DS75108M

Overview

The DS75108M is a dual differential line driver manufactured by National Semiconductor, now part of Texas Instruments. It features two independent drivers capable of transmitting data over balanced transmission lines. The device operates with a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 20 Mbps. It utilizes a 16-pin SOIC package for surface-mount installation. The inputs are compatible with TTL logic levels, ensuring straightforward integration with standard digital systems.

Feature Summary

• Provides two independent differential line drivers for balanced transmission applications
• Accepts TTL-compatible logic input signals directly
• Includes internal termination resistors to minimize signal reflections on the bus
• Operates within standard 5V logic supply voltage specifications

Applications

• RS-422 communication interface circuits
• Balanced data transmission lines in industrial control systems
• High-speed digital signal routing requiring noise immunity

Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments depending on production era. Confirm the 'M' suffix indicates the SOIC package variant. Check for RoHS compliance status if required for modern assembly processes. Ensure the component matches the specific pinout and electrical characteristics defined in the official datasheet before integration into the design.

Selection Notes

Select this component when a dual differential driver is required for RS-422 compliant systems. It is suitable for applications needing TTL input compatibility and balanced output signaling. Consider the SOIC package size for PCB layout constraints. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This component belongs to the DS75 series of line drivers developed by National Semiconductor. These devices were widely used in legacy and industrial electronics for reliable serial communication. The series includes various variants such as the DS75113 and DS75114, differing in drive strength and termination options. The DS75108M specifically addresses dual-channel differential transmission needs.

Replacement Considerations

The SN75108 from Texas Instruments serves as a direct functional equivalent. Other compatible alternatives include the SN55109A for military-grade specifications. Verify pin compatibility and electrical parameters against the original datasheet before substitution.