Texas Instruments MSP430G2403IRHB32T

Overview

MSP430G2403IRHB32T from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in a 32-pin QFN package, featuring 8 KB flash, 512 B RAM, two 16-bit Timer_A modules with three capture/compare registers each, USCI with UART/LIN/IrDA/SPI/I²C support, and a digitally controlled oscillator (DCO) enabling sub-1 µs wake-up from standby mode. It targets battery-powered sensor interfaces and capacitive-touch systems requiring long runtime and compact footprint.

For engineers reviewing the MSP430G2403IRHB32T datasheet, MSP430G2403IRHB32T pinout, MSP430G2403IRHB32T application, or MSP430G2403IRHB32T equivalent, key selection criteria include its 1.8–3.6 V supply range, 230 µA active current at 1 MHz/2.2 V, Spy-Bi-Wire debug interface, 24-capacitive-touch I/O capability, and absence of integrated ADC - distinguishing it from the MSP430G2433 family.

Technical Context

The MSP430G2403IRHB32T implements a 16-bit CPU with constant generators and 16 registers for high code efficiency. Its clock system integrates a DCO with four factory-calibrated frequencies (up to 16 MHz), internal VLO, and external crystal support (32 kHz or high-frequency via XIN/XOUT), all managed by the Basic Clock Module.

Power management includes five low-power modes (LPM0–LPM4), with standby mode consuming only 0.5 µA and off mode (RAM retention) drawing 0.1 µA. The USCI peripheral supports simultaneous UART (with LIN auto-baud detection), IrDA, SPI, and I²C - all configurable without external components.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm body, exposed thermal pad (to be connected to DVSS). Pin pitch: 0.5 mm. RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2433IRHB32T, the MSP430G2403IRHB32T saves BOM cost and board area by omitting the ADC while retaining identical timing, communication, and ultra-low-power capabilities; versus MSP430G2303IPW28T, it provides double the flash and RAM in a slightly larger but thermally superior QFN package.

Availability

MSP430G2403IRHB32T is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive-touch interfaces, industrial serial gateways, and low-cost data loggers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430G2403IRHB32T 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 MSP430G2x03 product line delivers cost-optimized, energy-efficient 16-bit MCUs targeting battery-operated sensor systems, human-interface devices, and simple automation controllers where ADC is unnecessary.

FAQ

Does MSP430G2403IRHB32T include an integrated analog-to-digital converter (ADC)?

No, the MSP430G2403IRHB32T does not include an ADC. It belongs to the G2x03 subfamily, which omits the 10-bit ADC present in the G2x33 variants (e.g., MSP430G2433IRHB32T). All pin functions referencing ADC10CLK, VREF+, or A0–A7 are not implemented on MSP430G2403IRHB32T, and those pins default to general-purpose I/O or alternate timer/USCI roles.

What is the maximum system clock frequency supported by MSP430G2403IRHB32T?

The MSP430G2403IRHB32T supports a maximum 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. These limits are defined by the DCO's calibrated operating range and ensure stable execution under recommended voltage conditions per SLAS734G Section 5.3.

Which debug interface does MSP430G2403IRHB32T use, and what pins are required?

The MSP430G2403IRHB32T uses the Spy-Bi-Wire (SBW) interface, requiring two dedicated pins: RST/NMI/SBWTDIO (Pin 23) and TEST/SBWTCK (Pin 24). This 2-wire protocol replaces full 4-wire JTAG, reducing PCB footprint and test point count while supporting full flash programming and real-time debugging.

Can MSP430G2403IRHB32T drive a 32.768 kHz crystal, and where are the connections?

Yes, the MSP430G2403IRHB32T supports a 32.768 kHz watch crystal connected to XIN (Pin 26) and XOUT (Pin 25). This crystal feeds the ACLK source for low-power timer operation and real-time clock functions. External load capacitors (typically 12 pF) must be used per TI design guidelines in SLAU144.

How many capacitive-touch I/O pins does MSP430G2403IRHB32T support, and which ports are enabled?

The MSP430G2403IRHB32T supports up to 24 capacitive-touch enabled I/O pins across Ports P1, P2, and P3. In the RHB32 package, all 8 pins of P1 (P1.0–P1.7), all 8 pins of P2 (P2.0–P2.7), and all 8 pins of P3 (P3.0–P3.7) are available and configurable for capacitive sensing using the built-in RC oscillation method described in the MSP430x2xx Family User's Guide (SLAU144).