LM311D

Overview

The LM311D is a high-speed, single-channel differential voltage comparator manufactured by Texas Instruments. It operates within a supply voltage range of 3.5V to 30V (single) or ±1.75V to ±15V (dual). Key electrical specifications include a maximum input offset voltage of 7.5mV at ±15V, a maximum input bias current of 0.25µA, and a typical response time of 115ns. The device features MOS, open-collector, open-emitter, and TTL-compatible outputs. It is housed in an 8-SOIC package with a wide operating temperature range of 0°C to 70°C.

Feature Summary

• Supports multiple output configurations including MOS, open-collector, open-emitter, and TTL compatibility for flexible interfacing.

Applications

• High-speed voltage monitoring
• Window comparator circuits
• Zero-crossing detection

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 surface-mount package variant. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the operating temperature grade matches the 0°C to 70°C specification required for the application environment.

Selection Notes

Select this component when a single-channel differential comparator with versatile output drive capabilities is required. The 8-SOIC package suits space-constrained surface-mount designs. Verify that the 115ns response time meets the speed requirements of the target circuit.

Part Context

This part belongs to the LM311 family of high-performance voltage comparators from Texas Instruments. The family includes variants like LM111 and LM211 with extended temperature ranges. The LM311D specifically denotes the commercial grade version in the standard SOIC-8 package.

Replacement Considerations

LM311DR: Tape-and-reel version of the same device. LM311PWRG4: TSSOP-8 package equivalent. LM311DT: Alternative manufacturer source.