TILM311N/NOPB
Overview
The LM311N/NOPB is a versatile high-speed voltage comparator designed to operate over a wide range of supply voltages from standard 15V op-amp rails down to single 5V logic supplies. It features a unique output stage with an uncommitted collector and emitter, allowing it to drive lamps, relays, or digital logic with ease. The device is known for its ability to interface directly with RTL, DTL, and TTL families while maintaining low input offset currents.
Why Choose This Part
The LM311 offers significantly higher flexibility than standard comparators due to its floating output transistor, which can be referenced to ground or either supply rail. It provides a fast response time while maintaining low power consumption and high input impedance. The inclusion of offset balancing and strobe pins allows for precision tuning and gated operation in complex timing circuits.
Applications
Getting Started
When prototyping, use the 8-pin PDIP package on a standard breadboard and ensure a 0.1uF decoupling capacitor is placed close to the V+ pin. Note that the output is an open-collector configuration, so a pull-up resistor is required to interface with digital logic. If the strobe pin is not being used to disable the output, it should be left open or tied to the positive rail through a resistor depending on specific circuit requirements.
