AS1109
Data Sheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
SDI
GND 1
SDI 2
CLK 3
LD 4
OUTN0 5
OUTN1 6
OUTN2 7
OUTN3 8
16-pin SSOP-150
16-pin SOIC-150
16
V
DD
15 REXT
14 SDO
CLK 1
LD 2
OUTN0 3
OUTN1 4
5
OUTN2
6
OUTN3
7
OUTN4
8
OUTN5
16
GND
V
DD
REXT
15
14
13
12 SDO
11 OEN
10 OUTN7
9 OUTN6
AS1109
13 OEN
12 OUTN7
11 OUTN6
10 OUTN5
9 OUTN4
AS1109
16-pin QFN
(4x4mm)
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
16-pin SSOP-150
16-pin SOIC-150
16-pin QFN
(4x4mm)
Pin Name
GND
SDI
CLK
LD
OUTN0:7
Ground
Serial Data Input
Description
1
2
3
4
5:12
15
16
1
2
3:10
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 (R
EXT
) to GND, to setup the load current.
Positive Supply Voltage
13
11
OEN
14
12
SDO
15
16
13
14
REXT
V
DD
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