Texas Instruments MSP430FR2433IYQWR

Overview

MSP430FR2433IYQWR from Texas Instruments is a 16-bit ultra-low-power FRAM microcontroller designed for battery-constrained sensing applications. It integrates 15.5 KB nonvolatile FRAM, 4 KB RAM, 10-bit ADC with 8 channels, dual eUSCI_A (UART/SPI/IrDA) and one eUSCI_B (SPI/I²C), and operates from 1.8 V to 3.6 V at up to 16 MHz. It targets compact industrial sensors and energy-harvesting nodes requiring RTC operation in LPM3.5 at 730 nA.

For engineers reviewing the MSP430FR2433IYQWR datasheet, MSP430FR2433IYQWR pinout, MSP430FR2433IYQWR application, or MSP430FR2433IYQWR equivalent, key selection criteria include its DSBGA-24 (2.29 mm × 2.34 mm) footprint, 17 GPIOs, 730 nA RTC current in LPM3.5, FRAM endurance (10¹⁵ writes), and support for SBW debug interface - all critical for space- and power-sensitive embedded designs.

Technical Context

The MSP430FR2433IYQWR implements a 16-bit RISC CPU with integrated DCO+FLL clock system delivering ±1% accuracy at room temperature using on-chip reference. Its low-power architecture supports six operating modes, including LPM3.5 where only the RTC and 32-byte backup memory remain active while consuming just 730 nA.

Peripherals are tightly coupled to power domains: the 10-bit ADC runs at 200 ksps with internal 1.5-V reference and sample-and-hold; Timer_A3 provides three capture/compare registers (CCR0–CCR2), though only CCR1/CCR2 are externally accessible; and eUSCI modules support asynchronous UART, synchronous SPI, and I²C with programmable baud rates and automatic clock sourcing.

Key Specifications

Pinout & Package

Package: DSBGA-24 (YQW), 2.29 mm × 2.34 mm, ball-pitch 0.4 mm, bottom-side solder balls. Compatible with standard reflow profiles and suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2433IRGE, the MSP430FR2433IYQWR saves >70% board area with identical core functionality; versus MSP430FR2355TRHBR, it trades analog richness for minimal size and lower system BOM cost in basic sensing roles.

Availability

MSP430FR2433IYQWR is available at Aetrix Electronics and suitable for industrial sensor nodes, energy-harvesting endpoints, and electronic door locks requiring stable component supply across long-lifecycle deployments.

Supply support for MSP430FR2433IYQWR 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 over 50 years of innovation in low-power design.

The MSP430FR2433IYQWR belongs to TI's Value Line FRAM MCU family - engineered specifically for cost-sensitive, battery-powered sensing applications demanding ultra-low standby current and robust nonvolatile memory without flash limitations.

FAQ

What is the maximum operating frequency of the MSP430FR2433IYQWR?

The MSP430FR2433IYQWR supports a maximum CPU clock frequency of 16 MHz, achieved via its on-chip digitally controlled oscillator (DCO) with frequency-locked loop (FLL). This frequency is maintained with ±1% accuracy at room temperature using the internal reference, eliminating the need for an external high-frequency crystal in most applications. The MSP430FR2433IYQWR sustains this speed across its full 1.8 V to 3.6 V supply range.

Does the MSP430FR2433IYQWR support real-time clock (RTC) functionality in ultra-low-power mode?

Yes, the MSP430FR2433IYQWR supports full RTC operation in LPM3.5 mode with typical current consumption of 730 nA when using a 32.768-kHz external crystal. In this mode, only the RTC counter and 32-byte backup memory remain powered - all other peripherals, CPU, and RAM are disabled. The MSP430FR2433IYQWR retains timekeeping accuracy and wake-up capability without compromising battery longevity.

How many GPIO pins does the MSP430FR2433IYQWR provide, and which support wake-up from low-power modes?

The MSP430FR2433IYQWR provides 17 general-purpose I/O pins in its DSBGA-24 package. Of these, all 16 pins on Ports P1 and P2 (P1.0–P1.7 and P2.0–P2.7) are individually configurable as interrupt sources and can wake the device from all low-power modes, including LPM3.5 and LPM4.5. Port P3 offers three additional GPIOs (P3.0–P3.2) without interrupt capability.

What debug interface does the MSP430FR2433IYQWR use, and what pins are required?

The MSP430FR2433IYQWR uses the two-wire Spy-Bi-Wire (SBW) interface for programming and debugging. Only two pins are required: SBWTDIO (Ball E1) and SBWTCK (Ball D2). These share functions with RST/NMI and TEST, respectively. No external debug probe is needed beyond TI's MSP-FET or compatible tools - the MSP430FR2433IYQWR integrates full SBW support without requiring JTAG header pins.

Is the FRAM memory in the MSP430FR2433IYQWR truly nonvolatile, and what is its endurance rating?

Yes, the FRAM in the MSP430FR2433IYQWR is fully nonvolatile with instant write capability and no erase cycles. It guarantees 10¹⁵ write/erase endurance - orders of magnitude higher than flash - and retains data for ≥10 years at 85°C. This makes the MSP430FR2433IYQWR ideal for frequent data logging, firmware updates, and parameter storage where flash wear-out or write latency would otherwise limit reliability.