LM2903XK

Overview

The LM2903XK is a dual independent voltage comparator manufactured by Runic Technology, housed in an 8-SOIC surface-mount package. It operates on a single supply voltage ranging from 3.3V to 36V or split supplies of ±1.5V to ±18V. Key electrical specifications include a maximum input bias current of 50pA at 5V, a typical output current of 23mA, and a maximum static current of 180µA. The device features a maximum propagation delay of 2.5µs and a maximum input offset voltage of 3.5mV at 36V. It supports an operating temperature range from -40°C to 125°C and utilizes open-drain outputs.

Feature Summary

• Dual independent voltage comparators designed for wide voltage range operation with single or split power supplies.
• Open-drain output configuration compatible with various logic families including TTL, CMOS, and MOS.
• Input common-mode voltage range includes the negative supply rail, allowing ground-level sensing.

Applications

• General-purpose analog signal comparison circuits
• Voltage monitoring and threshold detection systems
• Industrial control logic interfaces

Procurement Notes

Verify the manufacturer designation as Runic Technology against official datasheets, as the LM2903 part number is widely used by other semiconductor vendors such as STMicroelectronics and Texas Instruments. Confirm that the specific suffix 'XK' corresponds to the 8-SOIC package and the stated electrical parameters like the 50pA input bias current. Ensure compliance with RoHS3 standards and check for any automotive qualification requirements if applicable to the target application environment.

Selection Notes

Select this component when low input bias current and wide supply voltage compatibility are required in a compact surface-mount form factor. The open-drain output allows for flexible interfacing with different logic levels. Consider the thermal performance within the -40°C to 125°C range and ensure the PCB layout accommodates the 8-SOIC footprint dimensions for proper heat dissipation and signal integrity.

Part Context

The LM2903 series represents a family of dual precision voltage comparators originally popularized by major manufacturers. This variant by Runic Technology adheres to the standard functional pinout and electrical characteristics associated with the LM2903 designation, providing a cost-effective solution for general-purpose comparison tasks in consumer and industrial electronics where space constraints favor SOIC packaging.

Replacement Considerations

Direct substitutes include LM2903DT from STMicroelectronics and LM2903DR from Rohm Semiconductor. Verify pin compatibility and electrical parameter tolerances before substitution.