Texas Instruments MSP430FR2155TDBTR

Overview

MSP430FR2155TDBTR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller with 32KB program FRAM, 512B data FRAM, and 4KB RAM, operating from 1.8 V to 3.6 V across –40°C to 105°C. It integrates a 12-bit SAR ADC (200 ksps), two enhanced comparators with 6-bit DAC reference, dual eUSCI_A (UART/IrDA/SPI) and dual eUSCI_B (SPI/I²C), and Timer_B modules for sensor signal conditioning in battery-powered industrial safety devices.

For engineers reviewing the MSP430FR2155TDBTR datasheet, MSP430FR2155TDBTR pinout, MSP430FR2155TDBTR application, or MSP430FR2155TDBTR equivalent, key selection criteria include its TSSOP-38 package, FRAM endurance (10¹⁵ writes), LPM3.5 current (620 nA), 24-MHz DCO accuracy (±1%), and integrated analog peripherals enabling single-chip sensor node design without external op-amps or DACs.

Technical Context

The MSP430FR2155TDBTR implements a 16-bit RISC CPU with constant generator and 24-MHz digitally controlled oscillator (DCO) locked via FLL to internal or external references. Its memory subsystem uses ferroelectric RAM with built-in ECC and configurable write protection, supporting unified program/data/storage space and eliminating flash erase cycles.

Analog functionality centers on a 12-channel 12-bit SAR ADC with internal 1.5/2.0/2.5-V reference, two programmable-hysteresis comparators (one with 100-ns response, one with 1.5-µA low-power mode), and ROM-resident driver/FFT libraries - all optimized for deterministic real-time sensor acquisition at sub-µA standby currents.

Key Specifications

Pinout & Package

TSSOP-38 (DBT) package with 34 general-purpose I/O pins, 4 dedicated power/ground pins (DVCC/DVSS), 2 JTAG/SBW debug pins (SBWTCK/SBWTDIO), 2 reset pins (RST/NMI), and dual crystal oscillator connections (XIN/XOUT). Thermal pad not present in TSSOP variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2153TDBTR, the MSP430FR2155TDBTR provides double FRAM and RAM for larger firmware or extended data logging, while MSP430FR2355TDBTR adds analog signal-chain flexibility at higher unit cost - making MSP430FR2155TDBTR optimal for balanced sensor-node cost/performance targets.

Availability

MSP430FR2155TDBTR is available at Aetrix Electronics and suitable for smoke detectors, sensor transmitters, circuit breakers, and battery pack management systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MSP430FR2155TDBTR 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The MSP430FR215x product line delivers ultra-low-power, FRAM-based microcontrollers optimized for sensing, measurement, and battery-operated industrial safety applications - emphasizing reliability, longevity, and analog integration.

FAQ

What is the maximum operating frequency of the MSP430FR2155TDBTR?

The MSP430FR2155TDBTR features a digitally controlled oscillator (DCO) with frequency-locked loop (FLL) that operates up to 24 MHz. This maximum frequency is achievable across the full –40°C to 105°C temperature range and 1.8 V to 3.6 V supply voltage, with ±1% accuracy at room temperature using the on-chip reference. The MSP430FR2155TDBTR's clock system supports programmable prescalers for MCLK and SMCLK to adapt timing to peripheral requirements without sacrificing CPU performance.

Does the MSP430FR2155TDBTR support hardware CRC calculation?

Yes, the MSP430FR2155TDBTR includes a dedicated 16-bit cyclic redundancy checker (CRC) module. This hardware accelerator computes CRC-16 over memory blocks or data streams without CPU intervention, reducing firmware overhead during firmware updates, data logging integrity checks, or communication packet validation. The CRC engine operates independently of the CPU and supports both memory-mapped and peripheral-triggered operation modes as defined in the MSP430FR2xx Family User's Guide.

How many I/O pins does the MSP430FR2155TDBTR provide in its TSSOP-38 package?

The MSP430FR2155TDBTR in TSSOP-38 (DBT) package provides 34 general-purpose I/O pins distributed across ports P1 through P6. Of these, 32 pins (P1.x, P2.x, P3.x, P4.x) support pin-interrupt capability and can wake the device from all low-power modes including LPM4.5. The remaining two pins are dedicated to the Spy-Bi-Wire debug interface (SBWTCK and SBWTDIO), which are multiplexed with GPIO but reserved for programming and debugging by default.

What analog peripherals are integrated into the MSP430FR2155TDBTR?

The MSP430FR2155TDBTR integrates a 12-bit SAR ADC with up to 12 single-ended input channels and 200 ksps sample rate, two enhanced comparators (eCOMP0/eCOMP1) with programmable hysteresis and internal 6-bit DAC reference, and shared internal voltage references (1.5 V, 2.0 V, 2.5 V). Unlike the MSP430FR235x series, it does not include Smart Analog Combo (SAC) modules - confirming its role as a cost-optimized variant focused on essential analog sensing without programmable-gain amplifier functionality.

Is the MSP430FR2155TDBTR qualified for extended temperature operation?

Yes, the MSP430FR2155TDBTR is fully specified for operation from –40°C to 105°C ambient temperature. This extended temperature range is validated across all electrical parameters including active and low-power mode currents, ADC accuracy, oscillator stability, and FRAM retention. The qualification enables use in demanding industrial environments such as circuit breaker panels, outdoor sensor housings, and battery packs where thermal stress exceeds standard commercial-grade limits - and is explicitly confirmed in TI's Device Information table for the MSP430FR2155TDBT part number.