General Description

The AS1108 is a compact display driver for 7-segment numeric displays of up to 4 digits. The device can be programmed via SPI, QSPI, and Microwire as well as a conventional 4-wire serial interface.

The device includes an integrated BCD code-B/HEX decoder, multiplex scan circuitry, segment and display drivers, and a 32-bit memory. Internal memory stores the LED settings, eliminating the need for continuous

device reprogramming.

Key Features

10MHz SPI-, QSPI-, Microwire-Compatible Serial I/O

Individual LED Segment Control

Segment Blinking Control (can be synchronized across multiple drivers)

Hexadecimal- or BCD-Code/No-Decode Digit Selection

3µA Low-Power Shutdown Current (typ; 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 Displays

Supply Voltage Range: +2.7 to +5.5V

Software Reset

Optional External Clock

Packages:

- 20-pin DIP

- 20-pin SOIC

Applications

The AS1108 is ideal for bar-graph displays, instrument panel meters, LED matrix displays, dot matrix displays, set-top boxes, white goods, professional audio equipment, medical equipment, industrial controllers and panel meters.