LM293P

Overview

The LM293P is a dual differential voltage comparator manufactured by Texas Instruments, housed in an 8-pin PDIP package. It operates on a single supply voltage ranging from 2 V to 30 V or dual supplies of ±1 V to ±15 V. The device features two independent precision comparators with open-collector outputs compatible with TTL and CMOS logic families. Key electrical specifications include a typical response time of 300 ns, a maximum input offset voltage of 5 mV, and a quiescent current of 500 µA. The unit supports a continuous output current of 6 mA per channel and functions within a temperature range of -25°C to +85°C.

Feature Summary

• Dual differential voltage comparison capability with independent channels
• Open-collector output structure enabling direct interface with various logic families
• Wide single-supply operating voltage range extending down to 2 V
• Input common-mode voltage range includes ground potential

Applications

• Voltage monitoring systems
• Battery management circuits
• Motor control applications
• Power supply regulation

Procurement Notes

Verify the specific suffix 'P' confirms the PDIP-8 through-hole package variant. Confirm RoHS compliance status via the manufacturer's official documentation for the exact revision. Ensure the application environment remains within the specified -25°C to +85°C operational temperature limits. Validate that external pull-up resistors are correctly sized for the required logic levels and load conditions.

Selection Notes

Select this component when a low-cost, dual-channel comparator with ground-referenced input capability is required. The open-collector output necessitates external pull-up resistors, which must be accounted for in the circuit design. Consider the 300 ns propagation delay for timing-sensitive applications. Verify that the 6 mA sink current capability meets the downstream logic input requirements without exceeding absolute maximum ratings.

Part Context

The LM293P belongs to the LMx93/LM2903 series of dual voltage comparators designed for single-supply operation. This family provides a cost-effective solution for general-purpose comparison tasks where high-speed performance is not critical. The device shares functional similarities with the LM393 but offers specific industrial-grade temperature ranges and packaging options tailored for through-hole assembly processes.

Replacement Considerations

LM393P: Industry-standard equivalent with identical pinout and electrical characteristics. LM2903P: Similar dual comparator with potentially different temperature grade variations. LM293DR: Surface-mount SOIC-8 alternative requiring PCB layout adjustments.