LM339PT

Overview

The LM339PT is a quad analog comparator manufactured by ROHM Semiconductor, housed in a 14-pin TSSOP surface-mount package. It operates within a supply voltage range of 2V to 32V and supports single or dual power configurations. The device features four independent differential comparators with open-collector outputs compatible with various logic families including CMOS, DTL, ECL, MOS, and TTL. Key electrical specifications include a maximum input offset voltage of 5mV at 30V, an input bias current of 250nA at 5V, and a typical response time of 1.3µs. The unit draws a maximum static current of 2.5mA and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Quad differential architecture providing four independent comparison channels in a compact surface-mount form factor
• Open-collector output stage enabling flexible interfacing with diverse digital logic standards without additional level shifting components
• Wide single-supply operational capability allowing direct integration into low-voltage and standard industrial power systems

Applications

• General-purpose voltage monitoring and threshold detection circuits
• Interface between analog sensors and digital logic systems
• Over-voltage and under-voltage protection schemes

Procurement Notes

Verify the manufacturer designation on the component marking, as the LM339PT part number is utilized by multiple semiconductor vendors including STMicroelectronics and ROHM. Confirm that the specific datasheet aligns with the required pinout and electrical tolerances for your design. Ensure the package variant matches the 14-TSSOP footprint requirements. Cross-reference the ordering suffix to confirm the specific manufacturing source and compliance status before finalizing procurement.

Selection Notes

Select this component when a multi-channel comparison solution is required in a space-constrained surface-mount application. The open-collector output simplifies wired-AND configurations and interface compatibility. Consider the input offset voltage and bias current specifications against the signal source impedance to ensure adequate accuracy. Verify that the operating temperature range meets the environmental conditions of the target system.

Part Context

This component belongs to the LM339 family of quad comparators, a widely adopted standard in analog circuit design. The PT suffix denotes the specific TSSOP-14 packaging configuration. While functionally similar to other quad comparators, this specific part number identifies the surface-mount version intended for automated assembly processes in consumer and industrial electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official replacement guides from the manufacturer or authorized distributors for qualified alternatives.