A S 11 0 6 , A S 11 0 7

8 - D i g i t L E D D i s p l a y D r i v e r s

www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07

Revision 2.29

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D a t a s h e e t

1 General Description

The AS1106 and the AS1107 are compact display drivers for 7-

segment numeric displays of up to 8 digits. The devices can be

programmed via SPI, QSPI, and Microwire as well as a conventional

4-wire serial interface.

The devices include an integrated BCD code-B/HEX decoder,

multiplex scan circuitry, segment and display drivers, and a 64-bit

memory. Internal memory stores the LED settings, eliminating the

need for continuous device reprogramming.

Every segment can be individually addressed and updated

separately. Only one external resistor (RSET) is required to set the

current through the LED display. LED brightness can be controlled

by analog or digital means. The devices can be programmed to use

the internal code-B/HEX decoder to display numeric digits or to

directly address each segment.

The AS1106 and the AS1107 feature an extremely low shutdown

current of typically 3 A, and an operational current of less than

500 A. The number of digits can be programmed, the devices can

be reset by software, and an external clock is also supported.

Additionally, segment blinking can be synchronized across multiple

drivers.

Several test modes are available for easy application debugging.

The devices are available in a SOIC 24-pin package.

Figure 1. AS1106, AS1107 - Typical Application Diagram

2 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

3 A 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

Low-EMI Low Slew-Rate Limited Segment

Drivers (AS1107)

Supply Voltage Range: 2.7 to 5.5V

Software Reset

Optional External Clock

SOIC 24-pin Package

3 Applications

The AS1106 and AS1107 are 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.

AS1106/

AS1107

8-Digit Microprocessor Display

DIG0 to

DIG7

SEG A to G

SEP DP

8 Digits

8 Segments

I/O

I/O

SCK

VDD

ISET

DIN

CLK

GND

GND

LOAD/CSN

+5V

9.53k

Ω

Micro-

processor