a us t ria
m i c r o
s y s t e m s
A S 11 0 6 , A S 11 0 7
8-Digit LED Display Drivers
D a ta S he e t
1 General Description
The AS1106 and the AS1107 are compact display driv-
ers for 7-segment numeric displays of up to 8 digits. The
devices can be programmed via SPI, QSPI, and Microw-
ire 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 (R
SET
) 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 3µA, and an operational
current of less than 500µA. The number of digits can be
programmed, the devices can be reset by software, and
an external clock is also supported. Additionally, seg-
ment blinking can be synchronized across multiple driv-
ers.
Several test modes are available for easy application
debugging.
The devices are available in 24-pin DIP and 24-pin
SOIC packages.
Figure 1. Typical Application Diagram
2 Key Features
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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
Low-EMI Low Slew-Rate Limited Segment
Drivers (AS1107)
Supply Voltage Range: 2.7 to 5.5V
Software Reset
Optional External Clock
Packages:
- 24-pin DIP
- 24-pin SOIC
3 Applications
The AS1106 and AS1107 are ideal for bar-graph dis-
plays, instrument-panel meters, LED matrix displays, dot
matrix displays, set-top boxes, white goods, professional
audio equipment, medical equipment, industrial control-
lers and panel meters.
+5V
9.53kΩ
V
DD
I
SET
DIN
LOAD/CSN
CLK
GND
GND
8-Digit Microprocessor Display
DIG0 to
DIG7
8 Digits
I/O
I/O
SCK
Micro-
processor
AS1106/
AS1107
8 Segments
SEG A to G
SEP DP
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