LM311 Differential Comparator

Description

LM311 – Voltage Comparator IC Product Overview / Mini Datasheet 📌 General Description The LM311 is a single high-speed voltage comparator capable of driving TTL, MOS, and open-collector logic outputs. It’s designed to compare two input voltages and output a digital signal indicating which input is higher. The open-collector output allows for flexible interfacing and wired-AND logic configurations. ⚙️ Specifications Parameter Value Type Voltage Comparator (Single) Number of Comparators 1 Supply Voltage ±5V to ±15V (or 5V to 30V single supply) Input Offset Voltage Typically 2 mV (max 7 mV) Response Time 200 ns (with 20 mV overdrive) Output Type Open-collector Output Sink Current Up to 50 mA Input Voltage Range Up to ±15V (or VCC−2V for single supply) Operating Temperature -40°C to +85°C (LM311N) Package Types DIP-8 🧪 Key Features Operates from single or dual supplies High output current drive (50 mA) Open-collector output for wired logic Wide input voltage range Fast response time (~200 ns) Compatible with TTL, CMOS, and MOS logic 🛠️ Common Applications Zero-crossing detectors Pulse-width modulation Oscillators Window comparators Analog-to-digital converter circuits Voltage level detection 🧯 Pinout (8-pin DIP / SOIC) +--------+ IN+ |1 8| V+ IN- |2 7| Balance/Strobe GND |3 6| Output NC |4 5| Balance +--------+ Pin 1: Non-inverting Input Pin 2: Inverting Input Pin 3: Ground Pin 4: Not Connected Pin 5: Balance Pin 6: Output (Open Collector) Pin 7: Balance/Strobe Pin 8: V+ (Sup