etc.), large displays in stadiums and public areas, price
indicators in retail stores, promotional panels, bar-graph
displays, industrial controller displays, white good pan-
els, emergency light indicators, and traffic signs.
Figure 1. Main Diagram and Pin Assignments
OUTN11
OUTN10
OUTN12
OUTN13
OUTN14
SDI
AS1110
OUTN15
SDO
+V
LED
OUTN3
OUTN4
OUTN5
OUTN6
OUTN7
OUTN8
OUTN0
OUTN1
OUTN2
OUTN9
CLK
LD
OEN
REXT
GND
V
DD
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AS1110
Datasheet
Contents
1 General Description ................................................................................................................................ 1
2 Key Features .......................................................................................................................................... 1
Serial Interface ....................................................................................................................................................... 9
Global Error Mode ................................................................................................................................................ 11
Constant Current .................................................................................................................................................. 19
Adjusting Output Current ...................................................................................................................................... 19
Package Power Dissipation .................................................................................................................................. 19
Load Supply Voltage ............................................................................................................................................. 19
10 Package Drawings and Markings ....................................................................................................... 21
11 Ordering Information ........................................................................................................................... 23
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AS1110
Datasheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
REXT
GND
GND
GND
GND
V
DD
SDI
OUTN15
OUTN14
OUTN13
OUTN12
OUTN10
OUTN5
OUTN11
OUTN9
OUTN6
REXT
28 27 26 25 24 23 22
CLK
LD
OUTN0
OUTN1
OUTN2
OUTN3
OUTN4
1
2
3
4
5
6
7
8
OUTN5
9
OUTN6
10 11 12 13 14
OUTN10
OUTN8
OUTN7
OUTN9
N/C
21 SDO
20 OEN
24 23 22 21 20 19 18 17 16 15 14 13
AS1110
28-pin QFN 5x5
19 OUTN15
18 OUTN14
17 OUTN13
16 OUTN12
15 OUTN11
1
GND
2
SDI
3
CLK
4
LD
5
OUTN0
6
OUTN1
7
OUTN2
8
OUTN3
9 10 11 12
OUTN4
OUTN7
AS1110
24-pin SSOP
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
SSOP
1
2
3
4
5:20
QFN
24:27
28
1
2
3:10
12:19
Pin Name
GND
SDI
CLK
LD
OUTN0:15
Ground
Serial Data Input
Serial Data Clock.
The rising edge of the CLK signal is used to clock data
into and out of the AS1110 shift register. In error mode, the rising edge of the
CLK signal is used to switch error modes.
Serial Data Load
Output Current Drivers.
These pins are used as LED drivers or for input
sense for diagnostic modes. Data is transferred to the data register at the
rising edge of these pins.
Output Enable.
The active-low pin OEN signal can always enable output
drivers to sink current independent of the AS1110 mode.
0 = Output drivers are enabled.
1 = Output drivers are disabled.
Serial Data Output.
In normal mode SDO is latched out 8.5 clock cycles
after SDI is latched 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
Not connected
Description
21
20
OEN
22
21
SDO
23
24
-
22
23
11
REXT
V
DD
N/C
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OUTN8
SDO
OEN
V
DD
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AS1110
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in
Table 2
may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in
Section 6 Electrical
Characteristics on page 5
is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
V
DD
to GND
Input Voltage
Output Voltage
GND Pin Current
Thermal Resistance
Θ
JA
Ambient Temperature
Storage Temperature
Humidity
Electrostatic
Discharge
Digital Outputs
All Other Pins
-40
-55
5
Min
0
-0.4
-0.4
Max
7
V
DD
+0.4
15
2000
2800
88
23
+85
150
86
2000
2000
+100 +
-100 -
(I
NOM
x 0.5) I
NOM
Units
V
V
V
mA
mA
ºC/W
ºC/W
ºC
ºC
%
V
mA
Non-condensing
Norm: MIL 833 E method 3015
24-pin SSOP package
28-pin QFN (5x5mm) package
on PCB, 24-pin SSOP package
on PCB, 28-pin QFN (5x5mm) package
Comments
Latch-Up Immunity
EIA/JESD78
The reflow peak soldering temperature (body
temperature) specified is in accordance with
IPC/JEDEC J-STD-020D “Moisture/Reflow
Sensitivity Classification for Non-Hermetic Solid
State Surface Mount Devices”.
The lead finish for Pb-free leaded packages is
matte tin (100% Sn).
Package Body Temperature
+260
ºC
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AS1110
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
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