AS1109 데이터 시트보기 (PDF) - austriamicrosystems AG
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AS1109 Datasheet PDF : 25 Pages
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AS1109
Datasheet
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
GND 1
SDI 2
16 VDD
15 REXT
CLK 3
LD 4
OUTN0 5
OUTN1 6
OUTN2 7
OUTN3 8
AS1109
14 SDO
13 OEN
12 OUTN7
11 OUTN6
10 OUTN5
9 OUTN4
16-pin QSOP-150
16-pin SOIC-150
SDI GND VDD REXT
16 15 14 13
CLK 1
12 SDO
LD 2
OUTN0 3
AS1109
16-pin QFN
(4x4mm)
11 OEN
10 OUTN7
OUTN1 4
9 OUTN6
5
6
7
8
4.1 Pin Descriptions
Table 1. Pin Descriptions
Pin Number
16-pin QSOP-150
16-pin SOIC-150
1
16-pin QFN
(4x4mm)
15
2
16
3
1
4
2
5:12
3:10
13
11
14
12
15
13
16
14
Pin Name
Description
GND
SDI
CLK
LD
OUTN0:7
OEN
SDO
REXT
VDD
Ground
Serial Data Input
Serial Data Clock. The rising edge of the CLK signal is used to clock data into and at
the falling edge out of the AS1109 shift register. In error mode, the rising edge of the CLK
signal is used to switch error modes.
Serial Data Load. Data is transferred to the data register at the rising edge of this pin.
Output Current Drivers. These pins are used as LED drivers or for input sense for
diagnostic modes.
Output Enable. The active-low pin OEN signal can always enable output drivers to sink
current independent of the AS1109 mode.
0 = Output drivers are enabled.
1 = Output drivers are disabled.
Serial Data Output. In normal mode SDO is clocked out 8.5 clock cycles after SDI is
clocked in.
In global error detection mode this pin indicates the occurrence of a global error.
0 = Global error mode returned an error.
1 = No errors.
External Resistor Connection. This pin connects through the external resistor (REXT)
to GND, to setup the load current.
Positive Supply Voltage
www.ams.com/LED-Driver-ICs/AS1109
Revision 1.21
2 - 24
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