Equivalent & Substitute Parts for MPR032EPR2

Part Overview

The MPR032EPR2 is a capacitive touch sensor controller manufactured by NXP USA Inc., designed for proximity detection applications with up to 3 input channels. This 8-USON (2x2) surface mount device operates over a supply voltage range of 1.71V to 2.75V and communicates via I2C interface. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

MPR032EPR2

NXP USA Inc.In Stock: 1319MPR032EPR2 Datasheet

Current PartRFQ

CAP1293-1-AC3-TR

Microchip TechnologyIn Stock: 2833CAP1293-1-AC3-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPR032EPR2 is based on the following critical parameters:

• Functional Capability: Capacitive touch sensor controller with proximity detection
• Input Channels: Minimum 3 channels required
• Communication Protocol: I2C interface compatibility
• Mounting Technology: Surface mount package
• Supply Voltage Compatibility: Operating voltage range must accommodate system requirements
• Operating Temperature Range: Must support -40°C to 85°C minimum
• Regulatory Compliance: ROHS3 compliance required

The CAP1293-1-AC3-TR from Microchip Technology meets these substitution criteria as an active product with equivalent functional specifications and superior environmental ratings.

Parameter Comparison

Engineering Selection Recommendations

The CAP1293-1-AC3-TR is the designated substitute for the obsolete MPR032EPR2. Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

The CAP1293-1-AC3-TR offers extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) and superior moisture sensitivity rating (MSL 1 unlimited versus MSL 3 at 168 hours), providing enhanced reliability for production environments. The substitute device supports both I2C and SMBus protocols, maintaining backward compatibility with I2C-based system architectures.

Supply voltage requirements differ between the two devices. The MPR032EPR2 operates at 1.71V to 2.75V, while the CAP1293-1-AC3-TR requires 3V to 5.5V. System power supply design must accommodate this voltage differential. Supply current consumption increases from 43µA to 500µA with the substitute part.

Package geometry differs: the MPR032EPR2 uses 8-UFDFN (2x2), while the CAP1293-1-AC3-TR uses 8-WFDFN (2x3) with exposed pad. PCB layout modifications are required for package transition.

Frequently Asked Questions (FAQ)

Q: Can the CAP1293-1-AC3-TR directly replace the MPR032EPR2 without design modifications?

A: Direct socket replacement is not possible due to package geometry differences (8-UFDFN versus 8-WFDFN) and supply voltage requirements (1.71V-2.75V versus 3V-5.5V). PCB layout redesign and power supply adjustment are required.

Q: What are the key compatibility factors for substitution?

A: Functional compatibility is established through matching capacitive touch sensor architecture, 3-channel input capability, I2C communication protocol, surface mount technology, and regulatory compliance (ROHS3). Electrical and mechanical parameters must be evaluated within system constraints.

Q: How do the supply voltage ranges affect system design?

A: The MPR032EPR2 operates at lower voltage (1.71V-2.75V), suitable for battery-powered applications. The CAP1293-1-AC3-TR requires higher voltage (3V-5.5V), typical for standard logic supply rails. System power architecture must be verified for compatibility.

Q: What is the significance of the MSL rating difference?

A: MSL 3 (168 hours) for the MPR032EPR2 indicates moisture sensitivity requiring controlled storage and handling. MSL 1 (unlimited) for the CAP1293-1-AC3-TR eliminates moisture-related constraints, reducing production handling complexity and improving shelf life management.

Q: Are there interface protocol differences between the two devices?

A: Both devices support I2C communication. The CAP1293-1-AC3-TR additionally supports SMBus protocol, providing expanded compatibility with SMBus-capable host systems while maintaining I2C backward compatibility.