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PDF XRA1201 Data sheet ( Hoja de datos )
| Número de pieza | XRA1201 | |
| Descripción | 16-BIT I2C/SMBUS GPIO EXPANDER | |
| Fabricantes | Exar | |
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XRA1201/1201P
16-BIT I2C/SMBUS GPIO EXPANDER
SEPTEMBER 2011
REV. 1.0.0
GENERAL DESCRIPTION
The XRA1201/1201P is a 16-bit GPIO expander with
an I2C/SMBus interface. After power-up, the
XRA1201 has internal 100K ohm pull-up resistors on
each I/O pin that can be individually enabled. The
XRA1201P 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 XRA1201/1201P 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 XRA1201/1201P are enhanced versions of other
16-bit GPIO expanders with an I2C/SMBus interface.
The XRA1201 is pin and software compatible with the
PCA9535, TCA9535 and MAX7312. The XRA1201P
is pin and software compatible with the CAT9555,
PCA9555, TCA9555, MAX7311 and MAX7318.
The XRA1201/1201P are available in 24-pin QFN
and 24-pin TSSOP packages.
FEATURES
• 1.65V to 3.6V operating voltage
• 16 General Purpose I/Os (GPIOs)
• 5V tolerant inputs
• Maximum stand-by current of 1uA at +1.8V
• I2C/SMBus bus interface
■ I2C clock frequency up to 400kHz
■ Noise filter on SDA and SCL inputs
■ Up to 32 I2C Slave Addresses
• 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
• Pin and software compatible with PCA9535,
TCA9535, MAX7312 (XRA1201)
• Pin and software compatible with CAT9555,
PCA9555, TCA9555, MAX7311 and MAX7318
(XRA1201P)
• 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
1 page  
REV. 1.0.0
1.1.1 I2C-bus Addressing
XRA1201/1201P
16-BIT I2C/SMBUS GPIO EXPANDER
There could be many devices on the I2C-bus. To distinguish itself from the other devices on the I2C-bus, the
XRA1201/1201P has up to 32 I2C slave addresses using the A2-A0 address lines. Table 1 below shows the
different addresses that can be selected.
TABLE 1: I2C ADDRESS MAP
A2
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
A1
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
GND
GND
VCC
VCC
GND
GND
VCC
VCC
GND
GND
VCC
VCC
GND
GND
VCC
VCC
A0
GND
VCC
GND
VCC
GND
VCC
GND
VCC
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
GND
VCC
GND
VCC
GND
VCC
GND
VCC
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
I2C ADDRESS
0x20 (0010 000X)
0x22 (0010 001X)
0x24 (0010 010X)
0x26 (0010 011X)
0x28 (0010 100X)
0x2A (0010 101X)
0x2C (0010 110X)
0x2E (0010 111X)
0x30 (0011 000X)
0x32 (0011 001X)
0x34 (0011 010X)
0x36 (0011 011X)
0x38 (0011 100X)
0x3A (0011 101X)
0x3C (0011 110X)
0x3E (0011 111X)
0x40 (0100 000X)
0x42 (0100 001X)
0x44 (0100 010X)
0x46 (0100 011X)
0x48 (0100 100X)
0x4A (0100 101X)
0x4C (0100 110X)
0x4E (0100 111X)
0x50 (0101 000X)
0x52 (0101 001X)
0x54 (0101 010X)
0x56 (0101 011X)
0x58 (0101 100X)
0x5A (0101 101X)
0x5C (0101 110X)
0x5E (0101 111X)
5
5 Page 
REV. 1.0.0
XRA1201/1201P
16-BIT I2C/SMBUS GPIO EXPANDER
ABSOLUTE MAXIMUM RATINGS
Power supply voltage
Supply current
Ground current
External current limit of each GPIO
Total current limit for GPIO[15:8] and GPIO[7:0]
Total current limit for GPIO[15:0]
Total supply current sourced by all GPIOs
Operating Temperature
Storage Temperature
Power Dissipation
3.6 Volts
160 mA
200 mA
25 mA
100 mA
200 mA
160 mA
-40o to +85oC
-65o to +150oC
200 mW
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%)
Thermal Resistance (24-QFN)
Thermal Resistance (24-TSSOP)
theta-ja = 38oC/W, theta-jc = 26oC/W
theta-ja = 84oC/W, theta-jc = 16oC/W
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet XRA1201.PDF ] | |
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