LM311DT

Overview

The LM311DT is a single voltage comparator manufactured by STMicroelectronics, housed in an 8-pin SOIC surface-mount package. It features a maximum input offset voltage of 10,000 µV and a response time of 200 ns. The device operates within a supply voltage range of +5 V to ±15 V, supporting differential input voltages up to ±30 V. It delivers a maximum output current of 50 mA and consumes 135 mW at ±15 V.

Feature Summary

• Voltage comparator with strobe functionality
• Compatible with RTL-DTL, TTL, and MOS circuits
• Low input current design

Applications

• Signal conditioning systems
• Power-fail detection for NVRAM supervisory devices
• Window comparator configurations

Procurement Notes

Verify the specific manufacturer source, as the LM311 part number is produced by multiple vendors including Texas Instruments and NXP. Confirm that the datasheet corresponds to STMicroelectronics specifications, particularly regarding the 200 ns response time and 10,000 µV offset voltage limits, to ensure compatibility with system requirements.

Selection Notes

Select this component when a high-output current capability of 50 mA is required for direct driving of loads. It is suitable for designs needing operation from standard operational amplifier supplies down to single +5 V logic levels. Ensure the application accommodates the bipolar supply range or appropriate single-supply biasing.

Part Context

This device belongs to the LM311 family of voltage comparators, which are characterized by low input currents and wide supply voltage ranges. The DT suffix indicates the surface-mount SOIC-8 packaging variant, distinguishing it from through-hole DIP versions like the LM311N.

Replacement Considerations

LM311D-T (NXP) offers similar comparator functions with a 200 ns response time.