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 39A, and an operational current of less than
5009A. 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.
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

39A 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.