A S 111 6

6 4 L E D D r i v e r w i t h D e t a i l e d E r r o r D e t e c t i o n

www.austriamicrosystems.com/LED-Driver-ICs/AS1116

Revision 1.08

1 - 23

D a ta s h e e t

1 General Description

The AS1116 is a compact LED driver for 64 single LEDs or 8 digits of

7-segments. The devices can be programmed via an SPI compatible

3-wire interface.

Every segment can be individually addressed and updated sepa-

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.

Additionally the AS1116 offers a diagnostic mode for easy and fast

production testing and allows the use of the AS1116 for critical appli-

cations. The diagnostic allows to detect individual open or shorted

LEDs.

The AS1116 features a low shutdown current of typically 200nA, and

an operational current of typically 350 A. 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 TQFN(4x4)-24 package.

Figure 1. AS1116 - Typical Application Diagram

2 Key Features

10MHz SPI-Compatible Interface

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)

Individual Digit Brightness Control

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 and TQFN(4x4)-24

3 Applications

The AS1116 is ideal for seven-segment or dot matrix displays in pub-

lic information displays at subway, train or bus stations, at airports

and also at displays in public transportation like buses or trains

mobile phones, personal electronic and toys.

AS1116

DIG0 to

DIG7

SEGA to G,

SEG DP

I/O

I/O

I/O

ISET

SDI

LD

GND

SCL

2.7V to 5.5V

9.53k

Ω

µP

8

SDO

AS1116

SDI

LD

SCL

SDO

AS1116

SDI

LD

SCL

SDO

I/O

8

8

8

8

Diagnostic readback: open & shorted LEDs