MSP430FR2355TRHAT

Overview

The MSP430FR2355TRHAT is a member of Texas Instruments' MSP430FRxx FRAM microcontroller family, combining ultra-low power operation with non-volatile FRAM (Ferroelectric RAM) technology. Designed for battery-powered and energy-harvesting applications, it offers 16KB FRAM, 4KB SRAM, and a 16-bit RISC CPU clocked at 24MHz. Its integrated analog peripherals, including a 12-bit ADC and 10-bit DAC, make it suitable for sensor hubs and precision measurement systems. The device operates at voltages from 1.8V to 3.6V, with active power consumption as low as 100µA/MHz.

Structure and Working Principle

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The microcontroller features a modular architecture with a CPU core, memory subsystems, and configurable analog/digital peripherals interconnected via a unified memory bus. FRAM provides fast write speeds (125ns) and near-infinite write endurance (10^15 cycles), eliminating wear-out concerns common in flash-based MCUs. Peripherals include timers, UART/SPI/I2C interfaces, and a hardware multiplier for DSP operations. The low-power modes (LPM3/LPM4) reduce current draw to sub-µA levels, enabling years of operation on coin-cell batteries.

Key Features

Ultra-low power consumption stands out, with standby currents below 500nA and wake-up times under 5µs. The FRAM memory offers unified storage for code and data, simplifying software design compared to segmented flash/RAM architectures. Integrated analog features include a 12-bit SAR ADC with internal reference and a 10-bit DAC, reducing external component counts. Security features like memory protection and BSL (Bootloader) encryption enhance IoT device integrity.

Application Areas

Industrial: Flow meters, PLCs, and HMI panels benefit from the MCU's analog precision and low power. Medical: Portable monitors and infusion pumps leverage FRAM's reliability for critical data logging. IoT: Wireless sensor nodes (sub-GHz/BLE) use the device's energy efficiency for extended battery life. Consumer: Smart badges and wearables capitalize on fast wake-up and compact form factor (VQFN-40 package).

Maintenance and Precautions

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Avoid exceeding absolute maximum ratings (4.1V voltage, 85°C ambient temperature). Use ESD straps when handling the VQFN package. FRAM requires no special erase cycles but benefits from periodic refreshes in high-radiation environments. Debugging requires a 4-wire JTAG interface (e.g., TI MSP-FET tool). Firmware should manage clock transitions to prevent metastability during low-power mode exits.

B2B Procurement Guide

Authorized distributors (e.g., Digi-Key, Mouser) typically stock the MSP430FR2355TRHAT in tape-and-reel (TRHAT suffix). MOQs vary from 1k to 10k units, with lead times of 6-8 weeks for non-stock orders. Evaluate TI's WEBENCH® Designer for application-specific power/performance modeling. Consider development kits (MSP-EXP430FR2355) for prototyping. Tier-1 suppliers may offer firmware development support for large-volume contracts.