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XRA1405 Datasheet Preview

XRA1405 Datasheet

16-BIT SPI GPIO EXPANDER

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XRA1405
16-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS
SEPTEMBER 2011
REV. 1.0.0
GENERAL DESCRIPTION
The XRA1405 is an 16-bit GPIO expander with an
SPI interface. After power-up, the XRA1405 has
internal 100K ohm pull-up resistors on each I/O pin
that can be individually enabled.
In addition, the GPIOs on the XRA1405 can
individually be controlled and configured. As outputs,
the GPIOs can be outputs that are high, low or in
three-state mode. The three-state mode feature is
useful for applications where the power is removed
from the remote devices, but they may still be
connected to the GPIO expander.
As inputs, the internal pull-up resistors can be
enabled or disabled and the input polarity can be
inverted. The interrupt can be programmed for
different behaviors. The interrupts can be
programmed to generate an interrupt on the rising
edge, falling edge or on both edges. The interrupt
can be cleared if the input changes back to its original
state or by reading the current state of the inputs.
The XRA1405 is available in 24-pin QFN and 24-pin
TSSOP packages.
FEATURES
1.65V to 3.6V operating voltage
16 General Purpose I/Os (GPIOs)
Integrated Level Shifters
5V tolerant inputs
Maximum stand-by current of 1uA at +1.8V
SPI bus interface
SPI Clock Frequency up to 26MHz
Individually programmable inputs
Internal pull-up resistors
Polarity inversion
Individual interrupt enable
Rising edge and/or Falling edge interrupt
Input filter
Individually programmable outputs
Output Level Control
Output Three-State Control
Open-drain active low interrupt output
3kV HBM ESD protection per JESD22-A114F
200mA latch-up performance per JESD78B
APPLICATIONS
Personal Digital Assistants (PDA)
Cellular Phones/Data Devices
Battery-Operated Devices
Global Positioning System (GPS)
Bluetooth
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com




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XRA1405 Datasheet Preview

XRA1405 Datasheet

16-BIT SPI GPIO EXPANDER

No Preview Available !

XRA1405
16-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS
FIGURE 1. XRA1405 BLOCK DIAGRAM
VCC
CS#
SCL
SI
SO
IR Q #
GND
(1 .6 5 V – 3 .6 V )
SPI Bus
Inte rfa ce
G P IO
C o n trol
R e g iste rs
(1 .6 5 V – 3 .6 V )
G P IO s
G P IO s
In teg ra te d
Level
S h ifte rs
REV. 1.0.0
VCCP
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
ORDERING INFORMATION
PART NUMBER
XRA1405IL24-F
XRA1405IL24TR-F
XRA1405IG24-F
XRA1405IG24TR-F
PACKAGE
QFN-24
QFN-24
TSSOP-24
TSSOP-24
NUMBER OF
GPIOS
16
16
16
16
NOTE: TR = Tape and Reel, F = Green / RoHS
OPERATING TEMPERATURE
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
FIGURE 2. PIN OUT ASSIGNMENTS
DEVICE STATUS
Active
Active
Active
Active
24 23 22 21 20 19
P0 1
18 CS#
P1 2
17 P15
P2 3
P3 4
XRA1405
24-Pin QFN
16 P14
15 P13
P4 5
14 P12
P5 6
13 P11
7 8 9 10 11 12
IRQ# 1
VCC 2
SI 3
P0 4
P1 5
P2 6
P3 7
P4 8
P5 9
P6 10
P7 11
GND 12
XRA1405
24-Pin
TSSOP
24 VCCP
23 SO
22 SCL
21 CS#
20 P15
19 P14
18 P13
17 P12
16 P11
15 P10
14 P9
13 P8
2


Part Number XRA1405
Description 16-BIT SPI GPIO EXPANDER
Maker Exar
Total Page 16 Pages
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