www.austriamicrosystems.com/LED-Driver-ICs/AS1115

Revision 1.08

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AS1115

Datasheet - P i n o u t

4 Pinout

Pin Assignments

Figure 2. Pin Assignments (Top View)

Pin Descriptions

Table 1. Pin Descriptions

Pin Name

QSOP-24

TQFN(4x4)-24

Description

SDA

1

22

Serial-Data I/O. Open drain digital I/O I²C data pin.

DIG0:DIG7

2-5, 7-10

1, 2, 4, 5, 6, 7, 23,

24

Digit Drive Lines. Eight digit drive lines that sink current from the display common

cathode. Keyscan detection optional, but must be polled by the Prozessor.

GND

6

3

Ground.

KEYA

11

8

Keyscan Input. Keyscan lines for key readback. Can be used for self-addressing.

KEYB

12

9

Keyscan Input. Keyscan lines for key readback.

ISET

13

10

Set Segment Current. Connect to VDD or a reference voltage through RSET to set the

peak segment current (see Selecting RSET Resistor Value and Using External

Drivers on page 19

).

SCL

14

11

Serial-Clock Input. 3.4MHz maximum rate.

IRQ

24

21

Interupt Request Output. Open drain pin.

SEGA:SEGG,

SEGDP

15-18,

20-23

12-15, 17-20

Seven Segment and Decimal Point Drive Lines. 8 seven-segment drives and decimal

point drive that source current to the display.

VDD

19

16

Positive Supply Voltage. Connect to +2.7 to +5.5V supply.

-

Exposed Pad

Exposed Pad. This pin also functions as a heat sink. Solder it to a large pad or to the

circuit-board ground plane to maximize power dissipation.

AS1115

SEG E

8

18

SEGB

14

DIG2

1

GND

3

AS1115

DIG5

5

10

12

VDD

16

SEGC

17

SEGG

15

SEGF

13

DIG3

2

DIG4

4

DIG6

6

11

9

7

23

21

19

20

22

24

Exposed

Pad