LM311P

Overview

The LM311P is a high-speed, single-channel differential voltage comparator manufactured by Texas Instruments. It operates within a supply voltage range of 3.5 V to 30 V or ±1.75 V to ±15 V. The device features an open-collector output compatible with TTL and MOS logic families. Key electrical specifications include a maximum average input bias current of 0.25 µA and a maximum input offset voltage of 10,000 µV. It is housed in an 8-pin DIP package designed for through-hole mounting.

Feature Summary

• High-speed differential comparison capability
• Open-collector output compatible with TTL and MOS logic
• Wide single or dual power supply operation

Applications

• Voltage monitoring systems
• Window comparator circuits
• Logic interface adapters

Procurement Notes

Verify the specific suffix 'P' corresponds to the 8-DIP (0.300 inch) package configuration. Confirm lead-free status and RoHS compliance requirements against current manufacturing standards. Ensure the ordering part number matches the exact pinout and thermal characteristics required for the target PCB layout.

Selection Notes

Select this component when a through-hole DIP package is required for prototyping or legacy board designs. Choose the LM311P over surface-mount variants if mechanical stability or manual assembly is prioritized. Verify that the open-collector output architecture aligns with the pull-up resistor requirements of the downstream logic circuit.

Part Context

The LM311P belongs to the LM111/LM211/LM311 family of voltage comparators produced by Texas Instruments. This series provides a standard solution for analog-to-digital signal conversion tasks. The 'P' designation specifically identifies the plastic dual in-line package variant within the broader product line.

Replacement Considerations

LM311N: Identical functional performance but utilizes an 8-pin PDIP package instead of TSSOP/SOIC variants.