DS9637ACM/NOPB

Overview

The DS9637ACM/NOPB is a dual differential line receiver manufactured by Texas Instruments, designed to meet EIA RS-422 and RS-423 standards. It operates on a single 5V supply with an input common mode voltage range of ±7V. The device features Schottky TTL compatible outputs and built-in ±35 mV hysteresis for noise immunity. Operating temperature ranges from 0°C to +70°C. Key electrical parameters include a typical propagation delay of 25 ns, an input current of up to 3.25 mA at 10V, and a supply current of 50 mA maximum.

Feature Summary

• Dual-channel architecture supporting RS-422 and RS-423 transmission standards
• High input impedance with extended common mode voltage range of ±7V
• Schottky technology providing TTL-compatible outputs and high-speed performance

Applications

• Digital data systems using differential or single-ended transmission
• RS-422 simplex bus transmission networks
• Military communication systems compliant with MIL-STD 188-114

Procurement Notes

Verify the specific suffix 'CM' indicates the commercial temperature grade (0°C to +70°C) versus military variants. Confirm package type matches the SOIC-8 designation. Ensure ordering documentation aligns with the NOPB lead-free specification. Cross-reference the datasheet revision date against manufacturing lot codes for compliance verification.

Selection Notes

Select this component when designing interfaces requiring RS-422 or RS-423 compliance with a single 5V power source. The ±7V common mode range accommodates significant signal offsets. Consider the 25 ns propagation delay for timing constraints in high-speed serial links. Verify that the load resistance meets the minimum 90Ω requirement for proper signal integrity.

Part Context

This part belongs to the DS9637A family of dual differential receivers. It serves as a robust interface solution for legacy and industrial serial communication protocols. The device integrates Schottky clamping for enhanced switching speed and reliability compared to standard CMOS receivers.

Replacement Considerations

Direct pin-to-pin replacements within the same family include the DS9637AM variant for extended military temperature ranges. Other compatible devices must match the dual-channel configuration and RS-422 electrical specifications.