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Número de pieza | XRA1200 | |
Descripción | 8-BIT I2C/SMBUS GPIO EXPANDER | |
Fabricantes | Exar | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de XRA1200 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
No Preview Available ! XRA1200/1200P
8-BIT I2C/SMBUS GPIO EXPANDER
SEPTEMBER 2011
REV. 1.0.0
GENERAL DESCRIPTION
The XRA1200/1200P is an 8-bit GPIO expander with
an I2C/SMBus interface. After power-up, the
XRA1200 has internal 100K ohm pull-up resistors on
each I/O pin that can be individually enabled. The
XRA1200P have 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 XRA1200/1200P 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 XRA1200/1200P are enhanced versions of other
8-bit GPIO expanders with an I2C/SMBus interface.
The XRA1200 is pin and software compatible with the
CAT9534 and PCA9534. The XRA1200P is pin and
software compatible with the CAT9554 and
PCA9554. The XRA1200/1200P are also pin
compatible with the PCA9554A and TCA9554A.
The XRA1200/1200P are available in 16-pin QFN
and 16-pin TSSOP packages.
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
■ 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 CAT9534,
CAT9554, PCA9534, and PCA9554
• 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
XRA1200/1200P
8-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
XRA1200/1200P 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
XRA1200/1200P
8-BIT I2C/SMBUS GPIO EXPANDER
ELECTRICAL CHARACTERISTICS
DC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA = -40O TO +85OC, VCC IS 1.65V TO 3.6V
SYMBOL
PARAMETER
VIL Input Low Voltage
VIL Input Low Voltage
VIH Input High Voltage
VIH Input High Voltage
VOL Output Low Voltage
VOL Output Low Voltage
VOL Output Low Voltage
VOH Output High Voltage
IIL
IIH
ICC
ICC
ICCS
CIN
RGPIO
Input Low Leakage Current
Input High Leakage Current
Power Supply Current
Power Supply Current
Standby Current
Input Pin Capacitance
GPIO pull-up resistance
LIMITS
1.8V ± 10%
MIN MAX
-0.3 0.3VCC
-0.3 0.2
1.3 VCC
1.4 5.5
0.4
0.5
0.4
1.2
±10
±10
50
150
1
5
60 140
LIMITS
2.5V ± 10%
MIN MAX
-0.3 0.3VCC
-0.3 0.5
1.8 VCC
1.8 5.5
0.4
0.5
0.4
1.8
±10
±10
100
250
2
5
60 140
LIMITS
3.3V ± 10%
MIN MAX
UNITS
CONDITIONS
-0.3 0.3VCC V Note 1
-0.3 0.8
V Note 2
2.3 VCC V Note 1
2.0 5.5 V Note 2
0.4 V IOL = 3 mA
V IOL = 3 mA
V IOL = 3 mA
Note 3
0.5 V IOL = 8 mA
Note 4
0.4 V IOL = 6 mA
V IOL = 4 mA
V IOL = 1.5 mA
Note 5
2.6 V IOH = -8 mA
V IOH = -8 mA
V IOH = -8 mA
Note 4
±10 uA
±10 uA
200 uA Test 1
500 uA Test 2
5 uA Test 3
5 pF
60 140 kΩ 100kΩ ± 40%
NOTES:
1. For I2C input signals (SDA, SCL);
2. For GPIOs, A0, A1 and A2 signals;
3. For I2C output signal SDA;
4. For GPIOs;
5. For IRQ# signal;
Test 1: SCL frequency is 400 KHz with internal pull-ups disabled. All GPIOs are configured as inputs. All inputs are steady
at VCC or GND. Outputs are floating or in the tri-state mode.
11
11 Page |
Páginas | Total 16 Páginas | |
PDF Descargar | [ Datasheet XRA1200.PDF ] |
Número de pieza | Descripción | Fabricantes |
XRA1200 | 8-BIT I2C/SMBUS GPIO EXPANDER | Exar |
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