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 separately.
Only one external resistor (RSET) is required to set the current.
LED brightness can be controlled by analog or digital means.
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 shift register settings, eliminating the
need for continuous device reprogramming.
All outputs of the AS1115 can be configured for key readback. Keyswitch
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 3508A. The number of digits can
be programmed, the devices can be reset by software, and an external
clock is also supported.
The device is available in a QSOP-24 and the TQFN(4x4)-24 package.
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
displays of set-top boxes, VCRs, DVD-players, washing machines,
micro wave ovens, refrigerators and other white good or personal
electronic applications.