LM2903ST

Overview

The LM2903ST is a dual voltage comparator from STMicroelectronics housed in an 8-MiniSO package. It operates on a single supply of +2 V to +36 V or dual supplies of ±1 V to ±18 V. Key electrical parameters include a maximum input offset voltage of 7 mV at 30 V, a typical input bias current of 25 nA, and a maximum static supply current of 2.5 mA. The device features open-collector outputs capable of sinking up to 16 mA and supports TTL, DTL, ECL, MOS, and CMOS logic compatibility.

Feature Summary

• Dual independent low-power voltage comparators designed for wide single or split supply operation
• Input common-mode voltage range includes the negative rail even with single supply operation
• Outputs compatible with various digital logic families including TTL, DTL, ECL, MOS, and CMOS
• Low output saturation voltage ensures efficient signal interfacing

Applications

• Zero crossing detection circuits
• Window comparator configurations
• Time delay generation
• Transducer amplification

Procurement Notes

Verify the specific ordering suffix 'ST' corresponds to the MiniSO8 plastic micropackage as defined in the manufacturer's ordering table. Confirm that the component meets the required temperature range specifications for your application environment. Ensure compliance with RoHS3 standards if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a compact surface-mount solution is required for dual comparator applications. The MiniSO8 package offers space efficiency compared to standard SO8 packages. Consider the input bias current and offset voltage specifications to ensure accuracy requirements are met within the intended operating temperature range.

Part Context

This part belongs to the LM2903 family of low-power dual voltage comparators. The 'ST' suffix specifically designates the MiniSO8 package variant. Other variants in the series include SO8 (D/DT), TSSOP8 (PT), and DFN8 (Q2T/Q3T) packages, offering different form factors for diverse PCB layout needs.

Replacement Considerations

LM2903W: Offers higher ESD performance but requires checking pinout and package compatibility. LM2903H: Suitable for applications requiring extended operating temperatures up to 150 °C.