Texas Instruments MSP430G2432IRSA16T

Overview

MSP430G2432IRSA16T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, USI supporting SPI/I²C, and Timer_A with three capture/compare registers - deployed in battery-powered sensor nodes and capacitive-touch interfaces.

For engineers reviewing the MSP430G2432IRSA16T datasheet, MSP430G2432IRSA16T pinout, MSP430G2432IRSA16T application, or MSP430G2432IRSA16T equivalent, key selection criteria include QFN-16 package footprint, 1.8–3.6 V supply range, sub-1 µs wake-up from LPM4, ADC10 channel count (8), and Spy-Bi-Wire debug compatibility.

Technical Context

The MSP430G2432IRSA16T implements a 16-bit CPU with seven addressing modes and 51 instructions, integrated with a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz for sub-1 µs active-mode wake-up. Its clock system delivers ACLK (LF crystal or internal VLO), SMCLK (DCO-derived), and MCLK (system clock) with brownout detection and programmable power-saving modes (LPM0–LPM4).

Peripheral integration includes a 10-bit SAR ADC with sample-and-hold, internal 1.5 V/2.5 V reference, and DMA-assisted data transfer; USI module configured for synchronous SPI or I²C communication; and Timer_A3 supporting PWM generation, input capture, and interval timing with three independent compare/capture registers and interrupt vectoring.

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2432IRSA16T, the MSP430G2553IRHA48R offers greater memory and UART support but increases board area and removes capacitive-touch hardware; the MSP430FR2355TRHBR provides FRAM durability and richer analog features at the cost of footprint size and touch capability - making MSP430G2432IRSA16T optimal for compact, battery-critical touch-sensing nodes.

Availability

MSP430G2432IRSA16T is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, capacitive-touch remotes, and low-power data loggers requiring stable component supply and long-term production continuity.

Supply support for MSP430G2432IRSA16T 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 over 90 years of innovation in low-power design.

The MSP430G2xx family targets ultra-low-power portable measurement and sensing applications, emphasizing extended battery life, integrated analog peripherals, and minimal external component count - exemplified by the MSP430G2432IRSA16T's QFN-16 footprint and capacitive-touch readiness.

FAQ

What is the maximum ADC10 sampling rate supported by the MSP430G2432IRSA16T?

The MSP430G2432IRSA16T supports a maximum ADC10 sampling rate of 200 kSPS under specified conditions (VCC ≥ 2.2 V, ADC10CLK = 5 MHz). This rate is achievable in single-channel mode with internal reference enabled and sample-and-hold active. The actual sustained throughput depends on conversion configuration, reference source, and clock stability - all documented in Section 5.2 of the SLAS723H datasheet.

Does the MSP430G2432IRSA16T support UART communication?

No, the MSP430G2432IRSA16T does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) module that supports only SPI and I²C protocols. For UART functionality, designers must implement bit-banged software UART on GPIO pins or select a different MSP430 variant such as the MSP430G2553IRHA48R, which integrates USCI with native UART support.

How many capacitive-touch I/O pins are available on the MSP430G2432IRSA16T?

The MSP430G2432IRSA16T supports up to 16 capacitive-touch enabled I/O pins using its integrated PinOsc circuitry. In the 16-pin QFN (RSA) package, all eight P1.x pins (P1.0–P1.7) and up to eight P2.x pins (P2.0–P2.5 plus P2.6–P2.7) can be configured for capacitive sensing - though physical pin count limits simultaneous use to the available I/Os (10 total GPIOs in RSA package: P1.0–P1.7, P2.0–P2.1).

What debug interface does the MSP430G2432IRSA16T use, and what tools are compatible?

The MSP430G2432IRSA16T uses the 2-wire Spy-Bi-Wire (SBW) interface for debugging and programming, accessible via pins RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). It is fully compatible with TI's MSP-FET programmer/debugger and LaunchPad development kits (e.g., MSP-EXP430G2ET), enabling full-speed emulation, flash programming, and real-time register inspection without requiring a 4-wire JTAG header.

Is the MSP430G2432IRSA16T pin-compatible with other devices in the MSP430G2x32 family?

Yes, the MSP430G2432IRSA16T shares identical pinout and electrical characteristics with other 16-pin QFN variants in the MSP430G2x32 series (e.g., MSP430G2332IRSA16, MSP430G2232IRSA16), differing only in flash/RAM size and peripheral configuration. Firmware developed for one can typically run on another after recompilation, provided ADC10 usage aligns with device-specific capabilities - confirmed in Table 1 of SLAS723H.