Texas Instruments MSP430F5171IDAR

Overview

MSP430F5171IDAR 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 MSP430F5171IDAR datasheet, MSP430F5171IDAR pinout, MSP430F5171IDAR application, or MSP430F5171IDAR equivalent, key selection criteria include LPM4.5 shutdown current (0.25 µA), 5-µs wake-up time from LPM3, 40-pin QFN (RSB) package compatibility, and absence of integrated ADC-distinguishing it from the MSP430F5172IDAR variant.

Technical Context

The MSP430F5171IDAR belongs to the MSP430F51x1 family and shares core architecture with the F51x2 series-including CPUXV2 core, 3-channel DMA, unified clock system with FLL, VLO/REFO/XT1/XT2 support, and programmable LDO-but omits the 10-bit ADC10_A module present in F51x2 devices. Its peripheral set is fixed: two 16-bit Timer_D instances (each with three capture/compare registers and high-resolution mode), one Timer_A0 (three CC registers), and dual USCI modules.

Pin functionality is managed via the Port Mapping Controller, enabling flexible remapping of secondary functions (e.g., TD0.0, USCI signals, comparator inputs) across GPIO pins. All I/Os are 5-V tolerant with configurable drive strength (up to 20 mA), and the device supports JTAG and Spy-Bi-Wire debugging interfaces.

Key Specifications

Pinout & Package

Package: 40-pin WQFN (RSB), 5 mm × 5 mm body size, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5172IDAR, the MSP430F5171IDAR removes the ADC but retains identical timer, USCI, and power-performance characteristics-making it optimal for digitally focused control tasks. Against MSP430F5151IDAR, it doubles Flash capacity while preserving all peripherals, enabling more complex firmware without changing layout or firmware architecture.

Availability

MSP430F5171IDAR is available at Aetrix Electronics and suitable for smart sensor nodes, digital power monitors, and industrial remote terminals requiring stable component supply, long-term manufacturability, and TI's extended product lifecycle support.

Supply support for MSP430F5171IDAR 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 MSP430F51x1 product line delivers ultra-low-power mixed-signal microcontrollers optimized for battery-operated measurement, sensing, and control applications where minimal active and standby current are critical design constraints.

FAQ

Does the MSP430F5171IDAR include an integrated analog-to-digital converter (ADC)?

No, the MSP430F5171IDAR does not include an integrated ADC. Unlike the MSP430F5172IDAR, which features a 10-bit ADC10_A module with up to 9 external channels, the MSP430F5171IDAR omits this peripheral entirely. Designers must use external ADCs or rely on comparator-based threshold detection. This distinction is explicitly confirmed in the Device Comparison table and Signal Descriptions section of the SLAS619R datasheet.

What package type and dimensions does the MSP430F5171IDAR use?

The MSP430F5171IDAR is offered exclusively in the 40-pin WQFN (RSB) package, measuring 5 mm × 5 mm with an exposed thermal pad. This package is documented in Section 8 (Mechanical, Packaging, and Orderable Information) of the SLAS619R datasheet and matches the pinout shown in Figure 4-1. It is not available in TSSOP or DSBGA variants per TI's official ordering information.

How does the power consumption of the MSP430F5171IDAR compare across low-power modes?

The MSP430F5171IDAR achieves 1.1 µA in LPM3 (WDT active, 3 V), 0.9 µA in LPM4 (RAM retention, 3 V), and 0.25 µA in LPM4.5 (full shutdown, 3 V). These values are specified in the Features section and verified in Section 5.5 of SLAS619R. The ultra-low LPM4.5 current enables decade-scale battery operation in infrequently awakened sensor applications.

Can the MSP430F5171IDAR support both I²C and UART communication simultaneously?

Yes, the MSP430F5171IDAR supports concurrent I²C and UART communication using its two independent USCI modules: USCI_B0 handles I²C (or SPI), while USCI_A0 handles UART (or IrDA/SPI). Both modules operate autonomously with separate clock sources and interrupt vectors, enabling simultaneous sensor bus communication and host telemetry transmission without resource contention.

What is the maximum drive strength and voltage tolerance of the MSP430F5171IDAR I/O pins?

All GPIO pins on the MSP430F5171IDAR are 5-V tolerant and support up to 20 mA drive strength in full-drive mode. This specification is confirmed in the Features list ("Up to Twelve 5-V-Tolerant Digital Push/Pull I/Os With up to 20-mA Drive Strength") and detailed in Sections 5.11–5.14 of SLAS619R. Pins P2.0–P2.7 and P1.6–P1.7 support full drive strength across their entire operating voltage range.