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Texas Instruments MSP430FR2155TRSMT
- Part No.:
- MSP430FR2155TRSMT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR2155TRSMT.pdf
- Description:
- IC MCU 16BIT 32KB FRAM 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
MSP430FR2155TRSMT from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller designed for industrial sensing and battery-powered measurement systems. It integrates 32KB program FRAM, 4KB RAM, a 12-bit 200-ksps SAR ADC, two enhanced comparators with integrated 6-bit DACs, and dual eUSCI_A/eUSCI_B modules supporting UART/I²C/SPI. It operates from 1.8 V to 3.6 V across –40°C to 105°C and targets smoke detectors, sensor transmitters, and circuit breakers.
For engineers reviewing the MSP430FR2155TRSMT datasheet, MSP430FR2155TRSMT pinout, MSP430FR2155TRSMT application, or MSP430FR2155TRSMT equivalent, key selection criteria include its LPM3.5 current (620 nA), FRAM endurance (1015 writes), 40-pin VQFN package with 36 I/Os, and absence of Smart Analog Combo (SAC) modules - distinguishing it from MSP430FR235x variants.
Technical Context
The MSP430FR2155TRSMT implements a 16-bit RISC CPU with 24-MHz DCO+FLL clock system, including REFO, VLO, MODOSC, and support for external 32-kHz and up-to-24-MHz crystals. Its power management module enables six low-power modes, with LPM3.5 retaining RTC and backup memory functionality at 620 nA while disabling all other peripherals.
It features two independent enhanced USCI modules (eUSCI_A0/A1 for UART/IrDA/SPI; eUSCI_B0/B1 for SPI/I²C), three Timer_B3 instances (each with 3 capture/compare registers), one Timer_B7 (7 registers), and a dedicated 16-bit RTC counter - all synchronized via a unified clock distribution network with programmable prescalers for MCLK and SMCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with constant generator; enables high code efficiency and deterministic interrupt latency under 10 µs wake-up from LPM. |
| Memory | 32KB FRAM (program + constants + data), 512B data FRAM, 4KB SRAM; unified nonvolatile memory eliminates flash erase delays and supports true EEPROM-like byte-write capability. |
| ADC | 12-bit SAR ADC with 12 input channels, 200 ksps sample rate, internal 1.5/2.0/2.5-V references; supports single-ended acquisition with configurable sample-and-hold timing. |
| Low-Power Modes | LPM3.5 draws 620 nA (with SVS enabled, 32-kHz crystal); LPM4.5 draws 42 nA (SVS disabled); enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Operating Voltage | 1.8 V to 3.6 V; wide range accommodates aging batteries and unregulated power supplies without external regulators in portable industrial sensors. |
| Temperature Range | –40°C to 105°C; qualified for harsh environments including smoke detectors, circuit breakers, and outdoor sensor transmitters. |
| I/O Count | 36 GPIO pins in 40-pin VQFN (RHA) package; 32 pins support interrupt/wakeup from all LPMs, enabling responsive event-driven firmware. |
Pinout & Package
Package: 40-pin VQFN (RHA), 6 mm × 6 mm, exposed thermal pad (to be connected to DVSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 6–12, 14–16, 18–24, 26–36, 38–40 | GPIO / Peripheral Multiplexed I/O | Configurable as digital I/O, timer capture/compare, UART/I²C/SPI signals, ADC inputs, comparator inputs/outputs, or OA inputs - supports flexible peripheral routing without external logic. |
| 5 (TEST/SBWTCK) | Spy-Bi-Wire Clock Input | Enables debug programming and boundary-scan testing using 2-wire interface; shares pin with SBWTCK for minimal footprint JTAG-alternative debugging. |
| 7 (RST/NMI/SBWTDIO) | Reset / NMI Input / SBW Data I/O | Combines reset assertion, non-maskable interrupt, and bidirectional debug data line - reduces pin count while maintaining full debug visibility and fault recovery. |
| 8 (DVCC), 9 (DVSS) | Digital Power Supply Pair | Primary power domain for CPU, FRAM, RAM, and digital peripherals; requires 4.7–10 µF bulk + 0.1 µF ceramic decoupling per supply pair for stable low-noise operation. |
| 10 (P2.7/TB0CLK/XIN), 11 (P2.6/MCLK/XOUT) | LFXT Crystal Interface | Supports external 32.768-kHz crystal for precision RTC and low-power timing; XIN/XOUT pins are internally biased and require no external load capacitors when used with TI-recommended crystals. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 32KB program + 512B data FRAM with ECC, 1015 write cycles, and <100-ns write time - eliminates flash wear-out concerns and enables real-time data logging in safety-critical systems. |
| Ultra-Low-Power Operation | LPM3.5 current of 620 nA with 32-kHz crystal active allows decade-scale battery life in wireless sensor nodes and smoke detectors without compromising RTC accuracy. |
| Integrated Analog Peripherals | 12-bit 200-ksps ADC with internal reference options and two eCOMP modules (one with 100-ns response, one with 1.5-µA low-power mode) - reduces BOM by eliminating discrete comparators and reference ICs. |
| Communication Flexibility | Dual eUSCI_A (UART/IrDA/SPI) and dual eUSCI_B (SPI/I²C) modules enable concurrent wired protocols - supports isolated RS-485 gateways, I²C sensor hubs, and infrared remote interfaces in one chip. |
| ROM Library Support | 20KB on-chip ROM includes driver libraries (GPIO, UART, I²C, ADC) and FFT routines - accelerates firmware development and reduces code size in resource-constrained embedded applications. |
Applications
| Smoke and Heat Detectors | Sensor Transmitters |
|---|---|
Use Scenario: Standalone battery-powered smoke alarm with optical chamber, temperature compensation, and wireless alert transmission. IC Role / Device Role / Timing Role: Main system controller executing smoke detection algorithm, managing ADC sampling of photodiode and thermistor, driving buzzer, and handling RF wakeup protocol timing. Use Value: LPM3.5 current of 620 nA extends 10-year lithium battery life; FRAM enables reliable event logging (e.g., false-alarm triggers) without flash endurance limits. |
Use Scenario: Industrial 4–20 mA or LoRaWAN transmitter for pressure, humidity, or gas sensors in hazardous locations. IC Role / Device Role / Timing Role: Signal conditioner and protocol stack processor - digitizes analog sensor output, applies linearization, and formats data for wired/wireless transmission. Use Value: Integrated 12-bit ADC with internal references and 200-ksps rate eliminates external ADC; dual eUSCI modules support simultaneous HART modulation and sensor bus communication. |
| Circuit Breakers | Battery Pack Management |
Use Scenario: DIN-rail mounted electronic trip unit monitoring current, voltage, and temperature for overload/short-circuit protection. IC Role / Device Role / Timing Role: Real-time protection engine performing RMS current calculation, thermal modeling, and trip decision within strict 20-ms window. Use Value: 24-MHz DCO+FLL delivers deterministic timing; 32KB FRAM stores calibration coefficients and trip history with instant write capability - critical for post-fault diagnostics. |
Use Scenario: Smart Li-ion battery pack with cell voltage monitoring, temperature sensing, and SMBus/HDQ communication to host system. IC Role / Device Role / Timing Role: Battery monitor MCU acquiring cell voltages via ADC, computing SOC/SOH, and enforcing charge/discharge safety limits. Use Value: Wide 1.8–3.6 V operating range matches battery voltage swing; 4KB RAM buffers telemetry data during transient brownouts; FRAM retains fault logs across deep discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR2153TRSMT | 16KB program FRAM, 2KB RAM, identical peripheral set and package; lower memory density reduces cost for simpler firmware. | Targeted at cost-sensitive, lower-complexity sensor nodes where full 32KB FRAM is unnecessary. | Select when firmware size remains under 16KB and BOM cost optimization is prioritized over future scalability. |
| MSP430FR2355TRSMT | Same FRAM/RAM sizes but adds four Smart Analog Combo (SAC) modules - each configurable as PGA, OA, or 12-bit DAC - plus SAC-specific I/O routing. | Required for applications needing analog signal conditioning (e.g., strain gauge amplification, offset trimming) without external op-amps or DACs. | Choose only if SAC functionality is needed; not a drop-in replacement due to different pin assignments for SAC signals and incompatible peripheral register maps. |
Compared with MSP430FR2153TRSMT, the MSP430FR2155TRSMT offers double FRAM and RAM for complex algorithms and data buffering; compared with MSP430FR2355TRSMT, it omits SAC modules - reducing die size, cost, and design complexity where advanced analog front-end integration is unnecessary.
Availability
MSP430FR2155TRSMT is available at Aetrix Electronics and suitable for smoke detectors, sensor transmitters, and circuit breakers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MSP430FR2155TRSMT 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 solutions with emphasis on energy efficiency, reliability, and system-level integration.
The MSP430FR215x family is engineered for ultra-low-power sensing and measurement applications - prioritizing FRAM-based data integrity, extended temperature operation, and minimal active/standby current in battery- and energy-harvesting systems.
FAQ
What is the maximum operating frequency of the MSP430FR2155TRSMT?
The MSP430FR2155TRSMT supports a maximum CPU clock frequency of 24 MHz, achieved via its digitally controlled oscillator (DCO) with frequency-locked loop (FLL). This speed is fully operational across the entire –40°C to 105°C temperature range and 1.8–3.6 V supply voltage, enabling real-time signal processing in demanding industrial sensor applications.
Does the MSP430FR2155TRSMT include Smart Analog Combo (SAC) modules?
No, the MSP430FR2155TRSMT does not include Smart Analog Combo (SAC) modules. SAC functionality is exclusive to the MSP430FR235x series. The MSP430FR2155TRSMT provides two enhanced comparators (eCOMP) and a 12-bit ADC but lacks the configurable PGA, OA, and 12-bit DAC capabilities integrated into SAC blocks.
What package type and pin count does the MSP430FR2155TRSMT use?
The MSP430FR2155TRSMT uses a 40-pin VQFN package (RHA), measuring 6 mm × 6 mm with an exposed thermal pad. It provides 36 general-purpose I/O pins, all of which support interrupt and wakeup capability from low-power modes - making it suitable for compact, thermally constrained industrial sensor designs.
How much FRAM and RAM does the MSP430FR2155TRSMT integrate?
The MSP430FR2155TRSMT integrates 32KB of program FRAM (unified for code, constants, and data), 512 bytes of dedicated data FRAM, and 4KB of SRAM. This memory architecture enables fast, wear-free data logging, real-time variable storage, and robust firmware execution - critical for long-life industrial monitoring systems.
What is the typical current consumption of the MSP430FR2155TRSMT in LPM3.5 mode?
In LPM3.5 mode with the 32-kHz crystal active and SVS enabled, the MSP430FR2155TRSMT consumes 620 nA (typical) at 3 V and 25°C. This ultra-low standby current allows multi-year operation on standard CR2032 coin cells in applications such as wireless smoke alarms and environmental sensor transmitters.
MSP430FR2155TRSMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x12b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR2155TRSMT FAQ
1.How can I place an order for MSP430FR2155TRSMT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR2155TRSMT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430FR2155TRSMT reliable?
The price and inventory of MSP430FR2155TRSMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR2155TRSMT is usually 5 days.
3.What payment methods are accepted for MSP430FR2155TRSMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR2155TRSMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR2155TRSMT?
MSP430FR2155TRSMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR2155TRSMT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430FR2155TRSMT?
For technical support, including MSP430FR2155TRSMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR2155TRSMT requirements.
6.How does Aetrix verify that MSP430FR2155TRSMT is sourced from the original manufacturer or authorized distributors?
All MSP430FR2155TRSMT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430FR2155TRSMT meets industry standards.
7.What is the process for return or replacement of MSP430FR2155TRSMT?
All MSP430FR2155TRSMT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR2155TRSMT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430FR2155TRSMT part is unused and in its original packaging.
Return procedure for MSP430FR2155TRSMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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