LM293P-NG

Overview

The LM293P-NG is a dual differential voltage comparator manufactured by Texas Instruments, designed for single-supply operation within a wide voltage range of 2 V to 30 V. It features two independent channels with open-collector outputs compatible with CMOS and TTL logic families. The device operates with a typical supply current of 500 µA and provides an output current capability of 6 mA per channel. Key electrical specifications include a maximum input offset voltage of 5 mV, an input bias current of 250 nA, and a response time of 300 ns. It functions reliably across an operating temperature range from -25 °C to +85 °C.

Feature Summary

• Dual differential voltage comparison with open-collector outputs
• Wide single-supply voltage operation from 2 V to 30 V
• Compatible with CMOS and TTL logic families
• Low power consumption with 500 µA supply current

Applications

• Voltage monitoring systems
• Over-voltage protection circuits
• Window comparator designs

Procurement Notes

Verify the specific suffix 'NG' against the manufacturer's official documentation to confirm it denotes a lead-free or green molding variant, as suffixes can indicate environmental compliance or material changes without altering electrical function. Ensure the PDIP-8 package matches your PCB footprint requirements. Cross-reference the part number with the latest datasheet revision to confirm pinout consistency and any updates to absolute maximum ratings or thermal characteristics before finalizing procurement.

Selection Notes

Select this component when a low-cost, dual-channel comparator is required for general-purpose switching applications. It is suitable for designs needing compatibility with standard digital logic levels due to its CMOS/TTL output compatibility. Consider the 300 ns response time for speed requirements; if faster switching is needed, evaluate other series members. The wide supply voltage range makes it adaptable to various power rails, while the open-collector output allows for flexible interfacing with different load types.

Part Context

The LM293P-NG belongs to the LM293/LM2903 family of dual differential comparators from Texas Instruments. This family is characterized by its ability to operate from a single power supply with input voltages including ground. The 'LM293' designation typically refers to the commercial grade version, while the 'NG' suffix often indicates a non-halogenated or environmentally compliant manufacturing process. These devices are widely used in industrial and consumer electronics for basic voltage threshold detection tasks.

Replacement Considerations

The LM293P is the direct functional equivalent. The LM2903P is also compatible but may differ in temperature range or specific electrical parameters; verify datasheet details. Other dual comparators like the LM311P offer different performance characteristics and should be evaluated based on specific application needs.