|Information||8-Bit I²C/SMBus GPIO Expander with Reset|
|Supply Voltage Range VCC (V)||1.65V to 3.6V|
|5V Tolerant Inputs||✔|
|Max UART/GPIO Input Voltage (V)||5.5|
|Max UART/GPIO Output Voltage (V)||VCC|
|No. of GPIOs||8|
|Interrupt Output Pin||✔|
|Reset Input Pin||✔|
|Integrated Level Shifters|
|Internal Pull-Up Resistors Enabled at Power-up||✔|
|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
|Schematics & Design Files||Evaluation Board Schematic||1.0||October 2011||83.3 KB|
|Product Brochures||Interface Brochure||October 2019||1.3 MB|
Parts & Purchasing
|Part Number||Pkg Code||Status||Suggested Replacement||PDN|
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
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.
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Submit a Technical Support Question As a New Question
Find the product page of the part that you want to get an evaluation board for and click on Parts & Purchasing. Example:
Find the icons under Buy Now or Order Samples:
Click on the Buy Now icon and see who has stock and click on the Buy button:
Alternatively, you can click on the Order Samples
If the icons are missing, then contact Customer Support.
In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:
Notice the status column and the “Show obsolete parts” link. A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:
Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:
And then Product Change Notifications:
Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:
If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.