical parameters against the original datasheet specifications before integration into the final assembly.

Selection Notes

Select this component when a quad differential driver is required for RS-422 interfaces. Ensure the system design supports the necessary supply voltage and current consumption. Consider the package type compatibility with the printed circuit board layout. Verify that the thermal dissipation requirements are met within the intended operating environment.

Part Context

Rochester Electronics specializes in sourcing and distributing obsolete and hard-to-find semiconductor components. The 26LS33/BEA represents a legacy interface solution often retained in long-life industrial and military applications. This part serves as a critical replacement for original equipment manufacturers maintaining existing infrastructure without redesigning the interface layer.

Replacement Considerations

Direct pin-for-pin replacements may include other quad differential drivers meeting RS-422 standards. Verify electrical characteristics such as propagation delay and output voltage levels. Ensure mechanical dimensions and lead configurations match the existing footprint.