1 General Description
The AS1100 is an LED driver for 7 segment numeric displays of up to
8 digits. The AS1100 can be programmed via a conventional 4 wire
serial interface.
The device includes a BCD code-B decoder, a multiplex scan
circuitry, segment and display drivers, and a 64 Bit memory. The
memory is used to store the LED settings, so that continuous
reprogramming is not necessary.
Every individual segment can be addressed and updated separately.
Only one external resistor is required to set the current through the
LED display. Brightness can be controlled either in an analog or
digital way. The user can choose the internal code-B decoder to
display numeric digits or to address each segment directly.
The AS1100 features an extremely low shutdown current of only
200A and an operational current of less than 5000A. The number of
visible digits can be programmed as well. The AS1100 can be reset
by software and an external clock can be used. Several test modes
support easy debugging.
The AS1100 is offered in a 24-pin SOIC package.
2 Key Features

10MHz Serial Interface

Individual LED Segment Control

Decode/No-Decode Digit Selection

200A Low-Power Shutdown (Data Retained)

Extremely low Operating Current 0.5mA in open loop

Digital and Analog Brightness Control

Display Blanked on Power-Up

Drive Common-Cathode LED Display

Software Reset

Optional External clock

24-pin SOIC Package
3 Applications
The AS1100 is an ideal solution for Bar-Graph Displays, Industrial
Controllers, Panel Meters, LED Matrix Displays and White Goods
such as washing machines and dishwasher.