XRA1200IL16MTR-F

Overview

The XRA1200IL16MTR-F is an 8-bit I2C/SMBus GPIO expander manufactured by MaxLinear. It operates within a supply voltage range of 1.65V to 3.6V and supports I2C clock frequencies up to 400kHz. The device features 8 general-purpose I/Os with individually programmable inputs and outputs, including internal pull-up resistors and polarity inversion capabilities. It provides open-drain active-low interrupt output and includes input filters for noise suppression. The component is housed in a 16-pin QFN package (3x3mm) with an exposed thermal pad, designed for surface mount installation across an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports I2C and SMBus interfaces with up to 32 selectable slave addresses via hardware pins.
• Features individually programmable GPIOs with configurable internal pull-ups, polarity inversion, and three-state control.
• Provides flexible interrupt generation on rising or falling edges with programmable input filtering.

Applications

• Personal Digital Assistants (PDA)
• Cellular Phones and Data Devices
• Battery-Operated Devices
• Global Positioning System (GPS)
• Bluetooth

Procurement Notes

Verify the specific ordering suffix 'MTR' indicates tape and reel packaging when sourcing components. Confirm that the manufacturer designation aligns with MaxLinear, as the original datasheet references Exar Corporation prior to acquisition. Ensure compatibility with existing I2C bus protocols and address configurations during procurement planning.

Selection Notes

Select this component for applications requiring low-power expansion of digital I/O lines over an I2C bus. Consider the 1.65V minimum operating voltage for battery-powered systems. Verify that the 16-pin QFN package fits the PCB footprint constraints and that the exposed pad can be properly soldered for thermal management.

Part Context

This part belongs to the XRA1200 series of 8-bit GPIO expanders. It is pin and software compatible with the CAT9534, PCA9534, CAT9554, and PCA9554 devices. The 'IL16' designation specifies the 16-pin QFN package variant, while the 'MTR' suffix denotes the tape and reel packaging format for automated assembly.

Replacement Considerations

Pin-compatible alternatives include the CAT9534, PCA9534, CAT9554, and PCA9554. Verify register mapping and electrical characteristics such as leakage current and drive strength before substitution to ensure functional equivalence in the target circuit design.

FAQ

How are the I2C slave addresses configured?

The device supports up to 32 unique I2C slave addresses, which are selected by connecting the A0, A1, and A2 address pins to either VCC or GND.

What is the default state of the internal pull-up resistors upon power-up?

For the standard XRA1200 variant, the internal pull-up resistors are disabled upon power-up. They must be explicitly enabled via the Input Internal Pull-up Enable/Disable Register (PUR).

How is the interrupt status cleared?

The input interrupt can be cleared by reading the GPIO State Register (GSR) or if the input changes back to its previous state, depending on the configuration of the Interrupt Enable Registers.