DS8922AMX

Overview

The DS8922AMX is a dual differential line driver and receiver pair manufactured by Texas Instruments, housed in a 16-pin SOIC package. It operates within a supply voltage range of 4.5 V to 5.5 V at temperatures between 0°C and 70°C. The device features a typical propagation delay of 12 ns with an output skew of ±0.5 ns. It provides complementary driver outputs and includes TRI-STATE functionality for independent control of driver and receiver pairs. The receivers offer high input sensitivity of 200 mV over a ±7V common-mode range, with 70 mV hysteresis and fail-safe circuitry.

Feature Summary

• Dual differential line driver and receiver pairs designed for RS-422 standards
• TRI-STATE outputs with independent control functions for drivers and receivers
• High noise immunity with 70 mV receiver input hysteresis and fail-safe circuitry
• Glitch-free power up/down circuitry prevents erroneous transmission during power transitions

Applications

• ESDI disk drive interfaces
• ST506 and ST412 disk drive applications
• RS-422 compliant data transmission systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Confirm that the component status aligns with project requirements, as availability may be limited or subject to lifetime-buy periods. Ensure compatibility with existing PCB footprints and soldering profiles before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring dual differential signaling with low skew and high noise margins. Verify that the operating temperature range meets environmental constraints. Consider the TRI-STATE capability if bus sharing or multi-drop configurations are required. Ensure the 16-pin SOIC package fits the available board space and manufacturing capabilities.

Part Context

The DS8922 series belongs to Texas Instruments' family of RS-422 interface integrated circuits. It is functionally related to the DS8923A, which offers separate enable controls for drivers and receivers. These devices are designed to replace older discrete logic solutions, providing integrated timing and noise rejection in a compact surface-mount package suitable for industrial and storage applications.

Replacement Considerations

DS8922AM/NOPB (Tube packaging)

FAQ

What is the typical output skew for the DS8922AMX?

The typical output skew is ±0.5 ns.

Does the DS8922AMX have separate enable controls for drivers and receivers?

No, the DS8922/22A has independent control functions common to a driver and receiver pair. The DS8923A variant has separate driver and receiver control functions.

What is the receiver input hysteresis value?

The receiver input hysteresis is typically 70 mV.