MPR084QR2

Overview

The MPR084QR2 is an I2C-driven capacitive touch sensor controller designed for managing eight-key capacitive array sensors. It operates within a voltage range of 1.8 V to 3.6 V and supports a working temperature range from -40°C to +85°C. The device features low power consumption, with average operating currents of 41 µA at a 1-second response time or 150 µA when monitoring all touchpads, and standby currents as low as 1 µA to 2 µA. It utilizes a 16-pin QFN package measuring 5 mm x 5 mm x 1 mm height.

Feature Summary

• Supports multiple deployment methods through three distinct output mechanisms and extensive configuration options.
• Includes dedicated anti-mis-touch technology to reject multi-key detection caused by EMI events such as PA bursts.
• Features FIFO buffering to minimize access time and IRQ output capabilities for efficient data handling.

Applications

• Control panels and switch replacements
• Home appliances and computer peripherals
• Access control systems and remote controls

Procurement Notes

Verify the specific suffix QR2 against official NXP documentation to confirm the exact tape-and-reel packaging quantity and RoHS compliance status. Ensure the ordering part number matches the required 16-pin QFN variant. Cross-reference the datasheet revision date to confirm current availability and any potential design-in notices or lifecycle changes.

Selection Notes

Select this component for applications requiring an I2C interface to replace mechanical switches with capacitive sensing. Consider the 1.8 V to 3.6 V supply requirement and the -40°C to +85°C operating range. Evaluate the 41 µA average current consumption against system power budgets. Verify that the 16-pin QFN footprint fits the PCB layout constraints.

Part Context

The MPR084 series consists of capacitive touch sensor controllers manufactured by NXP (formerly Freescale Semiconductor). These devices are engineered to detect target presence without physical contact, serving as modern alternatives to traditional mechanical buttons. The series offers configurable real-time auto-calibration and supports driving sound elements to simulate mechanical key clicks.

Replacement Considerations

Publicly confirmed substitute part numbers for the MPR084QR2 were not identified in available documentation. Designers should consult NXP support for direct equivalents or updated product recommendations if this component is discontinued or unavailable.