LM239DE4

Overview

The LM239DE4 is a quad differential voltage comparator manufactured by Texas Instruments, belonging to the LM239 series. It features four independent high-gain comparators designed for single or dual power supply operation. The device operates within a wide supply voltage range of 2 V to 30 V (single) or ±1 V to ±15 V (dual). Key electrical parameters include a maximum input offset voltage of 5 mV, an input bias current of 250 nA, and a typical response time of 300 ns. It provides an open-collector output capable of sinking up to 6 mA per channel, ensuring compatibility with various logic families including TTL and CMOS.

Feature Summary

• Quad differential architecture providing four independent comparison channels in a single package
• Wide single-supply operating range from 2 V to 30 V, eliminating the need for dual supplies
• Open-collector outputs allow direct interfacing with diverse logic systems such as TTL, DTL, ECL, MOS, and CMOS
• Input common-mode voltage range includes ground, enabling detection near zero volts

Applications

• Temperature monitoring and control circuits
• Voltage level detection and threshold sensing
• Logic interface adapters between different voltage domains
• Simple analog-to-digital conversion stages

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status during procurement. Confirm the package type corresponds to SOIC-14 for surface-mount installation. Ensure the ordering part number matches the exact manufacturer designation to avoid confusion with non-E4 variants that may have different environmental certifications.

Selection Notes

Select this component when multiple independent voltage comparisons are required within space-constrained designs. It is suitable for applications demanding low power consumption and wide supply voltage flexibility. Consider the open-collector output limitation if push-pull drive capability is strictly necessary without external pull-up resistors.

Part Context

The LM239DE4 is part of the broader LMx39 family, which includes the LM139, LM239, and LM339. These devices share similar functional characteristics but differ in temperature ranges and manufacturing specifications. The LM239 specifically targets industrial temperature ranges compared to the commercial LM339, offering enhanced reliability for broader operational environments.

Replacement Considerations

Direct pin-compatible replacements include the LM339DR and LM239DR. Verify that substitute parts meet the required industrial temperature specifications and electrical tolerances before implementation.