The microchip LED display drivers are monolithic MOS IC’s fabricated in an N-Channel, metal-gate process. The technology produces low-threshold, enhancement-mode, and ion-implanted depletion-mode devices. A single pin controls the LED display brightness by setting a reference current through a variable resistor connected to the supply. It is used in industrial control indicator, relay driver , digital clock, thermometer, counter, voltmeter and instrumentation readouts.

It has continuous brightness control
It is serial data input
No load signal requirement
It has wide power supply operation
TTL compatibility
Their outputs is 34 or 35 , 15 mA Capability
Alphanumeric capability