Texas Instruments MSP430F5437AIPNR

Overview

MSP430F5437AIPNR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 256 KB flash, 16 KB RAM, a 12-bit ADC with 14 external channels, three 16-bit timers (TA0/TA1/TB0), and dual USCI modules supporting UART/IrDA/SPI/I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems requiring sub-µA standby current and fast 3.5 µs wake-up.

For engineers reviewing the MSP430F5437AIPNR datasheet, MSP430F5437AIPNR pinout, MSP430F5437AIPNR application, or MSP430F5437AIPNR equivalent, key selection criteria include LQFP-80 package compatibility, RTC-integrated low-power timing, integrated LDO core regulation, and dual-USCI peripheral flexibility for sensor-to-cloud interface design.

Technical Context

The MSP430F5437AIPNR implements a CPUXV2 16-bit RISC core with constant generators and extended memory addressing, paired with a unified clock system including FLL, REFO, VLO, and support for 32-kHz and up to 32-MHz crystals. Its power management includes programmable LDO output voltage and brownout detection with SVM/SVS monitoring.

Peripherals are tightly synchronized via shared clock domains: MCLK drives CPU and DMA; SMCLK feeds timers and USCI; ACLK derives from XT1/REFO/VLO for RTC and low-frequency operation. The ADC12_A module uses internal or external reference and supports autoscan across 16 total channels (14 external + 2 internal) at up to 200 ksps.

Key Specifications

Pinout & Package

LQFP-80 package (12 mm × 12 mm), 67 GPIO pins with multiplexed analog/digital functions, including dedicated ADC input pins (A0–A15), crystal terminals (XIN/XOUT), and USCI signal groups (UCAx/UCAx, UCBx/UCBx).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430F5435AIPNR and MSP430F5418AIPNR, the MSP430F5437AIPNR provides maximum on-chip memory and full dual-USCI concurrency - making it the optimal choice for feature-rich, field-upgradable sensor nodes requiring long-term firmware extensibility and multi-protocol connectivity.

Availability

MSP430F5437AIPNR is available at Aetrix Electronics and suitable for analog sensor systems, digital thermostats, and hand-held meters requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430F5437AIPNR 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 MSP430F5437AIPNR belongs to TI's ultra-low-power MCU product line, engineered specifically for extended-battery-life portable measurement and sensing applications where energy efficiency, integrated analog peripherals, and robust low-power timing are critical.

FAQ

What is the maximum system clock frequency supported by the MSP430F5437AIPNR?

The MSP430F5437AIPNR supports a maximum system clock (MCLK) frequency of 25 MHz, achieved via its digitally controlled oscillator (DCO) with FLL stabilization. This frequency is confirmed in the device's electrical characteristics table and functional block diagram, enabling high-speed computation while maintaining ultra-low-power operation in active mode.

Does the MSP430F5437AIPNR include an integrated real-time clock (RTC) module?

Yes, the MSP430F5437AIPNR integrates the RTC_A module with calendar functionality, alarm capability, and dedicated 32-kHz crystal support (XIN/XOUT). This hardware RTC operates independently in LPM3 with only 1.7 µA current draw, eliminating the need for external timing ICs in time-sensitive sensor logging applications.

How many analog input channels does the 12-bit ADC on the MSP430F5437AIPNR support?

The MSP430F5437AIPNR's ADC12_A module supports 16 total input channels: 14 external analog inputs (A0–A15, with A10/A11 reserved) and 2 internal channels (temperature sensor and VCC/2). This configuration is explicitly documented in the device comparison table and functional block diagram for the MSP430F5437AIPN variant.

Is the MSP430F5437AIPNR pin-compatible with other devices in the MSP430F543x family?

Yes, the MSP430F5437AIPNR shares identical pinout and package (LQFP-80) with the MSP430F5435AIPNR and MSP430F5418AIPNR. Signal mapping, power/ground pin locations, and peripheral function assignments are fully aligned across these variants, enabling hardware reuse and simplified migration paths within the same package footprint.

What low-power modes are available on the MSP430F5437AIPNR, and what is the lowest current consumption?

The MSP430F5437AIPNR offers five low-power modes (LPM0–LPM4.5). The lowest active-retention mode is LPM4.5 (shutdown), drawing 0.1 µA at 3.0 V with full RAM retention and fast wakeup. LPM3 (RTC active) draws 1.7 µA at 2.2 V - both values are measured and specified in the "Low-Power Mode Supply Currents" section of the official datasheet.