Texas Instruments MSP430FR2033IG56

Overview

MSP430FR2033IG56 from Texas Instruments is a 16-bit RISC mixed-signal microcontroller with 15.5 KB FRAM (15360 + 512 B), 2 KB RAM, and integrated 10-bit ADC with 8 input channels. It operates from 1.8 V to 3.6 V, achieves 126 µA/MHz active current at 3 V, and supports ultra-low-power LPM3.5 mode at 0.77 µA with RTC and 32.768-kHz crystal - deployed in battery-powered smoke detectors and industrial sensor nodes.

For engineers reviewing the MSP430FR2033IG56 datasheet, MSP430FR2033IG56 pinout, MSP430FR2033IG56 application, or MSP430FR2033IG56 equivalent, key selection criteria include TSSOP-56 package I/O count (52 pins), capacitive touch support on all GPIOs, eUSCI_A0/eUSCI_B0 dual serial interface capability, and FRAM endurance (10¹⁵ write cycles) for frequent data logging without wear leveling.

Technical Context

This device implements a digitally controlled oscillator (DCO) with FLL, ±1% accuracy at room temperature using internal reference, and supports multiple clock domains: MCLK (up to 16 MHz), SMCLK (programmable prescaler 1/2/4/8), and ACLK (from XT1, REFO, or VLO). The clock system enables fast wake-up (<10 µs) from LPM3.5 while maintaining RTC operation.

The MCU integrates two Timer_A3 modules (each with three capture/compare registers), CRC16 engine, IR modulation logic, and programmable memory protection for FRAM. All 52 I/Os on the TSSOP-56 package are configurable as capacitive touch inputs, and P1/P2 pins provide interrupt-driven wake-up from low-power modes.

Key Specifications

Pinout & Package

TSSOP-56 (G56) package with 52 functional I/O pins, 2 power (DVCC/DVSS), and 2 debug pins (RST/NMI/SBWTDIO, TEST/SBWTCK). Pin count reduced vs. 64-pin LQFP variant; unused pins (e.g., P7.x, P8.x, TA1CLK, A8/A9) are not bonded out.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FR2032IG56 and MSP430FR2111IPW20, the MSP430FR2033IG56 provides the highest FRAM capacity and full RTC functionality in the TSSOP-56 form factor - making it optimal for applications requiring robust data logging and precise time-aware event handling without upgrading to larger packages.

Availability

MSP430FR2033IG56 is available at Aetrix Electronics and suitable for smoke detection, industrial sensor management, and capacitive touch HMI applications requiring stable component supply across multi-year production cycles.

Supply support for MSP430FR2033IG56 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 MSP430FR2033 belongs to TI's FRAM-based ultra-low-power MCU product line, engineered for energy-harvesting and battery-operated sensing applications where memory endurance, rapid wake-up, and sub-µA sleep currents are critical.

FAQ

What is the maximum operating frequency of the MSP430FR2033IG56?

The MSP430FR2033IG56 features a digitally controlled oscillator (DCO) with frequency-locked loop (FLL) that delivers up to 16 MHz system clock (MCLK). This maximum frequency is achievable across the full 1.8 V–3.6 V supply range and is specified with ±1% accuracy at room temperature using the internal reference. The MSP430FR2033IG56 maintains this performance while sustaining ultra-low active current of 126 µA/MHz at 3 V.

Does the MSP430FR2033IG56 support hardware I²C communication?

Yes, the MSP430FR2033IG56 supports hardware I²C via its eUSCI_B0 module. Pins P5.2 (UCB0SIMO/UCB0SDA) and P5.3 (UCB0SOMI/UCB0SCL) are dedicated to I²C data and clock functions, enabling standard-mode (100 kHz) and fast-mode (400 kHz) operation. This eliminates software bit-banging and ensures reliable, low-CPU-overhead communication with sensors, EEPROMs, or other I²C peripherals.

How many ADC input channels are available on the MSP430FR2033IG56?

The MSP430FR2033IG56 integrates a 10-bit SAR ADC with 8 external analog input channels (A0–A7), accessible on P1.0 through P1.7. While the full family supports up to 10 channels, the TSSOP-56 package (G56) omits A8 and A9 - confirmed in Table 3-1 and Figure 4-2. Each channel supports single-ended measurement with internal 1.5-V reference and sample-and-hold at 200 ksps.

Can the MSP430FR2033IG56 operate from a 1.8-V supply?

Yes, the MSP430FR2033IG56 is fully specified to operate from 1.8 V to 3.6 V. At 1.8 V, it supports CPU frequencies up to 8 MHz and maintains all core peripherals including FRAM, ADC, timers, and eUSCI modules. The supply voltage minimum is constrained by SVS thresholds, but the device guarantees functionality across this range - enabling direct use with single-cell lithium or alkaline batteries without regulation.

Is the MSP430FR2033IG56 pin-compatible with other devices in the MSP430FR203x family?

Yes, the MSP430FR2033IG56 shares identical pinout and electrical characteristics with the MSP430FR2032IG56 in the TSSOP-56 (G56) package. Both devices have 52 I/Os, same power/debug pin locations, and identical peripheral mappings - allowing firmware reuse and PCB design interchangeability where memory requirements permit. No layout changes are required when migrating between these two variants.