Texas Instruments MSP430F5437IPNR

Overview

MSP430F5437IPNR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 256 KB Flash, 16 KB RAM, 67 I/O pins, 12-bit ADC (14 external + 2 internal channels), and three 16-bit timers (Timer_A ×2, Timer_B ×1). It operates from 2.2 V to 3.6 V and supports real-time clock (RTC), hardware multiplier, DMA, and dual USCI modules (UART/IrDA/SPI/I²C) - deployed in battery-powered sensor systems and digital thermostats.

For engineers reviewing the MSP430F5437IPNR datasheet, MSP430F5437IPNR pinout, MSP430F5437IPNR application, or MSP430F5437IPNR equivalent, key selection criteria include LPM3 standby current (2.6 µA), 80-pin LQFP package compatibility, 18-MHz max system clock, RTC alarm capability, and dual USCI_A/USCI_B interface configuration for mixed-protocol communication.

Technical Context

The MSP430F5437IPNR implements a unified clock system (UCS) with FLL stabilization, VLO/REFO internal oscillators, and support for 32-kHz crystals and up to 32-MHz high-frequency crystals. Its CPUXV2 core executes instructions in single-cycle mode with constant generators for optimized code density.

Power management includes an integrated LDO with programmable core voltage, supply supervision (SVS/SVM), brownout reset, and five low-power modes (LPM0–LPM4). Wake-up from LPM3 occurs in under 5 µs, enabled by RTC, watchdog, or external interrupt sources.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm), RoHS-compliant, surface-mount. Pin mapping validated per TI SLAS612F Figure 4-2 and Table 4-1 for MSP430F5437IPN variant (IPNR is PN-package variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F5435IPN and MSP430F5418IPN, the MSP430F5437IPNR provides maximum Flash headroom (256 KB) while retaining identical low-power performance, I/O count, and peripheral feature set - making it optimal for field-upgradable firmware or complex sensor fusion algorithms.

Availability

MSP430F5437IPNR is available at Aetrix Electronics and suitable for remote sensor nodes, digital thermostats, and hand-held meters requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for MSP430F5437IPNR 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 for industrial, automotive, and consumer markets.

The MSP430F5437IPNR belongs to the MSP430F5xx ultra-low-power MCU family, designed specifically for extended-battery-life portable measurement and sensing applications with integrated analog peripherals and aggressive power-state optimization.

FAQ

What is the maximum operating frequency of the MSP430F5437IPNR?

The MSP430F5437IPNR supports a maximum system clock frequency of 18 MHz, achieved via its digitally controlled oscillator (DCO) stabilized by the FLL loop in the Unified Clock System. This frequency is confirmed in Section 1.1 Features and Table 5-20 (DCO Frequency) of the SLAS612F datasheet. The MSP430F5437IPNR maintains full peripheral functionality and timing compliance at this rate, including ADC sampling and USCI baud generation.

Does the MSP430F5437IPNR support crystal oscillators?

Yes, the MSP430F5437IPNR supports both low-frequency (32 kHz) and high-frequency (up to 32 MHz) crystal oscillators via dedicated XT1 and XT2 pins. XT1 is accessible on P7.0/XIN and P7.1/XOUT; XT2 uses P5.2/XT2IN and P5.3/XT2OUT. These are validated in Section 5.15–5.17 of SLAS612F and functional block diagrams for the PN package. Crystal support enables precise RTC operation and stable high-speed system clocks.

How many USCI modules does the MSP430F5437IPNR include?

The MSP430F5437IPNR includes two USCI_A modules (UCA0, UCA1) and two USCI_B modules (UCB0, UCB1), as specified in Table 3-1 (Device Comparison) and Section 1.1 Features of SLAS612F. Unlike the 100-pin PZ variants (e.g., MSP430F5438), the MSP430F5437IPNR does not implement USCI2 or USCI3. Each USCI_A supports UART/IrDA/SPI; each USCI_B supports I²C/SPI - enabling concurrent protocol use.

What is the ADC resolution and channel count for the MSP430F5437IPNR?

The MSP430F5437IPNR integrates a 12-bit successive-approximation ADC (ADC12_A) with 14 external analog input channels and 2 internal channels (temperature sensor and VREF/2), totaling 16 selectable inputs. This is explicitly stated in Table 3-1 and Section 1.1 Features. The ADC achieves 200 ksps throughput with autoscan mode and internal reference - confirmed in Sections 5.36–5.41 of SLAS612F.

Is the MSP430F5437IPNR pin-compatible with other devices in the F543x family?

Yes, the MSP430F5437IPNR is pin-compatible with MSP430F5435IPN and MSP430F5418IPN in the 80-pin LQFP (PN) package, sharing identical pin numbering, electrical characteristics, and signal assignments per Table 4-1 and Figure 4-2 of SLAS612F. This allows direct PCB reuse across these variants when Flash/RAM requirements permit.