LM293D

Overview

The LM293D is a dual differential voltage comparator manufactured by Texas Instruments, designed for single-supply operation across a wide voltage range. It features an open-collector output configuration compatible with CMOS and TTL logic families. The device operates within a supply voltage range of 2 V to 30 V, drawing a typical operating current of 500 µA. Key electrical specifications include a maximum input offset voltage of 5 mV, an input bias current of 250 nA, and a channel output current capability of 6 mA. The unit provides a typical response time of 300 ns and functions reliably within an operating temperature range from -25°C to +85°C.

Feature Summary

• Dual differential input architecture optimized for single-supply applications
• Open-collector outputs enabling direct interface with various logic families
• Wide single-supply voltage operational range supporting diverse power environments

Applications

• Voltage monitoring circuits
• Temperature sensing systems
• Waveform generation and shaping

Procurement Notes

Verify the specific datasheet revision and manufacturer documentation to confirm exact electrical tolerances and thermal characteristics. Ensure the selected component matches the required package type and operating temperature range for the intended application environment. Cross-reference official Texas Instruments resources for accurate ordering information and compliance details.

Selection Notes

Select this component when a dual-channel comparator with open-collector outputs is required for single-supply designs. Consider the 300 ns response time and 5 mV input offset voltage for precision requirements. Evaluate the 6 mA sink current capability against load demands. Verify compatibility with downstream logic levels due to the open-collector nature of the outputs.

Part Context

The LM293D belongs to the LMx93 series of dual differential comparators from Texas Instruments. This family includes variants such as the LM193, LM293, and LM2903, which share similar functional architectures but may differ in temperature ranges or packaging options. These devices are engineered for cost-effective performance in general-purpose comparison tasks.

Replacement Considerations

Compatible substitutes include the LM293DR (tape and reel version) and the LM2903D (industrial temperature grade variant). Verify pinout compatibility and electrical parameter alignment before substitution.