LM2903P

Overview

The LM2903P is a dual differential input voltage comparator from Texas Instruments, designed for single-supply operation across a wide voltage range. It features an open-collector output configuration and includes ground in its common-mode input voltage range. The device operates on a supply voltage between 2 V and 36 V with a typical response time of 1.3 µs. Key electrical parameters include a maximum input offset voltage of 7 mV, an input bias current of 25 nA, and a quiescent supply current of 200 µA. It supports a maximum output sink current of 6 mA per channel and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Dual differential input architecture optimized for single-supply applications
• Open-collector outputs allow direct interfacing with various logic families including CMOS and TTL
• Common-mode input voltage range extends to ground potential
• High tolerance for high differential input voltages

Applications

• Overvoltage and undervoltage monitoring circuits
• Window comparator designs
• Level shifting and digital interface circuits
• Temperature sensing threshold detection

Procurement Notes

Verify the package type matches the required DIP-8 form factor. Confirm the operating temperature range meets system requirements, as industrial variants may differ. Ensure the open-collector output configuration aligns with the pull-up resistor requirements of the target logic circuit. Check for specific suffix variations that may indicate different temperature grades or packaging options.

Selection Notes

Select this component when a dual comparator with ground-referenced inputs is needed for single-supply systems. The open-collector output simplifies interfacing with different voltage levels without additional level shifters. Consider the 1.3 µs response time for speed requirements; faster alternatives exist if propagation delay is critical. Verify power dissipation limits under maximum load conditions.

Part Context

The LM2903P belongs to the LMx93/LM2903 series of dual comparators manufactured by Texas Instruments. This family shares functional similarities with the LM193, LM293, and LM393, differing primarily in temperature ranges and commercial availability. The LM2903P specifically denotes the commercial grade version housed in a standard DIP-8 package, widely used in general-purpose analog switching applications.

Replacement Considerations

• LM293P
• LM393P
• LM193P