Overview
| Information | 16-Bit I2C/SMBus GPIO Expander with Reset |
|---|---|
| CPU Interface | I2C/SMBus |
| No. of GPIOs | 8 |
| 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) | 1.62V to 5.5V |
| Max UART/GPIO Input Voltage (V) | 5.5 |
| Max UART/GPIO Output Voltage (V) | VCC |
| Temperature Range (°C) | -40 to 85 |
| Package | QFN-16 |
The MxL82212 is a 8-bit GPIO expander with an I2C/SMBus interface. The MxL82212 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 MxL82212 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 device, but it 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 MxL82212 is 16-pin QFN. It is pin and software compatible with the PCA9538 (note that the software registers are compatible to the PCA9538, but the I2C slave address is different).
1.62V to 5.5V operating voltage
8 General Purpose I/Os (GPIOs)
Maximum stand-by current of 1uA at +1.8V
I²C/SMBus bus interface
I²C clock frequency up to 1MHz
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
Active-low reset input
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)
Bluetooth
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | 8-bit I2C/SMBUS GPIO Expander with Reset | R01 | June 2026 | 910.9 KB |
| Product Brochures | Serial Transceivers & Bridges Brochure | R03 | May 2025 | 3.6 MB |
Parts & Purchasing
| Part Number | Min Temp | Max Temp | Status |
|---|---|---|---|
| MXL82212I-AQB-R | -40 | 85 | PRE |
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.
