STMPE812ABJR

Overview

The STMPE812ABJR is a 4-wire resistive touchscreen controller featuring an integrated 4-bit port expander. It operates autonomously with minimal CPU intervention for sampling, filtering, and preprocessing. The device includes a 12-bit ADC, PWM controller, and GPIO outputs. It supports I2C communication and functions within a supply voltage range of 1.65 V to 3.6 V.

Feature Summary

• Autonomous 4-wire resistive touchscreen controller
• Integrated 4-bit port expander (GPIO)
• 12-bit ADC with internal charge pump
• I2C interface with configurable address

Applications

• Resistive touchscreen interfaces
• Portable electronic devices
• Industrial control panels

Procurement Notes

Verify the specific package type and tape-and-reel configuration against the official STMicroelectronics datasheet or authorized distributor documentation before ordering. Confirm that the 'ABJR' suffix corresponds to the required packaging and temperature grade for the intended application environment.

Selection Notes

Select this component for applications requiring autonomous touch sensing with low host CPU overhead. Ensure the design accommodates the 1.65 V to 3.6 V supply range and utilizes the integrated 12-bit ADC for auxiliary analog inputs if needed. Consider the GPIO expansion capabilities to reduce system pin count.

Part Context

This part belongs to the STMPE series of touch controllers from STMicroelectronics. It is designed to offload touch processing tasks from the main processor, allowing for efficient power management and simplified software architecture in embedded systems.

Replacement Considerations

Consult the official STMicroelectronics product selector guide for verified cross-reference parts. Ensure any substitute maintains compatibility with 4-wire resistive touchscreens, I2C communication, and the required operating voltage range.