LM339DR

Overview

The LM339DR is a quad general-purpose analog comparator manufactured by Texas Instruments. It integrates four independent voltage comparators within a single 14-pin SOIC package. The device operates on a single supply voltage ranging from 2V to 30V, or dual supplies up to ±15V. It features an open-collector output configuration compatible with various logic families including CMOS and TTL. Key electrical specifications include a maximum input offset voltage of 5mV at 30V, a typical response time of 1.3µs, and a quiescent current of approximately 2.5mA. The component supports a continuous output sink current of 20mA.

Feature Summary

• Integrates four independent high-gain voltage comparators for multi-channel signal processing
• Features open-collector outputs enabling direct interfacing with diverse digital logic systems
• Operates across a wide single-supply voltage range suitable for low-power applications

Applications

• General-purpose voltage monitoring circuits
• Threshold detection and level sensing
• Simple analog-to-digital conversion interfaces

Procurement Notes

Verify the specific datasheet revision corresponding to the manufacturing date code, as electrical characteristics may vary between revisions. Confirm that the open-collector output requirement aligns with the target circuit design, as pull-up resistors are mandatory for proper operation. Ensure the selected supplier provides traceability documentation consistent with original equipment manufacturer standards.

Selection Notes

Select this component when multiple independent comparison functions are required in a compact surface-mount footprint. Consider the 1.3µs propagation delay for timing-sensitive designs. Evaluate the 20mA output drive capability against load requirements. Verify compatibility with the intended operating temperature range of 0°C to 70°C for commercial grade applications.

Part Context

The LM339DR belongs to the LM339 family of quad comparators, representing a standard industry solution for basic voltage comparison tasks. It serves as a surface-mount alternative to through-hole variants like the LM339N. The device is part of a broader portfolio that includes military and industrial temperature grade versions such as the LM139 and LM239.

Replacement Considerations

• LM339M
• LM339DRG4