Texas Instruments MSP430F5132IRSBR

Overview

MSP430F5132IRSBR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 8 KB Flash, 1 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 and digital power supplies.

For engineers reviewing the MSP430F5132IRSBR datasheet, MSP430F5132IRSBR pinout, MSP430F5132IRSBR application, or MSP430F5132IRSBR equivalent, key selection factors include its 40-pin QFN (RSB) package, 5-V-tolerant I/Os with 20-mA drive strength, sub-5-µs wake-up from LPM3, and integrated LDO with programmable core voltage - critical for energy-constrained embedded designs.

Technical Context

The MSP430F5132IRSBR implements a unified clock system with FLL stabilization, VLO (10 kHz), REFO (32.768 kHz), and support for 32-kHz crystals (XT1) and up to 25-MHz high-frequency crystals. Its CPUXV2 core executes instructions in 40 ns, supported by constant generators and a 32-bit hardware multiplier for efficient signal processing.

Peripherals are managed via a port mapping controller enabling dynamic reassignment of secondary functions (e.g., USCI, Timer, ADC) across I/O pins. Power management includes five low-power modes (LPM0–LPM4.5), with LPM4.5 consuming only 0.25 µA at 3 V while retaining RAM, making it suitable for long-duration sleep in metering and remote sensing.

Key Specifications

Pinout & Package

Package: 40-pin WQFN (RSB), 5 mm × 5 mm, 0.4-mm pitch, thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5132IRSBR, the MSP430F5152IRSBR offers double the Flash and RAM for feature-rich firmware, while the MSP430F5131IRSBT sacrifices ADC and uses a larger TSSOP package - making the MSP430F5132IRSBR the optimal balance of analog capability, compact QFN footprint, and memory for sensor-integrated edge devices.

Availability

MSP430F5132IRSBR is available at Aetrix Electronics and suitable for smart energy metering, digital power supply control, and wireless sensor node designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F5132IRSBR 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 expertise in ultra-low-power microcontrollers.

The MSP430F51x2 product line was designed specifically for energy-conscious applications demanding extended battery life, robust analog integration, and flexible communication - targeting metering, sensing, and portable industrial equipment.

FAQ

What is the maximum operating frequency of the MSP430F5132IRSBR?

The MSP430F5132IRSBR supports a maximum MCLK frequency of 25 MHz using an external crystal (XT1 high-frequency mode) or DCO-based FLL output. Internal clock sources include VLO (10 kHz), REFO (32.768 kHz), and programmable DCO frequencies - all configurable via the unified clock system registers. The MSP430F5132IRSBR achieves full performance within its 1.8–3.6 V supply range.

Does the MSP430F5132IRSBR include an integrated ADC, and what are its key specifications?

Yes, the MSP430F5132IRSBR integrates a 10-bit ADC (ADC10_A) with 200-ksps sampling rate, internal reference, sample-and-hold, autoscan mode, and support for up to 8 external analog inputs plus 2 internal channels (including temperature sensor). It is fully functional in the 40-pin QFN package and documented in Section 5.38–5.42 of the SLAS619R datasheet. The MSP430F5132IRSBR ADC meets these specs without external components.

Can the MSP430F5132IRSBR operate from a single lithium coin cell?

Yes - the MSP430F5132IRSBR operates from 1.8 V to 3.6 V, matching the discharge curve of common CR2032 (2.0–3.0 V) and BR2032 (2.4–3.0 V) coin cells. Its LPM4.5 current of 0.25 µA at 3 V enables multi-year operation in always-on sensor applications. The MSP430F5132IRSBR's integrated LDO maintains stable VCORE even as battery voltage declines, ensuring reliable operation down to 1.8 V.

What debug interface does the MSP430F5132IRSBR support, and is external hardware required?

The MSP430F5132IRSBR supports Spy-Bi-Wire (SBW), a 2-wire JTAG variant, using dedicated pins RST/NMI/SBWTDIO (Pin 33) and TEST/SBWTCK (Pin 32). No external voltage translator or dedicated debugger is mandatory - TI's MSP-FET or compatible SBW programmers connect directly. The MSP430F5132IRSBR also supports bootloader (BSL) via UART for field firmware updates without debug hardware.

How many I²C interfaces does the MSP430F5132IRSBR provide, and which USCI module implements it?

The MSP430F5132IRSBR provides one hardware I²C interface implemented exclusively by USCI_B0, as confirmed in Section 1.1 and Table 3-1 of the SLAS619R datasheet. USCI_A0 supports UART, IrDA, and SPI only. I²C functionality on USCI_B0 includes standard-mode (100 kbps) and fast-mode (400 kbps) operation, slave and master modes, and automatic clock stretching - all natively supported by the MSP430F5132IRSBR peripheral.