DS8922M/NOPB

Overview

The DS8922M/NOPB is a dual differential line driver and receiver pair designed for RS-422, ST506, ST412, and ESDI disk drive standards. It operates on a single 5V supply (4.5V to 5.5V) within a 0°C to 70°C temperature range. The device features a typical propagation delay of 12 ns and output skew of ±0.5 ns. It provides complementary driver outputs and independent tri-state control for each channel. Input sensitivity is 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 optimized for high-speed data transmission
• Independent tri-state control functions for individual driver and receiver channels
• Receiver input fail-safe circuitry ensures logical one state when inputs are open
• Glitch-free power up/down circuitry prevents erroneous signals during system transitions

Applications

• ST506 and ST412 disk drive interface applications
• ESDI (Enhanced Small Device Interface) systems
• RS-422 compliant communication networks

Procurement Notes

Verify the specific ordering suffix against current Texas Instruments documentation to confirm package type and environmental compliance. Confirm that the component status aligns with design requirements, as availability may vary based on production lifecycle stages. Ensure all electrical parameters match the target application specifications before finalizing procurement orders.

Selection Notes

Select this component for applications requiring dual differential signaling with independent channel control. Verify that the operating voltage range of 4.5V to 5.5V matches the system power supply. Consider the 0°C to 70°C commercial temperature range for environmental suitability. Ensure compatibility with TTL and CMOS logic levels for seamless integration into existing digital circuits.

Part Context

The DS8922M/NOPB belongs to the DS8922/DS8922A/DS8923A family of RS-422 transceivers. It shares core functionality with the DS8922AM/NOPB but differs in packaging and potentially qualification grades. This series is engineered for robust performance in disk drive interfaces and industrial communication environments requiring reliable differential signal integrity.

Replacement Considerations

The DS8922AM/NOPB serves as a direct functional substitute within the same product family. Verify pinout compatibility and ensure the alternative part meets the required temperature and voltage specifications for the intended application environment.