Ex workshop spare parts and small manufacturing stock
ALL devices have been sourced through reputable local distributors such as RS Electronics, Farnell, WES and Rockby (Victoria) NOT direct import Chinese (often dodgy spec) devices

NATIONAL SEMICONDUCTOR – Differential Comparator
Type: LM311N
Differential Comparator
High Speed (response time 165ns)
Wide range supply voltage: up to 36 Volts (single rail) absolute maximum
Single or Dual rail supply
Strobe capable
Capable of driving lamps or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground. The outputs candrive loads referenced to ground, VCC+or VCC. Offset balancing and strobe capabilities are available, and the outputs can be wire-OR connected.
8 Pin DIL package

Full data on these devices is readily obtainable online
New Old Stock and stored in an ESD tube and they will be supplied the same way

*** Where the photograph shows multiple components, this advertisement is for ONE piece only – not all that are shown! Seems obvious but some people actually ask me this!