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Texas Instruments MSP430F5171IRSBT
- Part No.:
- MSP430F5171IRSBT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
MSP430F5171IRSBT.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 40WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
MSP430F5171IRSBT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 32 KB Flash, 2 KB RAM, dual 16-bit Timer_D modules (TD0/TD1), USCI_A0 (UART/IrDA/SPI) and USCI_B0 (I²C/SPI), 5-V-tolerant I/Os, and a 16-channel comparator. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and digital power control.
For engineers reviewing the MSP430F5171IRSBT datasheet, MSP430F5171IRSBT pinout, MSP430F5171IRSBT application, or MSP430F5171IRSBT equivalent, key selection criteria include its 40-pin QFN (RSB) package, absence of integrated ADC (distinguishing it from MSP430F5172), ultra-low standby current (1.1 µA in LPM3), and reconfigurable port mapping for flexible peripheral routing.
Technical Context
The MSP430F5171IRSBT implements the CPUXV2 core with 16-bit registers and constant generators for optimized code efficiency. Its unified clock system integrates FLL-based frequency stabilization, VLO (10 kHz), REFO (32.768 kHz), and support for external crystals up to 25 MHz via XT1.
Power management includes a fully integrated LDO with programmable core voltage, supply supervision, brownout detection, and five low-power modes - enabling wake-up from LPM3 in under 5 µs. The 3-channel DMA engine offloads CPU during data transfers across peripherals including timers, USCI, and comparator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | CPUXV2 16-bit RISC with 40-ns instruction cycle time and hardware multiplier supporting 32-bit operations |
| Memory | 32 KB Flash (programmable in-system), 2 KB RAM - sufficient for real-time sensor fusion and control loops without external memory |
| Supply Voltage | 1.8 V to 3.6 V - enables direct operation from single Li-ion, two alkaline, or regulated 3.3 V rails |
| Low-Power Modes | LPM3 (1.1 µA @ 3 V), LPM4 (0.9 µA RAM retention), LPM4.5 (0.25 µA shutdown) - extends battery life in intermittent-sensing applications |
| Timers | Two independent 16-bit Timer_D modules (TD0/TD1), each with three capture/compare registers and high-resolution mode - supports precise PWM generation and time-critical event capture |
| Communication | USCI_A0 (UART with auto-baud detect, IrDA, SPI) + USCI_B0 (I²C, SPI) - enables robust host interfacing and multi-sensor bus communication |
| I/O Capability | Up to 29 GPIO pins, 12 of which are 5-V-tolerant with 20-mA drive strength - simplifies level-shifting and direct connection to industrial logic or LED drivers |
Pinout & Package
Package: 40-pin WQFN (RSB), 5 mm × 5 mm, 0.4 mm pitch, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0 / PM_UCA0CLK / PM_UCB0STE / CB0 | Multi-function I/O | Configurable as USCI_A0 SPI clock, USCI_B0 SPI slave transmit enable, or Comparator_B input 0 - enables shared signal routing without PCB redesign |
| RST/NMI/SBWTDIO | Reset & debug interface | Active-low reset with non-maskable interrupt capability and Spy-Bi-Wire debug I/O - supports in-system programming and field firmware updates |
| DVIO | 5-V-tolerant I/O supply | Independent 5-V rail for driving 5-V logic or LEDs directly - eliminates level translators in mixed-voltage systems |
| VCORE | Regulated core supply | Internally regulated output (1.8–2.2 V) from DVCC - decouples core voltage from supply noise and simplifies power sequencing |
| PJ.6 / TD1CLK / TD0.1 / CB15 | Timer & comparator I/O | Accepts external clock for TD1 while simultaneously serving as TD0 CCR1 output and Comparator_B input 15 - enables synchronized timer cascading and analog monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Port Mapping | Runtime remapping of peripheral functions to any compatible GPIO - eliminates fixed pinout constraints and accelerates prototype iteration |
| Ultra-Low-Power Timers | Timer_D modules operate in LPM3 with independent clock sources (e.g., REFO or VLO) - enables periodic wake-up and sensor sampling without CPU involvement |
| Hardware CRC16 Engine | Dedicated on-chip module for fast checksum calculation - reduces firmware overhead in secure boot and data integrity verification |
| Integrated LDO with Programmable Core Voltage | Adjustable VCORE (1.8–2.2 V) optimizes active-mode power vs. performance trade-off - extends battery runtime in variable-load applications |
| 3-Channel DMA | Automates data movement between peripherals (e.g., USCI → RAM, Timer → RAM) - frees CPU for computation while maintaining deterministic latency |
Applications
| Smart Sensor Node | Digital Power Monitor |
|---|---|
|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data at 10-second intervals. IC Role / Device Role / Timing Role: Central controller managing sensor polling, data aggregation, low-power UART transmission, and wake-up scheduling via Timer_D in LPM3. Use Value: 1.1 µA LPM3 current and sub-5 µs wake-up enable >5-year battery life using CR2032 cells. |
Use Scenario: Real-time monitoring of DC-DC converter output voltage, current, and thermal status in telecom power supplies. IC Role / Device Role / Timing Role: Analog front-end interface (via comparator), fault detection logic, and isolated UART reporting to host MCU. Use Value: 16-channel comparator with ultra-low-power mode detects overvoltage/overcurrent events with <1 µA quiescent current per channel. |
| LED Lighting Controller | Industrial Remote Control |
|
Use Scenario: Dimmable LED driver board requiring precise PWM dimming, thermal foldback, and IR remote decoding. IC Role / Device Role / Timing Role: PWM generator (Timer_D), IR demodulator (USCI_A0 IrDA mode), and thermal shutdown supervisor (Comparator_B). Use Value: 5-V-tolerant 20-mA I/Os drive LED gate drivers directly; hardware multiplier enables real-time gamma correction math. |
Use Scenario: Two-way RF remote for HVAC systems needing button scan, encryption, and low-latency response. IC Role / Device Role / Timing Role: Keypad scanner, AES co-processor interface (via USCI_B0 I²C), and low-jitter timing reference for RF sync pulses. Use Value: Dual USCI modules allow concurrent I²C security IC communication and UART RF module control without software arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F5172IRSBT | Includes 10-bit 200-ksps ADC with 8 external channels and internal temperature sensor; otherwise identical Flash/RAM/peripherals/package | Required when analog sensing (e.g., voltage, temperature, light) is performed on-chip instead of external ADC | Select MSP430F5172IRSBT only if integrated ADC functionality is needed - no PCB change required due to pin compatibility |
| MSP430F5151IRSBT | 16 KB Flash, 2 KB RAM, same peripherals and power specs - reduced program storage capacity | Suitable for simpler control firmware where code size <16 KB and no future feature expansion is planned | Choose MSP430F5151IRSBT to reduce BOM cost when application firmware fits within 16 KB and scalability is not required |
Compared with MSP430F5172IRSBT, the MSP430F5171IRSBT omits the ADC but retains full timer, USCI, and comparator capability - making it optimal for digital-control-dominant designs. Against MSP430F5151IRSBT, it offers double Flash for complex algorithms or bootloader+application separation.
Availability
MSP430F5171IRSBT is available at Aetrix Electronics and suitable for analog and digital sensor systems, LED lighting, and digital power supplies requiring stable component supply and long-term industrial availability.
Supply support for MSP430F5171IRSBT 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 specializing in analog, embedded processing, and connectivity technologies with decades of ultra-low-power MCU innovation.
The MSP430F51x1 product line delivers optimized 16-bit microcontrollers for portable measurement and battery-constrained applications - emphasizing rapid wake-up, minimal active/idle power, and flexible peripheral integration without integrated ADC.
FAQ
What is the primary functional difference between MSP430F5171IRSBT and MSP430F5172IRSBT?
The MSP430F5171IRSBT lacks the 10-bit 200-ksps ADC module present in the MSP430F5172IRSBT. All other specifications - including 32 KB Flash, 2 KB RAM, dual Timer_D, USCI_A0/B0, comparator, and 40-pin RSB package - are identical. This makes MSP430F5171IRSBT ideal for purely digital control tasks where external ADCs or comparator-based thresholding suffice.
Does MSP430F5171IRSBT support in-system programming without external voltage?
Yes. The MSP430F5171IRSBT supports serial onboard programming via Spy-Bi-Wire using only the RST/NMI/SBWTDIO and TEST/SBWTCK pins. No external programming voltage is required - the device derives programming power from DVCC, enabling field firmware updates through a two-wire interface.
What clock sources are available for Timer_D modules on MSP430F5171IRSBT?
The MSP430F5171IRSBT Timer_D modules (TD0 and TD1) accept multiple clock inputs: internal sources (VLO, REFO, SMCLK, MCLK, ACLK), external crystal (XT1), or dedicated pins (PJ.6/TD1CLK, P3.4/TD0CLK). This allows independent, low-jitter timing for PWM, capture, or synchronization without consuming main system clocks.
How many 5-V-tolerant I/O pins does MSP430F5171IRSBT have, and what is their drive strength?
The MSP430F5171IRSBT provides twelve 5-V-tolerant digital I/O pins with configurable 20-mA drive strength. These pins are distributed across Ports P1 (P1.0–P1.5), P3 (P3.2–P3.7), and PJ (PJ.0–PJ.6), enabling direct interface with 5-V logic, LED strings, or industrial sensors without external level shifters.
Is MSP430F5171IRSBT pin-compatible with other devices in the MSP430F51x1 family?
Yes. The MSP430F5171IRSBT shares identical pinout, package (40-pin RSB), and signal mapping with MSP430F5151IRSBT and MSP430F5131IRSBT. Differences are limited to Flash (32 KB vs. 16 KB vs. 8 KB) and RAM (2 KB vs. 2 KB vs. 1 KB), allowing scalable firmware reuse across the family on the same PCB layout.
MSP430F5171IRSBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-WFQFN Exposed Pad
- Series:
- MSP430F5xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 31
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F5171IRSBT FAQ
1.How can I place an order for MSP430F5171IRSBT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F5171IRSBT 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 MSP430F5171IRSBT reliable?
The price and inventory of MSP430F5171IRSBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F5171IRSBT is usually 5 days.
3.What payment methods are accepted for MSP430F5171IRSBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F5171IRSBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F5171IRSBT?
MSP430F5171IRSBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F5171IRSBT 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 MSP430F5171IRSBT?
For technical support, including MSP430F5171IRSBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F5171IRSBT requirements.
6.How does Aetrix verify that MSP430F5171IRSBT is sourced from the original manufacturer or authorized distributors?
All MSP430F5171IRSBT 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 MSP430F5171IRSBT meets industry standards.
7.What is the process for return or replacement of MSP430F5171IRSBT?
All MSP430F5171IRSBT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F5171IRSBT, 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 MSP430F5171IRSBT part is unused and in its original packaging.
Return procedure for MSP430F5171IRSBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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