LM339DBRE4

Overview

The LM339DBRE4 is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features four independent comparators within a single package, utilizing an open-collector output configuration that facilitates wired-AND connections and compatibility with various logic families. The device operates across a wide supply voltage range of 2V to 36V or dual supplies of ±1V to ±18V. Key electrical characteristics include a typical response time of 1.3µs, a maximum input offset voltage of 5mV, and an input bias current of 250nA. It supports an output sink current of up to 16mA at 5V and consumes approximately 2mA of supply current. The component is housed in a 14-pin TSSOP surface-mount package.

Feature Summary

• Quad differential voltage comparator architecture
• Wide single or dual power supply operation
• Open-collector output capability
• Low power consumption design

Applications

• Temperature monitoring systems
• Voltage level detection circuits
• Over-voltage protection mechanisms
• Digital-to-analog converter (DAC) output monitoring

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free composition and RoHS compliance as per manufacturer standards. Confirm the TSSOP-14 package dimensions match the target PCB footprint requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision date to confirm parameter consistency with existing designs.

Selection Notes

Select this component when multiple independent comparison functions are required in a compact surface-mount form factor. The open-collector output allows flexible interfacing with different logic voltage levels without additional level shifting components. Consider the 1.3µs propagation delay for timing-sensitive applications. Evaluate the 5mV input offset voltage tolerance against the precision requirements of the signal being monitored.

Part Context

The LM339 series represents a legacy standard in analog comparison, widely adopted for its reliability and cost-effectiveness. The 'D' suffix denotes the TSSOP package variant, while 'B' typically indicates tape and reel packaging for automated assembly. The 'E4' suffix specifically identifies the lead-free and RoHS-compliant version of the device, ensuring adherence to modern environmental regulations for electronic components.

Replacement Considerations

LM339DR: Identical functional specifications with SOIC-14 packaging instead of TSSOP. LM339N: PDIP-14 through-hole equivalent for prototyping or legacy board upgrades. LM339PW: TSSOP-14 alternative from NXP Semiconductors with compatible pinout and electrical characteristics.