LM339DT

Overview

The LM339DT is a quad voltage comparator manufactured by ROHM Semiconductor, housed in a 14-pin SOP package. It operates on a single supply of 2 V to 36 V or dual supplies of ±1 V to ±18 V. Key electrical parameters include a typical response time of 1.3 µs, a maximum input offset voltage of 7 mV, and an input bias current of 250 nA. The device features open collector outputs capable of sinking 16 mA per channel, with a typical operating supply current of 1.1 mA. It supports TTL, CMOS, DTL, ECL, and MOS logic families.

Feature Summary

• Integrates four independent high-gain comparators within a single low-power package.
• Features open-collector outputs compatible with various logic families including TTL and CMOS.
• Operates across wide single or dual power supply voltage ranges.

Applications

• General-purpose analog signal comparison circuits
• Voltage monitoring systems
• Logic level shifting interfaces

Procurement Notes

Verify the manufacturer designation as ROHM Semiconductor for this specific part number, noting that identical model numbers may be produced by other vendors such as STMicroelectronics or NXP. Confirm the package type is SOP-14 and check for RoHS compliance status. Ensure the component meets the required operating temperature range of -40°C to +85°C for your specific application environment before procurement.

Selection Notes

Select this component when a quad comparator configuration is required with low power consumption and wide supply voltage flexibility. The open-collector output allows for wired-AND connections and easy interfacing with different logic voltage levels. Consider the 1.3 µs response time and 7 mV offset voltage specifications against your circuit's precision and speed requirements.

Part Context

This component belongs to the LM339 series of low-power quad voltage comparators. It is designed for applications requiring multiple comparison functions in a compact surface-mount format. The device is widely used in industrial and consumer electronics where cost-effective, reliable voltage sensing is necessary.

Replacement Considerations

Cross-reference with LM339 variants from other manufacturers like STMicroelectronics or NXP if sourcing constraints exist. Verify pinout compatibility and electrical parameter equivalence, particularly regarding supply voltage limits and output drive capabilities, before substituting.