AS1115 LED Driver IC

64 LED + 16 Keys User Interface LED Driver, I²C Interface

Datasheet: Download Send as Email

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. Key-switch status is obtained by polling for up to 64 keys while 16 keys can be used to trigger an interrupt.

Devices	RESET Input	Interface	Keys	I/O Level
AS1115	no	I²C	16	CMOS
AS1116	no	SPI	None	CMOS
AS1117	yes	I²C	8	1.8V
AS1118	yes	SPI	None	1.8V

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 external clock is also supported.

The device is available in a QSOP-24 and the TQFN(4x4)-24 package.

Software:

Evaluation Software V2_20

Key Features

3.4MHz 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: 2.7V to 5.5V
Software Reset
Optional External Clock
Package:
- QSOP-24
- TQFN(4x4)-24

Applications

The AS1115 is ideal for seven-segment or dot matrix user interface displays of set-top boxes, VCRs, DVD players, washing machines, microwave ovens, refrigerators and other white good or personal electronic applications.