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Product Detailed Parameters
- Description：IC CTLR TOUCH SENSOR 8-DFN
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR)
- Type：Buttons
- Proximity Detection：Yes
- Number of Inputs：Up to 3
- LED Driver Channels：-
- Interface：I2C
- Resolution：-
- Voltage - Supply：1.71V ~ 2.75V
- Current - Supply：43µA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-UFDFN
- Supplier Device Package：8-USON (2x2)
- Grade：-
- Qualification：-
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Overview
The MPR031EPR2 is a proximity capacitive touch sensor controller manufactured by NXP USA Inc. (formerly Freescale). It operates on a 1.71V to 2.75V supply with an 8 μA supply current when monitoring two electrodes with interrupt functionality enabled. The device features an I2C interface and supports up to three touch pads, accommodating two electrodes with IRQ or three without. It includes continuous independent auto-calibration and separate touch/release trip thresholds for hysteresis. Packaged in a 2 x 2 x 0.65 mm 8-lead uDFN, it functions within a -40°C to +85°C temperature range.
Feature Summary
- Eliminates mechanical buttons to enhance reliability and reduce system cost
- Provides continuous independent auto-calibration for each electrode input
- Supports flexible electrode configurations including multiplexing
Applications
- PC peripherals
- MP3 players
- Remote controls
- Mobile phones
- Lighting controls
Procurement Notes
Verify the manufacturer origin as NXP USA Inc., noting the historical association with Freescale Semiconductor. Confirm the specific package type matches the 8-lead uDFN requirement. Ensure the I2C interface compatibility aligns with the host system design. Check for any obsolescence notices regarding this component series.
Selection Notes
Select the MPR031EPR2 when designing low-power handheld electronics requiring proximity sensing. Choose this model if the application demands an extremely small footprint and operation below 2.75V. Consider the MPR032 variant only if dual-address I2C capability is required.
Part Context
This component belongs to the MPR03x family of proximity capacitive touch sensor controllers. These devices are CMOS-based state machines designed to simplify touch application development. They serve as direct replacements for mechanical switches in various consumer and industrial electronic products.
Replacement Considerations
The MPR032 serves as a functional alternative within the same family. It shares similar core capabilities but adds the ability to operate as a second address on the I2C bus. Verify if this additional addressing feature is necessary for the target system architecture.
