Data Sheet

AS1115
64 LEDs, I²C Interfaced LED Driver with Keyscan
www.austriamicrosystems.com/LED-Driver-ICs/AS1115 Re
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Datasheet
1 General Description
The AS1115 is a compact LED driver for 64 single LEDs or 8 digits of
7-
segments. The devices can be programmed via an I²C compatible
2-wire interface.
Every segment can be individually addressed and updated sepa-
rately. Only one external resistor (RSET) is required to set the cur-
rent. LED brightness can be controlled by analog or digital means.
The devices include an integrated BCD code-B/HEX decoder, multi-
plex scan circuitry, segment and display drivers, and a 64-bit mem-
ory. Internal memory stores the shift register settings, eliminating the
need for continuous device reprogramming.
All outputs of the AS1115 can be configured for key readback. Key-
switch status is obtained by polling for up to 64 keys while 16 keys
can be used to trigger an interrupt.
Additionally the AS1115 offers a diagnostic mode for easy and fast
production testing.
The AS1115 features a low shutdown current of typically 200nA, and
an operational current of typically 350µA. The number of digits can
be programmed, the devices can be reset by software, and an exter-
nal clock is also supported.
The device is available in a QSOP-24 and the TQFN(4x4)-24 pack-
age.
Figure 1. AS1115 - Typical Application Diagram
2 Key Features
 up to 1MHz I²C-Compatible Interface
 Individual LED Segment Control
 Readback for 16 Keys plus Interrupt
 Open and Shorted LED Error Detection
- Global or Individual Error Detection
 Hexadecimal- or BCD-Code for 7-Segment Displays
 200nA Low-Power Shutdown Current (typ; data retained)
 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
 Package:
- QSOP-24
- TQFN(4x4)-24
3 Applications
The AS1115 is ideal for seven-segment or dot matrix user interface
di
splays of set-top boxes, VCRs, DVD-players, washing machines,
micro wave ovens, refrigerators and other white good or personal
electronic applications.
AS1115
DIG0 to
DIG7
SEGA-DP
KEY0-7
8
SDA
SCL
IRQ
V DD
ISET
SDA
IRQ
GND
SCL
2.7 to 5.5V
9.53kΩ
µP
8
KEYA
KEYB
8
ams AG
Technical content still valid