Texas Instruments MSP430F5172IRSBT

Overview

MSP430F5172IRSBT from Texas Instruments is a 16-bit ultra-low-power mixed-signal 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), 10-bit 200-ksps ADC with 8 external + 2 internal channels, and 16-channel comparator. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems requiring sub-µA standby current.

For engineers reviewing the MSP430F5172IRSBT datasheet, MSP430F5172IRSBT pinout, MSP430F5172IRSBT application, or MSP430F5172IRSBT equivalent, key selection criteria include LPM3 standby current (1.1 µA @ 3 V), 5-V-tolerant I/O count (up to 31 pins), integrated LDO core regulation, and QFN-40 (RSB) package compatibility with TI's MSP430F51x2 family.

Technical Context

The MSP430F5172IRSBT implements a 16-bit RISC CPUXV2 core with constant generators and 40-ns instruction cycle time. Its unified clock system integrates FLL-based frequency stabilization, VLO (10 kHz), REFO (32.768 kHz), and support for both low-frequency (32 kHz) and high-frequency (up to 25 MHz) crystals via XT1.

Power management includes programmable LDO-regulated core voltage (VCORE), supply voltage supervision (SVM/SVS), brownout reset, and five low-power modes - including LPM4.5 (0.25 µA shutdown). Peripheral control is handled by a port mapping controller enabling dynamic reassignment of secondary functions across I/O pins.

Key Specifications

Pinout & Package

The MSP430F5172IRSBT is housed in a 40-pin WQFN package (5 mm × 5 mm, RSB suffix), with exposed thermal pad and 0.4-mm pitch. Pin assignments follow TI's standardized RSB footprint for drop-in compatibility within the MSP430F51x2 family.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5152IRSBT and MSP430F5132IRSBT, the MSP430F5172IRSBT delivers 2× Flash and full ADC reference integration - enabling richer firmware features and higher-accuracy analog measurement without external components, while maintaining identical power profile and QFN-40 layout.

Availability

MSP430F5172IRSBT is available at Aetrix Electronics and suitable for analog sensor systems, digital power supplies, and motor controls requiring stable component supply and long-term industrial lifecycle support.

Supply support for MSP430F5172IRSBT 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 and reliability.

The MSP430F5172IRSBT belongs to TI's MSP430F51x2 ultra-low-power microcontroller product line, designed specifically for extended-battery-life portable measurement and sensing applications demanding sub-µA standby and integrated analog front-end capability.

FAQ

What is the maximum operating frequency of the MSP430F5172IRSBT?

The MSP430F5172IRSBT supports a maximum system clock (MCLK) frequency of 25 MHz when using an external high-frequency crystal on XT1. Its digitally controlled oscillator (DCO) can be calibrated to achieve stable operation across the full 1.8–3.6 V supply range, and the FLL ensures frequency accuracy without requiring external trimming components. This allows the MSP430F5172IRSBT to execute instructions at up to 25 million per second while maintaining ultra-low power consumption.

Does the MSP430F5172IRSBT support hardware debugging during operation?

Yes, the MSP430F5172IRSBT supports real-time hardware debugging via its integrated Spy-Bi-Wire (SBW) interface using the RST/NMI/SBWTDIO and TEST/SBWTCK pins. This two-wire interface enables full JTAG-like functionality - including breakpoints, register inspection, and flash programming - without occupying additional GPIOs. The MSP430F5172IRSBT maintains full debug visibility even in low-power modes LPM0–LPM3, allowing engineers to validate power-aware firmware behavior without compromising measurement integrity.

How many ADC input channels does the MSP430F5172IRSBT support, and are they all accessible in the RSB package?

The MSP430F5172IRSBT supports 8 external analog input channels (A0–A7) plus 2 internal channels (temperature sensor and VCC/2), totaling 10 ADC inputs. All 8 external channels are fully accessible in the 40-pin RSB package - mapped to P1.0–P1.5, P3.5–P3.7, and PJ.2 - as confirmed in the device's signal descriptions and pin diagrams. The internal channels require no pin allocation and are always available for system health monitoring or supply tracking within the MSP430F5172IRSBT.

Can the MSP430F5172IRSBT generate precise PWM signals for motor control?

Yes, the MSP430F5172IRSBT can generate precise, high-resolution PWM signals using its two independent Timer_D modules (TD0 and TD1), each with three capture/compare registers and dedicated high-resolution mode. These timers support 16-bit period and duty-cycle control, phase-aligned outputs, and fault protection inputs (TEC0/TEC1) - enabling robust brushless DC motor commutation or stepper motor microstepping. The MSP430F5172IRSBT's 5-V-tolerant I/Os also allow direct connection to gate drivers without level-shifting circuitry.

Is the MSP430F5172IRSBT pin-compatible with other devices in the MSP430F51x2 family?

Yes, the MSP430F5172IRSBT is fully pin-compatible with other 40-pin QFN (RSB) variants in the MSP430F51x2 family, including MSP430F5152IRSBT and MSP430F5132IRSBT. They share identical pin counts, mechanical footprint, power domain assignments, and primary peripheral mappings (USCI, Timer_D, ADC, comparator). Firmware and PCB layouts designed for one RSB-packaged MSP430F51x2 device can be reused across the family - only Flash/RAM capacity and select ADC reference features differ between models.