DS8934WM

Overview

The DS8934WM is a dual line transceiver manufactured by National Semiconductor, now part of Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 10 Mbps. The device features differential outputs and includes active-under-shutdown receivers with tristatable functionality. It is housed in a 16-pin Plastic Small Outline (SOP-16) package with a maximum length of 9.9 mm. The component complies with EIA-422, ESDI, ST412, and ST506 interface standards and functions as both a line driver and receiver.

Feature Summary

• Supports differential output signaling for robust data transmission
• Integrates active-under-shutdown receivers to maintain signal integrity during low-power states
• Provides tristatable receiver capability for bus sharing applications

Applications

• RS-422 communication interfaces
• ST506 disk drive controllers
• ST412 peripheral connections

Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the ordering suffix matches the required temperature grade and packaging specifications. Confirm RoHS compliance status if environmental regulations apply to your assembly process. Cross-reference the datasheet revision date to ensure compatibility with current design requirements.

Selection Notes

Select this component when designing systems requiring dual-channel differential line interfacing at moderate speeds. Verify that the 5V logic levels align with the system's power domain. Consider the SOP-16 package dimensions for PCB layout constraints. Evaluate the need for tristate control signals to manage bus contention effectively in multi-drop configurations.

Part Context

This device belongs to the family of high-speed line transceivers designed for reliable serial data communication. It complements other interface solutions by providing balanced differential signaling capabilities. The component serves as a bridge between microprocessor-based systems and external peripherals requiring standardized differential protocols.

Replacement Considerations

Check for direct pin-compatible alternatives from Texas Instruments or other manufacturers offering RS-422/ST506 compatible transceivers. Verify electrical parameter equivalence, particularly input threshold voltages and output drive strengths, before substitution.