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Texas Instruments MSP430FR2155TRHAR
- Part No.:
- MSP430FR2155TRHAR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MSP430FR2155TRHAR.pdf
- Description:
- IC MCU 16BIT 32KB FRAM 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
MSP430FR2155TRHAR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 32KB FRAM, 4KB RAM, and integrated analog peripherals including a 12-channel 12-bit SAR ADC, two enhanced comparators, and programmable gain op-amp support - designed for battery-powered industrial sensing and smoke detection systems operating from –40°C to 105°C.
For engineers reviewing the MSP430FR2155TRHAR datasheet, MSP430FR2155TRHAR pinout, MSP430FR2155TRHAR application, or MSP430FR2155TRHAR equivalent, key selection criteria include its 40-pin VQFN (RHA) package, 1.8–3.6 V supply range, LPM3.5 current of 620 nA, FRAM endurance of 1015 write cycles, and dual eUSCI_A/eUSCI_B modules supporting UART/I²C/SPI.
Technical Context
The MSP430FR2155TRHAR implements a 24-MHz digitally controlled oscillator (DCO) with FLL, ±1% accuracy at room temperature, and supports multiple clock sources including internal REFO/VLO/MODOSC and external 32-kHz LFXT and up to 24-MHz HFXT crystals. Its power management module enables rapid wake-up (<10 µs) from LPM3.5 and includes SVS with configurable thresholds.
It integrates three Timer_B3 modules (each with 3 capture/compare registers) and one Timer_B7 (7 registers), CRC16 hardware, 32-bit MPY32 multiplier, and interrupt compare controller (ICC) for nested hardware interrupts - all optimized for deterministic real-time sensor data acquisition and low-duty-cycle wireless transmission control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generator; enables high code efficiency for compact firmware in resource-constrained embedded sensors. |
| Memory | 32KB program/data FRAM + 512B data FRAM + 4KB RAM; unified nonvolatile memory eliminates flash erase delays and supports true data logging during brown-out. |
| ADC | 12-bit SAR ADC with 12 input channels, 200 ksps sample rate, and internal 1.5/2.0/2.5 V references; suitable for direct sensor signal digitization without external reference ICs. |
| Low-Power Modes | LPM3.5 draws 620 nA (with 32.768-kHz crystal and SVS enabled); enables multi-year battery life in intermittent wake-up applications like smoke detectors. |
| Communication | Two eUSCI_A (UART/IrDA/SPI) and two eUSCI_B (SPI/I²C) modules; allows concurrent wired sensor interface (I²C) and host communication (UART) without software multiplexing. |
| Operating Temp | –40°C to 105°C; qualified for harsh industrial environments including circuit breakers and optical modules where ambient heat exceeds standard commercial grade limits. |
| Supply Voltage | 1.8 V to 3.6 V; wide range accommodates aging batteries and unregulated power rails while maintaining full peripheral functionality. |
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 |
|---|---|---|
| DVCC / DVSS | Main digital/analog power pair | Single-supply domain powers all digital logic and analog blocks; requires 4.7–10 µF bulk + 0.1 µF ceramic decoupling per TI layout guidelines. |
| RST/NMI/SBWTDIO TEST/SBWTCK |
Reset, NMI, and Spy-Bi-Wire debug interface | Enables in-system programming and debugging via 2-wire SBW; no JTAG header needed, reducing BOM and PCB footprint. |
| P1.0–P1.7, P2.0–P2.7, P3.0–P3.7, P4.0–P4.7, P5.0–P5.4, P6.0–P6.6 | Configurable GPIO with peripheral multiplexing | 36 total I/Os (not 44 - reduced vs. 48-pin variant); each supports interrupt-on-change and wake-up from all LPMs including LPM4.5. |
| XIN / XOUT | External crystal oscillator terminals | Supports 32.768-kHz LFXT for RTC and up to 24-MHz HFXT; critical for time-critical applications like toll tag timing or synchronized sensor sampling. |
| UCB0SCL/UCB0SDA UCB1SCL/UCB1SDA |
I²C bus interfaces | Dual independent I²C masters/slaves enable connection to multiple sensors (e.g., temperature + humidity) without bus arbitration overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Ferroelectric RAM (FRAM) | 32KB unified program/data memory with 1015 write endurance and instant write capability - eliminates wear leveling and enables reliable event-triggered data logging. |
| Smart Analog Combo (SAC) | Not present on MSP430FR2155TRHAR (SAC modules are exclusive to FR235x family); this device retains two enhanced comparators with 6-bit DAC reference and programmable hysteresis. |
| ROM Library | 20KB on-chip ROM containing driver libraries (GPIO, UART, I²C) and FFT routines - reduces firmware size and accelerates development of signal-processing algorithms. |
| Real-Time Clock (RTC) | 16-bit counter-only RTC with LPM3.5 operation; maintains timekeeping during ultra-low-power sleep while consuming only 620 nA, enabling calendar-based wake-up in battery systems. |
| Manchester Codec (MFM) | Hardware MFM encoder/decoder supports ISO/IEC 14443-A compliant contactless communication - essential for toll tag and secure access applications using RF coupling. |
Applications
| Smoke Detection System | Battery-Powered Sensor Transmitter |
|---|---|
|
Use Scenario: Standalone optical smoke detector with self-test, alarm output, and wireless reporting. IC Role / Device Role / Timing Role: Main system controller handling photodiode signal conditioning via ADC, comparator-based threshold detection, and periodic RF transmission timing via RTC and MFM. Use Value: LPM3.5 current of 620 nA extends lithium primary battery life beyond 10 years; FRAM ensures tamper-proof event logging of self-tests and alarms. |
Use Scenario: Remote environmental sensor node measuring temperature, humidity, and CO₂, transmitting data every 5 minutes over sub-GHz RF. IC Role / Device Role / Timing Role: Central MCU managing sensor I²C reads, ADC conversions, data preprocessing, and precise sleep/wake scheduling using RTC and Timer_B7. Use Value: Dual eUSCI_B modules allow simultaneous I²C sensor interface and SPI RF transceiver control; 1.8 V minimum supply supports operation down to end-of-battery voltage. |
| Industrial Circuit Breaker Monitor | Optical Module Control |
|
Use Scenario: DIN-rail mounted breaker with current sensing, thermal monitoring, and RS-485 communication to SCADA. IC Role / Device Role / Timing Role: Real-time fault detection engine using ADC oversampling and comparator fast-response mode (100 ns), with UART-to-RS485 bridge via eUSCI_A. Use Value: Extended –40°C to 105°C rating ensures reliability inside hot electrical cabinets; 24-MHz DCO enables sub-microsecond response to overcurrent events. |
Use Scenario: SFP+ transceiver module requiring precise bias control, temperature compensation, and digital diagnostics (DDM). IC Role / Device Role / Timing Role: Embedded monitor managing TEC driver feedback, laser bias DAC setting, and EEPROM read/write via I²C for SFF-8472 compliance. Use Value: Integrated 6-bit DAC provides stable reference for laser bias control; FRAM stores calibrated coefficients with infinite write endurance across thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR2153TRHAR | 16KB FRAM, 2KB RAM, same package/peripherals; lacks 16KB additional FRAM and 2KB extra RAM. | Suitable for simpler sensor nodes with smaller firmware and less data buffering; not recommended when OTA updates or extended logging require >16KB nonvolatile storage. | Select MSP430FR2153TRHAR only if firmware size and runtime data requirements fit within 16KB FRAM and 2KB RAM constraints. |
| MSP430FR2355TRHAR | Same FRAM/RAM, adds four Smart Analog Combo (SAC) modules - configurable OA, PGA, and 12-bit DAC - absent in MSP430FR2155TRHAR. | Required for applications needing analog front-end flexibility (e.g., programmable gain for varying sensor outputs); unnecessary if only basic ADC/comparators are used. | Choose MSP430FR2355TRHAR only when SAC functionality is explicitly needed; otherwise MSP430FR2155TRHAR offers identical core MCU performance at lower cost. |
Compared with MSP430FR2153TRHAR, the MSP430FR2155TRHAR provides double FRAM and RAM for larger firmware and buffered telemetry, while MSP430FR2355TRHAR adds analog configurability at the expense of higher unit cost and no benefit if SAC is unused.
Availability
MSP430FR2155TRHAR is available at Aetrix Electronics and suitable for smoke detection systems, battery-powered sensor transmitters, industrial circuit breaker monitors, and optical module control requiring stable component supply across extended temperature and long-life deployments.
Supply support for MSP430FR2155TRHAR 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 deep expertise in low-power design and industrial-grade reliability.
The MSP430FR215x product line targets ultra-low-power sensing and measurement applications - emphasizing FRAM-based data integrity, extended temperature operation, and minimal active/sleep current for battery longevity in safety-critical endpoints.
FAQ
What is the maximum operating frequency of the MSP430FR2155TRHAR?
The MSP430FR2155TRHAR features a 24-MHz digitally controlled oscillator (DCO) with frequency-locked loop (FLL), enabling a maximum CPU clock frequency of 24 MHz. This allows high-speed signal processing in applications such as real-time sensor fusion or Manchester-encoded RF transmission, while maintaining ultra-low-power operation in active mode at 142 µA/MHz.
Does the MSP430FR2155TRHAR support hardware encryption or secure boot?
No, the MSP430FR2155TRHAR does not include hardware cryptographic accelerators or secure boot functionality. It relies on software-based security measures and external secure elements if required. Its design prioritizes ultra-low power and analog integration rather than cryptographic capabilities - making it suitable for cost-sensitive, non-security-critical sensing endpoints.
How many I/O pins does the MSP430FR2155TRHAR have in its 40-pin VQFN package?
The MSP430FR2155TRHAR in the 40-pin VQFN (RHA) package provides 36 general-purpose I/O pins, confirmed by the device comparison table and pin multiplexing documentation. This is fewer than the 44 I/Os available in the 48-pin LQFP variant, due to pin count reduction in the smaller package - all remaining I/Os retain interrupt and LPM wake-up capability.
Can the MSP430FR2155TRHAR drive an external crystal up to 24 MHz?
Yes, the MSP430FR2155TRHAR supports an external high-frequency crystal oscillator (HFXT) up to 24 MHz, as specified in the clock system section. This enables precise timing for high-speed serial communication (e.g., UART at 1 Mbps) and accurate ADC sampling clocks, with ±1% DCO accuracy maintained via FLL lock to the crystal reference.
Is there a built-in temperature sensor in the MSP430FR2155TRHAR?
No, the MSP430FR2155TRHAR does not integrate a factory-calibrated die temperature sensor. Temperature monitoring must be implemented externally using an I²C or ADC-connected sensor. The device's extended –40°C to 105°C operating range is validated for ambient operation, but on-chip thermal sensing is not provided.
MSP430FR2155TRHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-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:
- 36
- 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 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR2155TRHAR FAQ
1.How can I place an order for MSP430FR2155TRHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR2155TRHAR 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 MSP430FR2155TRHAR reliable?
The price and inventory of MSP430FR2155TRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR2155TRHAR is usually 5 days.
3.What payment methods are accepted for MSP430FR2155TRHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR2155TRHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR2155TRHAR?
MSP430FR2155TRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR2155TRHAR 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 MSP430FR2155TRHAR?
For technical support, including MSP430FR2155TRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR2155TRHAR requirements.
6.How does Aetrix verify that MSP430FR2155TRHAR is sourced from the original manufacturer or authorized distributors?
All MSP430FR2155TRHAR 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 MSP430FR2155TRHAR meets industry standards.
7.What is the process for return or replacement of MSP430FR2155TRHAR?
All MSP430FR2155TRHAR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR2155TRHAR, 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 MSP430FR2155TRHAR part is unused and in its original packaging.
Return procedure for MSP430FR2155TRHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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