Texas Instruments MSP430G2433IPW28

Overview

MSP430G2433IPW28 from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 8 KB flash, 512 B RAM, a 10-bit 200-ksps ADC with 8 channels, two 16-bit Timer_A modules (each with three capture/compare registers), USCI supporting UART/LIN/IrDA/SPI/I²C, and up to 24 capacitive-touch-capable I/O pins in a 28-pin TSSOP package. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and touch interfaces.

For engineers reviewing the MSP430G2433IPW28 datasheet, MSP430G2433IPW28 pinout, MSP430G2433IPW28 application, or MSP430G2433IPW28 equivalent, key selection criteria include its calibrated DCO (up to 16 MHz), sub-1 µs wake-up from standby mode, integrated brownout detector, Spy-Bi-Wire debug interface, and ADC reference flexibility (internal/external/VREF±).

Technical Context

The MSP430G2433IPW28 implements a 16-bit RISC CPU with constant generators for high code efficiency and integrates a digitally controlled oscillator (DCO) that enables ultra-fast wake-up (<1 µs) from LPM3/LPM4. Its clock system supports multiple sources: internal VLO, 32-kHz crystal (XT1), external digital clock, and calibrated DCO frequencies (1/2/4/8/12/16 MHz).

Peripherals are tightly coupled to low-power operation: the 10-bit ADC includes sample-and-hold, autoscan, and DMA channel support; USCI_A0 provides LIN-compliant UART with automatic baud-rate detection; USCI_B0 supports master/slave SPI and I²C; and all 24 GPIO pins support interrupt, pullup/pulldown, and capacitive-touch sensing without external components.

Key Specifications

Pinout & Package

TSSOP-28 package (9.7 mm × 4.4 mm), thermally enhanced with exposed pad option (not used in PW28 variant); RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2533IPW28, the MSP430G2433IPW28 saves cost with 8 KB flash while retaining full peripheral compatibility; versus MSP430FR2433IPW28, it trades FRAM endurance and lower active current for proven flash reliability and code-protection security-making it ideal for fixed-function, security-sensitive sensor endpoints.

Availability

MSP430G2433IPW28 is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive touch interfaces, industrial monitors, and portable medical devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.

Supply support for MSP430G2433IPW28 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 decades of expertise in ultra-low-power design and industrial-grade reliability.

The MSP430G2x33 product line delivers cost-optimized, mixed-signal microcontrollers targeting battery-operated sensor systems, human-interface devices, and energy-constrained industrial controls-emphasizing integration, power efficiency, and ease of development.

FAQ

What is the maximum operating frequency of the MSP430G2433IPW28?

The MSP430G2433IPW28 supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. At 2.7 V, max frequency is 12 MHz; at 1.8 V, it is limited to 6 MHz. These limits are defined by the DCO's electrical characteristics and ensure reliable flash execution and peripheral timing compliance.

Does the MSP430G2433IPW28 include hardware support for capacitive touch sensing?

Yes, the MSP430G2433IPW28 supports capacitive touch sensing on up to 24 I/O pins without external components. It uses the integrated CTSIO module with charge-transfer measurement, configurable thresholds, and built-in baseline tracking-enabling robust button, slider, and wheel implementations directly in firmware.

Can the MSP430G2433IPW28 operate from a single 1.8-V supply?

Yes, the MSP430G2433IPW28 is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it delivers 6 MHz system clock performance, 230 µA active current at 1 MHz, and retains full functionality of ADC, timers, and USCI modules-making it suitable for single-cell lithium primary or rechargeable systems.

What debug interface does the MSP430G2433IPW28 use?

The MSP430G2433IPW28 uses the two-wire Spy-Bi-Wire (SBW) interface for programming and debugging, accessible via RST/NMI/SBWTDIO and TEST/SBWTCK pins. This eliminates the need for a full 4-wire JTAG header, reducing PCB footprint and enabling in-system debug with minimal pin overhead.

Is the ADC on the MSP430G2433IPW28 capable of simultaneous sampling?

No, the MSP430G2433IPW28 features a single 10-bit SAR ADC with sequential autoscan across up to 8 channels. It does not support true simultaneous sampling. However, its 200-ksps conversion rate and hardware-triggered autoscan allow rapid interleaved acquisition with minimal inter-channel skew for most sensor fusion applications.