Texas Instruments MSP430G2233IRHB32T

Overview

MSP430G2233IRHB32T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 2 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with 8 channels and internal reference, two 16-bit Timer_A modules with three capture/compare registers each, USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and up to 24 capacitive-touch-enabled I/O pins in a 32-pin QFN package. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and touch interfaces.

For engineers reviewing the MSP430G2233IRHB32T datasheet, MSP430G2233IRHB32T pinout, MSP430G2233IRHB32T application, or MSP430G2233IRHB32T equivalent, key selection criteria include its 2 KB flash size, 10-bit ADC with autoscan, Spy-Bi-Wire debug interface, 32-pin RHB QFN thermal pad layout, and support for LIN-compliant UART auto-baud detection in low-power embedded sensing systems.

Technical Context

The MSP430G2233IRHB32T implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from standby mode. Its clock system integrates internal VLO, calibrated DCO (up to 16 MHz), 32-kHz crystal support (XT1), and external digital clock input - all configurable via BCSCTL registers.

Peripherals are tightly coupled to power modes: the 10-bit ADC supports sample-and-hold and DMA-triggered autoscan; USCI modules operate independently in LPM3; Timer_A units provide PWM, capture, and interval timing with interrupt-capable compare registers; and all 24 I/O pins support programmable pullup/pulldown and capacitive-touch firmware libraries.

Key Specifications

Pinout & Package

The MSP430G2233IRHB32T is housed in a 5 mm × 5 mm, 32-pin VQFN (RHB) package with exposed thermal pad (recommended connection to DVSS). Pin functions are fully defined in TI SLAS734G Rev. April 2016, Section 4.1–4.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2233IRHB32T, the G2333 offers 2× flash for bootloader-safe updates, while the G2433 adds 2× RAM for protocol stack headroom - both retain identical peripheral sets, power profiles, and 32-pin RHB footprint for seamless migration.

Availability

MSP430G2233IRHB32T is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive touch interfaces, industrial LIN slave nodes, low-cost data loggers, and battery-powered metering systems requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2233IRHB32T 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 with emphasis on energy efficiency, reliability, and system integration.

The MSP430G2xx family delivers ultra-low-power mixed-signal MCUs targeting cost-sensitive, battery-operated applications such as sensor transducers, portable medical devices, and human-interface systems - prioritizing microwatt operation and integrated analog front-ends.

FAQ

What is the maximum operating frequency of the MSP430G2233IRHB32T?

The MSP430G2233IRHB32T supports a maximum system clock (MCLK) frequency of 16 MHz at VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC ≥ 1.8 V. This is achieved using the calibrated DCO oscillator; external crystals up to 16 MHz may also drive MCLK via the XT2 oscillator path if enabled.

Does the MSP430G2233IRHB32T include hardware support for capacitive touch sensing?

Yes, the MSP430G2233IRHB32T features 24 GPIO pins with integrated Schmitt triggers, programmable hysteresis, and dedicated timer resources optimized for capacitive touch firmware libraries. No external RC network or dedicated touch ASIC is required - raw electrode signals are sampled directly by the 10-bit ADC or comparator module.

Can the MSP430G2233IRHB32T operate from a single 1.8-V supply?

Yes, the MSP430G2233IRHB32T is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it delivers 6 MHz maximum MCLK, 230 µA active current at 1 MHz, and retains full functionality of ADC, timers, USCI, and I/O - making it ideal for single-cell lithium or alkaline battery systems.

What debug interface does the MSP430G2233IRHB32T use?

The MSP430G2233IRHB32T uses the two-wire Spy-Bi-Wire (SBW) interface for programming and real-time debugging. Pins RST/NMI/SBWTDIO (pin 23) and TEST/SBWTCK (pin 24) connect to TI's MSP-FET or compatible debuggers - eliminating the need for a 4-pin JTAG header and reducing PCB footprint.

Is the ADC on the MSP430G2233IRHB32T capable of autonomous operation?

Yes, the 10-bit ADC supports autoscan mode with hardware-triggered conversions and DMA transfer to memory - allowing continuous multi-channel sampling without CPU intervention. Internal reference, sample-and-hold, and configurable conversion timing enable reliable analog acquisition in low-power modes like LPM3.