DS8934WMX

Overview

The DS8934WMX is a dual line transceiver manufactured by National Semiconductor, now part of Texas Instruments. It integrates two independent drivers and receivers in a single package, designed for high-speed data transmission over balanced lines. The device supports EIA-422, ST412, and ST506 interface standards. It features differential outputs for the drivers and differential Schmitt trigger inputs for the receivers to ensure noise immunity. The component operates within a standard commercial temperature range and utilizes a 16-pin plastic small outline package (SOP-16) with a lead pitch of 0.150 inches.

Feature Summary

• Integrates two independent line drivers and receivers for dual-channel communication
• Provides differential output signals from the drivers to support balanced transmission lines
• Utilizes differential Schmitt trigger inputs on the receivers to filter noise and ensure signal integrity
• Supports multiple industry-standard interfaces including EIA-422, ST412, and ST506

Applications

• High-speed serial data communication systems requiring balanced line interfacing
• Industrial control networks utilizing EIA-422 or ST412 protocols
• Data acquisition equipment needing robust differential signal transmission
• Computer peripheral interfaces compliant with ST506 standards

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as the company was acquired. Confirm the specific suffix 'WMX' corresponds to the correct tape-and-reel packaging variant if applicable, though datasheets may list generic SOP-16. Check RoHS compliance status, as older batches may not meet current environmental regulations. Ensure the operating temperature range matches the intended application environment.

Selection Notes

Select this component when a dual-channel transceiver is required for EIA-422 or similar differential bus architectures. Compare pin compatibility with other dual transceivers if space constraints exist. Verify that the input threshold characteristics of the Schmitt triggers align with the source driver voltage levels. Consider the package size relative to available PCB real estate in the design.

Part Context

This device belongs to the family of high-speed line transceivers produced by National Semiconductor. These components are typically used to bridge logic-level signals to balanced transmission lines. The DS8934 series offers integrated solutions for both transmitting and receiving data, reducing the component count compared to using separate drivers and receivers.

Replacement Considerations

Check for direct equivalents such as the DS8934 without the MX suffix for different packaging options. Other dual line transceivers from manufacturers like Maxim Integrated or NXP may serve as functional substitutes if pinouts and electrical specifications match exactly.