Texas Instruments MSP430G2452IRSA16R

Overview

MSP430G2452IRSA16R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring a 10-bit 200-ksps ADC, Universal Serial Interface (SPI/I²C), one 16-bit Timer_A with three capture/compare registers, and up to 16 capacitive-touch-enabled I/O pins. It operates from 1.8 V to 3.6 V and supports five power-saving modes - ideal for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2452IRSA16R datasheet, MSP430G2452IRSA16R pinout, MSP430G2452IRSA16R application, or MSP430G2452IRSA16R equivalent, key selection criteria include its QFN-16 package, integrated ADC10 with internal reference and autoscan, Spy-Bi-Wire debug interface, and calibrated DCO enabling sub-1 µs wake-up from LPM4.

Technical Context

The MSP430G2452IRSA16R implements a 16-bit CPU with seven addressing modes and 51 instructions, paired with a basic clock module supporting ACLK (LF oscillator or 32-kHz crystal), SMCLK, and MCLK sourced from a digitally controlled oscillator (DCO) with four factory-calibrated frequencies up to 16 MHz. Its interrupt system includes maskable sources from ADC10, USI, Timer_A, and ports P1/P2 - all mapped to dedicated vectors in the 0xFFFE–0xFFC0 range.

Peripheral integration follows the MSP430x2xx architecture: ADC10 uses internal reference (VREF+/VREF−), sample-and-hold, and autoscan across eight analog inputs (A0–A7); USI provides hardware SPI and I²C with SDO/SDI/SCL/SDA on shared pins; Comparator_A+ offers eight input channels with CAOUT output and programmable hysteresis - all accessible via memory-mapped registers at fixed offsets (e.g., ADC10CTL0 at 0x01B0, TACCTL0 at 0x0162).

Key Specifications

Pinout & Package

Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.4 mm pitch, exposed thermal pad recommended to be connected to DVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2452IRSA16R, the MSP430G2553IRHA4R offers more memory and peripherals but demands board rework, while the MSP430FR2355TRHBR trades flash endurance for FRAM flexibility at higher active power - both require firmware adaptation and are not pin-compatible replacements.

Availability

MSP430G2452IRSA16R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial HMIs, and energy-harvesting IoT endpoints requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2452IRSA16R 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 50 years of microcontroller innovation.

The MSP430G2xx series was designed for ultra-low-power mixed-signal applications where battery life, small form factor, and integrated analog peripherals - such as ADC10, Comparator_A+, and USI - are critical to system-level efficiency.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2452IRSA16R?

The MSP430G2452IRSA16R supports a maximum ADC10 sampling rate of 200 kS/s under optimal conditions (VCC = 3.0 V, ADC10CLK = 5 MHz). This rate assumes internal reference use and autoscan disabled; actual throughput depends on conversion mode, reference selection, and clock source stability. The ADC10 module includes a built-in sample-and-hold circuit and data transfer controller to minimize CPU involvement during high-speed acquisition.

Does the MSP430G2452IRSA16R support hardware UART communication?

No, the MSP430G2452IRSA16R does not include a dedicated UART peripheral. It features a Universal Serial Interface (USI) that supports SPI and I²C protocols only. UART functionality must be implemented in software using Timer_A and GPIO pins - though this increases CPU load and timing sensitivity. For hardware UART, consider the pin-compatible MSP430G2553IRHA4R, which integrates USCI_A0 with UART capability.

How many analog input channels are accessible on the MSP430G2452IRSA16R QFN-16 package?

The MSP430G2452IRSA16R provides eight ADC10 analog input channels (A0–A7), but only six are physically accessible on the 16-pin QFN package: A0 (P1.0), A1 (P1.1), A2 (P1.2), A3 (P1.3), A4 (P1.4), and A5 (P1.5). A6 and A7 are assigned to P1.6 and P1.7 respectively, but those pins are multiplexed with USI and JTAG functions and are not designated as analog inputs in the RSA package pinout per Table 2 of SLAS722G.

Can the MSP430G2452IRSA16R operate from a 32.768-kHz crystal for real-time clock functions?

Yes, the MSP430G2452IRSA16R supports connection of a 32.768-kHz crystal between XIN (P2.6) and XOUT (P2.7) to drive the ACLK signal, enabling accurate real-time clock (RTC) functionality. The basic clock module includes automatic fault detection and fallback to the internal VLO oscillator if the crystal fails. ACLK can then feed Timer_A or the RTC library in MSP430Ware to implement calendar timekeeping with typical ±20 ppm accuracy at 25°C.

What debug interface does the MSP430G2452IRSA16R use, and is external hardware required?

The MSP430G2452IRSA16R uses the 2-wire Spy-Bi-Wire (SBW) interface via RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). No external JTAG header is needed - programming and debugging are performed through these two pins using TI's MSP-FET programmer or compatible LaunchPad development kits. SBW is fully supported by Code Composer Studio and Energia IDE for flash download, breakpoint setting, and register inspection.