LM239PT

Overview

The LM239PT is a quad voltage comparator manufactured by STMicroelectronics, housed in a 14-TSSOP surface-mount package. It operates on single supplies from 2V to 32V or dual supplies of ±1V to ±16V. Key electrical parameters include a maximum input offset voltage of 5mV at 30V, typical input bias current of 250nA, and a response time of 1.3µs. The device draws a maximum static current of 2mA and supports open-collector outputs compatible with TTL, CMOS, DTL, ECL, and MOS logic families.

Feature Summary

• Features four independent precision-voltage comparators designed for wide single or split power supply operation.
• Input common-mode voltage range includes ground potential even when powered by a single supply voltage.
• Outputs are compatible with various digital logic families including TTL, CMOS, DTL, ECL, and MOS.
• Provides low supply current consumption that remains largely independent of the supply voltage level.

Applications

• General-purpose analog signal comparison circuits
• Voltage monitoring and threshold detection systems
• Logic interface conversion between different voltage domains

Procurement Notes

Verify the specific suffix 'PT' corresponds to the 14-TSSOP package and tape-and-reel orientation required for your assembly line. Confirm RoHS compliance status matches your environmental regulations. Ensure the operating temperature range of -40°C to +105°C aligns with your system's thermal design constraints before finalizing procurement.

Selection Notes

Select this component when a quad comparator configuration is needed with ground-referenced input capability on a single supply. It is suitable for applications requiring compatibility with standard digital logic outputs without additional pull-up resistors for certain logic families. Consider the 1.3µs response time against your signal speed requirements.

Part Context

This part belongs to the LM239 family of low-power quad comparators. While other variants like LM239D (SOIC) or LM239N (PDIP) exist, the PT suffix specifically denotes the thin-shrink small-outline package. This family is widely used in industrial and consumer electronics for basic analog-to-digital interfacing tasks.

Replacement Considerations

Direct pin-compatible replacements within the same package include LM239DT (SOIC-14) if mechanical adaptation is possible. Cross-package substitutes require schematic review due to pinout differences. Verify electrical equivalence regarding offset voltage and supply current ranges.