Texas Instruments MSP430G2433IRHB32R

Overview

MSP430G2433IRHB32R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB flash, 512 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 (RHB) package. It targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2433IRHB32R datasheet, MSP430G2433IRHB32R pinout, MSP430G2433IRHB32R application, or MSP430G2433IRHB32R equivalent, key selection criteria include its 1.8–3.6 V supply range, sub-1 µs wake-up from standby mode, integrated ADC with autoscan, Spy-Bi-Wire debug interface, and QFN-32 package with AVCC/DVCC separation for analog-digital noise isolation.

Technical Context

The MSP430G2433IRHB32R implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO) calibrated at factory for 1/2/4/8/12/16 MHz operation. Its clock system integrates LF crystal support (32 kHz), internal VLO, and external digital clock input - enabling precise timing control across five low-power modes.

Peripherals are tightly coupled to the power management architecture: the 10-bit ADC supports sample-and-hold and DMA-triggered autoscan; USCI_A0 provides LIN-compliant UART with automatic baud-rate detection; USCI_B0 delivers hardware I²C and SPI; and both Timer_A modules support capture, compare, PWM, and interval timing with independent clock sources (ACLK, SMCLK, MCLK).

Key Specifications

Pinout & Package

Package: 32-pin VQFN (RHB), 5 mm × 5 mm body, exposed thermal pad (recommended connection to DVSS). Pinout validated per TI SLAS734G Figure 4-3 and Table 4-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2433IRHB32R, the MSP430G2533IRHB32R offers double flash capacity with zero trade-offs in power or peripheral functionality, while the MSP430G2403IRHB32R removes the ADC entirely - making it a functional subset rather than a true alternative for analog-intensive designs.

Availability

MSP430G2433IRHB32R is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive touch interfaces, portable data loggers, and low-cost power monitors requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.

Supply support for MSP430G2433IRHB32R 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 was engineered for cost-sensitive, battery-operated measurement and control applications - emphasizing minimal active/standby current, integrated analog peripherals, and robust debug infrastructure in compact packages.

FAQ

What is the maximum operating frequency of the MSP430G2433IRHB32R?

The MSP430G2433IRHB32R supports a maximum system clock (MCLK) frequency of 16 MHz at VCC = 3.3 V, 12 MHz at 2.7 V, and 6 MHz at 1.8 V. This is achieved using the factory-calibrated DCO oscillator; external crystals up to 16 MHz are not supported - only 32-kHz LF crystals and digital clock sources are valid for XIN/XOUT.

Does the MSP430G2433IRHB32R include a hardware multiplier?

No, the MSP430G2433IRHB32R does not include a hardware multiplier. It relies on software-based multiplication routines executed by the 16-bit CPU. For applications requiring frequent multiply-accumulate operations, consider MSP430FRxx or MSP430F5xx families which integrate a 16×16-bit hardware multiplier.

Can the MSP430G2433IRHB32R operate from a single 1.8-V supply?

Yes, the MSP430G2433IRHB32R operates across 1.8 V to 3.6 V. At 1.8 V, maximum system frequency is 6 MHz, active current is ~230 µA at 1 MHz, and flash programming requires ≥2.2 V - so 1.8 V is valid only for runtime, not programming. AVCC must equal or exceed DVCC and be properly decoupled.

How many ADC channels does the MSP430G2433IRHB32R support?

The MSP430G2433IRHB32R supports eight ADC10 input channels (A0–A7) mapped to P1.x pins. All channels share the same 10-bit SAR converter and can be scanned automatically in sequence using the ADC10's autoscan mode - enabling rapid multi-sensor acquisition without CPU intervention.

Is the MSP430G2433IRHB32R pin-compatible with other RHB32-packaged MSP430G2x33 devices?

Yes, the MSP430G2433IRHB32R is fully pin-compatible with MSP430G2533IRHB32R, MSP430G2333IRHB32R, and MSP430G2233IRHB32R in the RHB32 package. Differences are limited to flash size (16/8/4/2 KB), RAM (512/512/256/256 B), and factory calibration data - all share identical pin functions, electrical characteristics, and timing behavior.