DS8921ATM/NOPB

Overview

The DS8921ATM/NOPB is a differential line driver and receiver pair in an SOIC-8 package. It operates on a single 4.5 V to 5.5 V supply with a typical current of 35 mA. The device features a typical propagation delay of 12 ns and output skew of 0.5 ns. It supports TTL/CMOS inputs, ±7 V common-mode input range, and ±200 mV receiver sensitivity. Operating temperature ranges from -40°C to +85°C.

Feature Summary

• Designed for ST506, ST412, ESDI disk drive standards and RS-422 interfaces
• Provides complementary driver outputs with low output skew
• Supports high differential or common-mode input voltage ranges of ±7 V

Applications

• ST506 Disk Drive Standard
• ST412 Disk Drive Standard
• ESDI Disk Drive Standard
• RS-422 Interface

Procurement Notes

Verify the specific suffix 'AT' confirms industrial temperature operation (-40°C to +85°C) against commercial variants. Confirm the 'MX' suffix indicates tape-and-reel packaging rather than tube. Ensure the 'NOPB' designation matches lead-free and RoHS compliance requirements for your assembly process.

Selection Notes

Select this component when interfacing with legacy disk drive standards like ST506 or ST412 requiring differential signaling. Choose the AT variant specifically for applications operating between -40°C and +85°C. Verify that the 12 ns propagation delay meets system timing constraints compared to faster LVDS alternatives.

Part Context

This part belongs to the DS8921 family, which includes commercial (DS8921) and industrial (DS8921AT) temperature grades. The 'M' suffix denotes the SOIC-8 package, while 'X' indicates reel packaging. It serves as a bridge between single-ended logic and differential transmission lines.

Replacement Considerations

DS8921AM/NOPB: Commercial temperature grade (0°C to 70°C). DS8921ATMX/NOPB: Industrial temperature grade with tape-and-reel packaging instead of tube.