LM2901N/NOPB

Overview

The LM2901N/NOPB is a quad differential voltage comparator manufactured by Texas Instruments, housed in a 14-pin PDIP package. It operates on a single supply voltage ranging from 2 V to 36 V or dual supplies up to ±18 V. The device features four independent channels with open-collector outputs compatible with TTL and CMOS logic families. Key electrical specifications include a maximum input offset voltage of 7 mV, an input bias current of 250 nA, and a typical response time of 1.3 µs. It supports a maximum output sink current of 20 mA per channel and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Quad differential architecture providing four independent comparison channels in a single package
• Open-collector output stage enabling direct interface with various digital logic families including TTL and CMOS
• Wide single-supply operational capability supporting voltages from 2 V to 36 V
• Low power consumption characteristics suitable for battery-operated applications

Applications

• Over-voltage and under-voltage detection circuits
• Temperature sensing and control systems using thermistors
• Level shifting between different voltage domains
• Simple analog-to-digital conversion interfaces

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance status as defined by Texas Instruments documentation. Confirm the package type is strictly PDIP-14 for through-hole mounting requirements. Ensure the datasheet version matches the required electrical tolerances for input offset voltage and propagation delay. Cross-reference the manufacturer part number against authorized distributor catalogs to confirm authenticity and traceability.

Selection Notes

Select this component when multiple independent voltage comparisons are required within a single integrated circuit footprint. It is appropriate for designs needing open-collector outputs to drive external loads or pull-up resistors. Consider its wide supply voltage range for applications powered by varying battery levels. Evaluate the 1.3 µs response time against signal frequency requirements to ensure adequate switching speed for the target application.

Part Context

The LM2901 series belongs to Texas Instruments' family of low-power quad comparators, sharing functional similarities with the LM139 and LM339 series. The 'N' designation specifies the plastic DIP package, while 'NOPB' denotes non-plumbum (lead-free) manufacturing. This component serves as a general-purpose analog comparator solution for industrial and consumer electronics requiring reliable threshold detection without complex feedback networks.

Replacement Considerations

• LM2901N
• LM2901DR
• LM2901NSR