DS9638CM/NOPB

Overview

The DS9638CM/NOPB is a Schottky, TTL-compatible dual differential line driver designed to meet EIA RS-422 specifications. It operates on a single 5V supply with an operating temperature range of 0°C to +70°C. The device provides unipolar differential drive to twisted pair or parallel wire transmission lines and features complementary outputs similar to totem pole TTL outputs. Key electrical parameters include a propagation delay of less than 10 ns (typical), output short circuit protection, and input clamp diodes. It is housed in an 8-pin SOIC package.

Feature Summary

• Schottky technology for high-speed operation
• TTL and CMOS compatible inputs
• Output short circuit protection
• Input clamp diodes

Applications

• RS-422 communication systems
• High-speed data transmission over twisted pair lines
• Parallel wire transmission lines

Procurement Notes

Verify the LIFEBUY status before ordering, as this indicates the component is discontinued and available only during a limited lifetime-buy period. Confirm that the 0°C to +70°C commercial temperature range meets your system requirements. Ensure the 8-pin SOIC package dimensions are compatible with your PCB layout. Check for RoHS compliance details if required by your manufacturing standards.

Selection Notes

Select the DS9638CM/NOPB when an RS-422 compliant dual differential driver is needed with TTL compatibility. Consider the 0°C to +70°C temperature range; use the DS9638M variant if industrial temperatures (-55°C to +125°C) are required. Verify that the 5V supply voltage aligns with your system power rails. The SOIC package is suitable for surface mount applications requiring high density.

Part Context

This component belongs to the DS9638 family of RS-422 line drivers from Texas Instruments. It is part of a series of high-speed differential drivers designed for reliable data transmission. The 'CM' suffix denotes the commercial temperature range and SOIC package, while '/NOPB' indicates lead-free and RoHS compliance. It serves as a bridge between TTL logic and differential signaling standards.

Replacement Considerations

The DS9638M/NOPB is a direct replacement offering the same functionality but with an extended temperature range of -55°C to +125°C. Ensure the application environment falls within the commercial range if substituting the M version for the C version. No other functional equivalents are explicitly listed in the provided documentation.