Texas Instruments MSP430G2333IRHB32T

Overview

MSP430G2333IRHB32T from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 4 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 supporting UART/LIN/IrDA/SPI/I²C, and up to 24 capacitive-touch-enabled I/O pins in a 32-pin QFN package. It targets battery-powered sensor nodes and portable measurement systems requiring sub-1-µs wake-up and <0.1 µA off-mode current.

For engineers reviewing the MSP430G2333IRHB32T datasheet, MSP430G2333IRHB32T pinout, MSP430G2333IRHB32T application, or MSP430G2333IRHB32T equivalent, key selection criteria include verified 16-MHz DCO operation at 3.3 V, calibrated internal oscillator frequencies (1/8/12/16 MHz), ADC linearity (±1 LSB INL), Spy-Bi-Wire debug interface, and QFN-32 package thermal performance (θ_JA = 42.7°C/W).

Technical Context

The MSP430G2333IRHB32T implements a 16-bit CPU with constant generators and 16 registers for optimized code density. Its clock system integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies, a low-frequency VLO, and support for 32-kHz crystal or external digital clock sources - enabling precise timing control across five power-saving modes.

Peripherals include dual Timer_A modules (each with three CC registers), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and a 10-bit ADC with sample-and-hold, autoscan, and built-in temperature sensor. Port P3 is available only on 28- and 32-pin packages, confirming full I/O access in the RHB32 variant.

Key Specifications

Pinout & Package

Package: 32-pin VQFN (RHB), 5 mm × 5 mm, exposed thermal pad recommended to connect to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2433IRHB32T and MSP430G2533IRHB32T, the MSP430G2333IRHB32T delivers identical peripheral functionality and ultra-low-power behavior at the lowest memory cost - making it ideal for cost-sensitive, battery-constrained designs where 4 KB flash suffices.

Availability

MSP430G2333IRHB32T is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial touch interfaces, and energy-harvesting IoT endpoints requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2333IRHB32T 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 power efficiency and system integration.

The MSP430G2x33 product line is designed for ultra-low-power mixed-signal applications including sensor interfacing, capacitive touch, and portable instrumentation - prioritizing battery life, integrated analog capability, and minimal external component count.

FAQ

What is the maximum system clock frequency supported by the MSP430G2333IRHB32T?

The MSP430G2333IRHB32T supports a maximum system clock (MCLK) frequency of 16 MHz at VCC = 3.3 V with 50% ±10% duty cycle, enabled by its factory-calibrated DCO. This frequency is confirmed in the Recommended Operating Conditions table (Section 5.3) and applies directly to the MSP430G2333IRHB32T in its 32-pin QFN package under specified voltage and temperature conditions.

Does the MSP430G2333IRHB32T include an integrated ADC, and what are its key specifications?

Yes, the MSP430G2333IRHB32T includes a 10-bit successive-approximation ADC (ADC10) with 8 input channels, 200-ksps sampling rate, internal reference (1.5 V or 2.5 V), sample-and-hold, autoscan mode, and ±1 LSB integral nonlinearity. These specifications are explicitly documented in Sections 1.1, 5.29–5.34 of the SLAS734G datasheet and apply to the MSP430G2333IRHB32T as a member of the G2x33 family.

How many I/O pins on the MSP430G2333IRHB32T support capacitive touch sensing?

The MSP430G2333IRHB32T supports capacitive touch sensing on up to 24 I/O pins - all P1.x, P2.x, and P3.x pins - as stated in the Features section (1.1) and confirmed in the Device Comparison table (Table 3-1). This capability is inherent to the G2x33 family and fully available in the 32-pin RHB package used by the MSP430G2333IRHB32T.

What debug interface does the MSP430G2333IRHB32T use, and how is it implemented physically?

The MSP430G2333IRHB32T uses the Spy-Bi-Wire (SBW) interface, implemented via two dedicated pins: RST/NMI/SBWTDIO (Pin 23) and TEST/SBWTCK (Pin 24). This 2-wire JTAG-compatible interface enables full programming and debugging without requiring a 4-pin JTAG header, reducing PCB footprint and connector cost while maintaining compatibility with TI's MSP-FET and LaunchPad tools.

Is the MSP430G2333IRHB32T pin-compatible with other devices in the MSP430G2x33 family?

Yes, the MSP430G2333IRHB32T is pin-compatible with other 32-pin QFN variants in the MSP430G2x33 family, including MSP430G2433IRHB32T and MSP430G2533IRHB32T. All share identical RHB32 pinout, power/ground assignments, peripheral mappings, and I/O functions - allowing drop-in replacement within the same package footprint when memory requirements change.