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XRA1202 Datasheet Preview

XRA1202 Datasheet

8-BIT I2C/SMBUS GPIO EXPANDER

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XRA1202/1202P
8-BIT I2C/SMBUS GPIO EXPANDER WITH RESET
APRIL 2013
REV. 1.0.1
GENERAL DESCRIPTION
The XRA1202/1202P is an 8-bit GPIO expander with
an I2C/SMBus interface. After power-up, the
XRA1202 has internal 100K ohm pull-up resistors on
each I/O pin that can be individually enabled. The
XRA1202P has the internal pull-up resistors enabled
upon power-up in case it is necessary for the inputs
to be in a known state.
In addition, the GPIOs on the XRA1202/1202P 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 XRA1202/1202P are enhanced versions of the
PCA9538. The XRA1202 is pin and software
compatible with the PCA9538 (note: software
registers are compatible to the PCA9538, but the I2C
slave address is different).
The XRA1202 is available in 16-pin QFN and 16-pin
TSSOP packages. The XRA1202P is available in the
16-pin QFN package.
FEATURES
1.65V to 3.6V operating voltage
8 General Purpose I/Os (GPIOs)
5V tolerant inputs
Maximum stand-by current of 1uA at +1.8V
I2C/SMBus bus interface
s I2C clock frequency up to 400kHz
s Noise filter on SDA and SCL inputs
s Up to 16 I2C Slave Addresses
Individually programmable inputs
s Internal pull-up resistors
s Polarity inversion
s Individual interrupt enable
s Rising edge and/or Falling edge interrupt
s Input filter
Individually programmable outputs
s Output Level Control
s Output Three-State Control
Open-drain active low interrupt output
Active-low reset input
Pin and software compatible with PCA9538
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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XRA1202 Datasheet Preview

XRA1202 Datasheet

8-BIT I2C/SMBUS GPIO EXPANDER

No Preview Available !

XRA1202/1202P
8-BIT I2C/SMBUS GPIO EXPANDER WITH RESET
FIGURE 1. XRA1202/1202P BLOCK DIAGRAM
VCC
(1.65V – 3.6V)
SCL
SDA
A1
A0
RESET#
IRQ#
GND
I2C/
SMBus
Interface
GPIO
Control
Registers
GPIOs
REV. 1.0.1
P0
P1
P2
P3
P4
P5
P6
P7
ORDERING INFORMATION
PART NUMBER
XRA1202IL16-F
XRA1202IL16TR-F
XRA1202PIL16-F
XRA1202PIL16TR-F
XRA1202IG16-F
XRA1202IG16TR-F
PACKAGE
QFN-16
QFN-16
QFN-16
QFN-16
TSSOP-16
TSSOP-16
NUMBER OF
GPIOS
8
8
8
8
8
8
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
-40°C to +85°C
-40°C to +85°C
DEVICE STATUS
Active
Active
Active
Active
Active
Active
FIGURE 2. PIN OUT ASSIGNMENTS
RESET#
P0
P1
P2
16 15 14 13
1 12
2
XRA1202/
XRA1202P
11
3 16-Pin QFN 10
SCL
IRQ#
P7
4 9 P6
5678
A0 1
A1 2
RESET# 3
P0 4
P1 5
P2 6
P3 7
GND 8
XRA1202
16-Pin TSSOP
16 VCC
15 SDA
14 SCL
13 IRQ#
12 P7
11 P6
10 P5
9 P4
2


Part Number XRA1202
Description 8-BIT I2C/SMBUS GPIO EXPANDER
Maker Exar
Total Page 16 Pages
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