|8-Bit I²C/SMBus GPIO Expander with Reset
|No. of GPIOs
|Interrupt Output Pin
|Reset Input Pin
|Integrated Level Shifters
|Internal Pull-Up Resistors Enabled at Power-up
|5V Tolerant Inputs
|Supply Voltage Range VCC (V)
|1.65V to 3.6V
|Max UART/GPIO Input Voltage (V)
|Max UART/GPIO Output Voltage (V)
|Temperature Range (°C)
|-40 to 85
The XRA1202 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.
In addition, the GPIOs on the XRA1202 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 is an enhanced version 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.
- 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 16 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 PCA9538
- 3kV HBM ESD protection per JESD22-A114F
- 200mA latch-up performance per JESD78B
- Personal Digital Assistants (PDA)
- Cellular Phones/Data Devices
- Battery-Operated Devices
- Global Positioning System (GPS)
Documentation & Design Tools
|XRA1202/1202P 8-BIT I2C/SMBUS GPIO Expander with Reset
|Schematics & Design Files
|Evaluation Board Schematic
Parts & Purchasing
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PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
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