AAT4290 Datasheet, PDF (11/12 Pages) Advanced Analogic Technologies – I/O Expander Load Switches with Serial Control

AAT4290/4291
I/O Expander Load Switches with Serial Control
Applications Circuits
V_SUPPLY
1.8 to 5.5V
GPIO 1
System
µController
GPIO 2
GPIO 3
GPIO 4
GPIO 5
AAT4290
IN
OUT1
EN/SET
OUT2
OUT3
OUT4
OUT5
GPIO 2
to
GPIO 5
are now free for
other uses
Function 1
EN 1
Function 2
EN 2
Function 3
EN 3
Function 4
EN 4
Function 5
EN 5
Figure 1: GPIO I/O Expander
(condense five GPIO control lines to one).
V_BATTERY
ON/OFF
CLOCK
AAT3110IJS-5.0
SC70JW8: 2x2mm
VIN
VOUT
10µF
C+
AAT4291IJS
SC70JW8: 2x2mm
IN
10µF
OUT1
OUT2
OUT3
SHDN
1µF
C-
GND
EN/SET
GND
R/G/B LED
R
G
B
R_R
R_G
R_B
Figure 2: RGB LED Control
(eliminates three discrete MOSFET switches).
4290.2005.01.1.0
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