Texas Instruments MSP430FR2512IPW16

Overview

MSP430FR2512IPW16 from Texas Instruments is a 16-pin TSSOP ultra-low-power mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing, featuring 4 self- or mutual-capacitance electrodes, 7.25 KB FRAM + 256 B info FRAM, and 2 KB RAM. It operates from 1.8 V to 3.6 V, achieves <4 µA wake-on-touch current with two sensors, and targets cost-sensitive industrial HMI applications such as smart locks and appliance control panels.

For engineers reviewing the MSP430FR2512IPW16 datasheet, MSP430FR2512IPW16 pinout, MSP430FR2512IPW16 application, or MSP430FR2512IPW16 equivalent, key selection criteria include electrode count (4 vs. 8 on FR2522), TSSOP-16 package compatibility, FRAM endurance (10¹⁵ cycles), IEC-61000-4-2/4-4/4-6 compliance, and wake-on-touch state machine support for low-power HMI designs.

Technical Context

The MSP430FR2512IPW16 implements a dedicated hardware-accelerated CapTIvate module supporting up to four capacitive sensing channels (CAP0.0–CAP0.3) with built-in spread spectrum, automatic tuning, noise filtering, and debouncing-enabling reliable operation under 10-V RMS common-mode noise and 4-kV EFT. Its 16-bit RISC CPU runs at up to 16 MHz using an on-chip DCO with ±1% accuracy at room temperature and supports active mode at 120 µA/MHz.

Power management includes LPM4.5 shutdown at 36 nA (no SVS), standby at <4 µA wake-on-touch, and LPM3.5 domain retention for backup memory. The device integrates one eUSCI_A (UART/IrDA/SPI), one eUSCI_B (SPI/I²C), dual Timer_A3 modules (each with three capture/compare registers), and an 8-channel 10-bit ADC sampling at 200 ksps with internal 1.5-V reference.

Key Specifications

Pinout & Package

TSSOP-16 package (PW) with 5 mm × 4.4 mm body size, 0.65 mm pitch, and exposed thermal pad (not electrically connected). Pinout optimized for capacitive touch routing with dedicated VREG decoupling (1 µF, ≤200 mΩ ESR) and separate DVCC/DVSS power pair.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar capacitive touch microcontroller applications.

Compared with MSP430FR2522IPW16, the MSP430FR2512IPW16 reduces electrode count and GPIOs to lower cost and power, while MSP430FR2632IPW16 trades raw channel count for security primitives - making the MSP430FR2512IPW16 optimal for cost-driven, single-function touch interfaces where four buttons suffice.

Availability

MSP430FR2512IPW16 is available at Aetrix Electronics and suitable for smart lock keypads, appliance control panels, and video doorbells requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for MSP430FR2512IPW16 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The MSP430FR25x2 product line delivers ultra-low-power capacitive touch MCUs with integrated CapTIvate technology for cost-sensitive HMI applications requiring robustness against moisture, oil, and EMI - targeting smart home, building automation, and white goods.

FAQ

What is the maximum number of capacitive touch channels supported by the MSP430FR2512IPW16?

The MSP430FR2512IPW16 supports up to four capacitive touch channels: CAP0.0, CAP0.1, CAP0.2, and CAP0.3. Unlike the MSP430FR2522IPW16, it does not implement CAP1.x channels. This configuration is validated for small keypads, proximity wake-up, and single-axis sliders - all within the device's hardware-accelerated CapTIvate engine.

Does the MSP430FR2512IPW16 support wake-on-touch functionality, and what is its typical current draw in that mode?

Yes, the MSP430FR2512IPW16 supports hardware wake-on-touch with a typical current draw of <4 µA when monitoring two capacitive sensors. This is achieved using the dedicated CapTIvate state machine that performs electrode scanning autonomously while the CPU remains in LPM4 sleep - enabling multi-year battery life in coin-cell powered devices like video doorbells.

Can the MSP430FR2512IPW16 operate with an external 32-kHz crystal, and which pins are used?

Yes, the MSP430FR2512IPW16 supports an external 32-kHz crystal oscillator (LFXT) for high-accuracy RTC operation. Pins P2.1 (XIN) and P2.0 (XOUT) are dedicated to this function and must be connected to the crystal with appropriate load capacitors per TI's layout guidelines in SLASEE4C Section 7.1.

What is the FRAM endurance specification for the MSP430FR2512IPW16, and how does it compare to traditional flash memory?

The MSP430FR2512IPW16 features ferroelectric RAM (FRAM) with 10¹⁵ write cycle endurance - exceeding standard flash memory (typically 10⁴–10⁵ cycles) by ten orders of magnitude. This enables frequent data logging, over-the-air firmware updates, and real-time parameter storage without wear leveling - critical for appliances and industrial HMIs with daily usage cycles.

Is the MSP430FR2512IPW16 pin-compatible with the MSP430FR2522IPW16, and what are the functional trade-offs?

Yes, the MSP430FR2512IPW16 is pin-compatible with the MSP430FR2522IPW16 in the TSSOP-16 package. However, the MSP430FR2512IPW16 omits CAP1.x channels and reduces ADC inputs from 8 to 5, limiting multi-electrode designs. Both share identical power, clock, and communication peripherals - making the MSP430FR2512IPW16 a cost-optimized variant for simpler touch interfaces.