Texas Instruments MSP430G2533IRHB32T

Overview

MSP430G2533IRHB32T from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 16 KB flash, 512 B RAM, 10-bit 200-ksps ADC, 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 I/O pins in a 32-pin VQFN package. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and touch interfaces.

For engineers reviewing the MSP430G2533IRHB32T datasheet, MSP430G2533IRHB32T pinout, MSP430G2533IRHB32T application, or MSP430G2533IRHB32T equivalent, key selection criteria include its 16 KB flash capacity, integrated 10-bit ADC with internal reference, Spy-Bi-Wire debug interface, 32-pin QFN thermal performance, and support for LIN-compliant UART auto-baud detection in low-power systems.

Technical Context

The MSP430G2533IRHB32T implements a 16-bit CPU with constant generators and six operating modes-including five power-saving states-enabling sub-1 µs wake-up from standby (0.5 µA) and ultra-low active current (230 µA at 1 MHz, 2.2 V). Its clock system integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies up to 16 MHz, plus support for 32-kHz crystal, internal VLO, and external digital sources.

Peripherals are tightly coupled to low-power operation: the 10-bit ADC supports autoscan across eight channels with sample-and-hold and internal voltage reference; USCI_A0 delivers LIN-capable UART with automatic baud-rate detection; and Timer_A modules provide precise PWM, capture, and interval timing with independent clocking (ACLK, SMCLK, MCLK).

Key Specifications

Pinout & Package

Package: 32-pin VQFN (RHB), 5 mm × 5 mm body, exposed thermal pad (recommended connection to DVSS), 0.5 mm pitch. Designed for high-density PCB layouts and improved thermal dissipation in compact industrial and portable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2433IRHB32T and MSP430FR2433IRHBR, the MSP430G2533IRHB32T offers the largest flash capacity in the G2x33 QFN family and maintains full peripheral compatibility-making it optimal for feature-rich firmware deployments where code growth headroom and legacy toolchain continuity are critical.

Availability

MSP430G2533IRHB32T is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive touch interfaces, industrial LIN subnodes, portable data loggers, and battery-powered metering systems requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2533IRHB32T 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 microcontrollers for industrial and consumer applications.

The MSP430G2xx family was designed specifically for cost-sensitive, battery-operated applications demanding extended runtime, integrated analog peripherals, and minimal external components-targeting sensor systems, human-interface devices, and simple control nodes.

FAQ

What is the maximum system clock frequency supported by the MSP430G2533IRHB32T?

The MSP430G2533IRHB32T 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 in the Recommended Operating Conditions table and enforced by the DCO calibration settings stored in flash.

Does the MSP430G2533IRHB32T include hardware support for capacitive touch sensing?

Yes, the MSP430G2533IRHB32T supports capacitive touch sensing on up to 24 I/O pins (P1.x, P2.x, P3.x) using its integrated CSIO (Capacitive Sense I/O) hardware. This includes built-in charge-transfer measurement, software-configurable thresholds, and low-power scan modes-eliminating the need for external touch controller ICs in most button/slider implementations.

Can the MSP430G2533IRHB32T operate without an external crystal?

Yes, the MSP430G2533IRHB32T can operate entirely from its internal digitally controlled oscillator (DCO), which is factory-calibrated at four frequencies (1/2/4/8 MHz) and supports up to 16 MHz. External crystals (e.g., 32.768 kHz) are optional and used only when precise timing-such as RTC or LIN synchronization-is required.

What debug interface does the MSP430G2533IRHB32T use, and what tools are compatible?

The MSP430G2533IRHB32T uses the Spy-Bi-Wire (SBW) interface on pins 23 (SBWTDIO) and 24 (SBWTCK) for programming and debugging. It is fully compatible with TI's MSP-FET debugger, MSP430 LaunchPad development kits (e.g., MSP-EXP430G2ET), and third-party tools supporting SBW, including IAR Embedded Workbench and Code Composer Studio.

How many ADC channels does the MSP430G2533IRHB32T support, and what reference options are available?

The MSP430G2533IRHB32T includes a 10-bit ADC10 module with eight input channels (A0–A7). Reference options include internal 1.5-V or 2.5-V references, external reference applied to VREF+/VREF− pins, or AVCC as reference. Internal references are trimmed and stable across temperature, enabling accurate measurements without external precision voltage sources.