DS8923AM/NOPB

Overview

The DS8923AM/NOPB is a TRI-STATE RS-422 dual differential line driver and receiver pair housed in a 16-pin SOIC package. It operates within a supply voltage range of 4.5V to 5.5V at temperatures from 0°C to 70°C. The device features a typical propagation delay of 12ns with an output skew of ±0.5ns. It provides complementary driver outputs, high differential or common-mode input voltage ranges of ±7V, and includes receiver input hysteresis of 70mV typical. Separate enable controls allow independent tri-stating of drivers and receivers.

Feature Summary

• Features separate driver and receiver control functions for independent tri-state management
• Designed to meet EIA Standard RS-422, ST506, ST412, and ESDI disk drive standards
• Includes glitch-free power up/down circuitry to prevent erroneous transmission during system transitions

Applications

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

Procurement Notes

Verify the component status as LIFEBUY before finalizing designs. Confirm that the SOIC-16 package dimensions match the PCB footprint requirements. Ensure the operating temperature range of 0°C to 70°C aligns with the target environment specifications. Check for RoHS compliance and lead finish details in the latest packaging addendum.

Selection Notes

Select this component when independent control of driver and receiver states is required, unlike the shared control found in the DS8922 series. Verify compatibility with TTL and CMOS logic levels. Consider the ±7V common mode range for noise immunity in industrial environments. Ensure the 16-pin SOIC package fits the available board space constraints.

Part Context

This part belongs to the DS8922/DS8923A family of TRI-STATE RS-422 transceivers. It differs from the DS8922 by providing separate enable pins for the driver and receiver pairs. The 'AM' suffix indicates the commercial temperature grade, while '/NOPB' denotes a lead-free, halogen-free package compliant with RoHS directives.

Replacement Considerations

The DS8922AM/NOPB serves as a functional substitute if shared driver/receiver control is acceptable. Verify pinout compatibility between the SOIC packages. Ensure the replacement meets the same RS-422 electrical specifications and temperature ratings.