Texas Instruments MSP430G2402IRSA16T

Overview

MSP430G2402IRSA16T from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in a 16-pin QFN package, featuring 8 KB Flash, 256 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and up to 16 capacitive-touch enabled I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430G2402IRSA16T datasheet, MSP430G2402IRSA16T pinout, MSP430G2402IRSA16T application, or MSP430G2402IRSA16T equivalent, key selection criteria include its 8 KB Flash/256 B RAM memory configuration, USI-based serial communication capability, 5 low-power modes (including sub-1 µs wake-up), Spy-Bi-Wire debug interface, and absence of integrated ADC-distinguishing it from the MSP430G2x32 series.

Technical Context

The MSP430G2402IRSA16T implements a 16-bit CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one CPU clock cycle. Its basic clock module integrates a digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz, plus internal LF and external crystal options, enabling flexible system clocking without external components.

Power management is handled via six operating modes: Active Mode (220 µA @ 1 MHz, 2.2 V), LPM0–LPM4 (down to 0.1 µA in off mode with RAM retention), and brownout detection. The device uses Spy-Bi-Wire for on-chip emulation and supports in-system programming without external voltage.

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 microcontroller applications.

Compared with MSP430G2402IRSA16T, the MSP430G2553IRHA4R adds ADC functionality at the cost of higher pin count and no FRAM benefits, while the MSP430FR2111IPW16R trades Flash for FRAM endurance and eliminates USI - making each suitable only for distinct subsystem requirements.

Availability

MSP430G2402IRSA16T is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, portable medical monitors, and asset tracking beacons requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade traceability.

Supply support for MSP430G2402IRSA16T 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The MSP430G2xx family is designed for ultra-low-power embedded applications where extended battery life, compact size, and integrated mixed-signal peripherals are essential - targeting sensor interfaces, portable instrumentation, and energy-harvesting systems.

FAQ

Does MSP430G2402IRSA16T include an integrated analog-to-digital converter (ADC)?

No, MSP430G2402IRSA16T does not include an ADC. It belongs to the MSP430G2x02 series, which omits the ADC10 module present in the G2x32 variants. Pin functions labeled "A0"–"A7" and "VREF+"/"VREF−" are reserved for pin compatibility but are not electrically connected to an ADC core. External ADCs must be used if analog signal digitization is required in designs using MSP430G2402IRSA16T.

What debug interface does MSP430G2402IRSA16T support?

MSP430G2402IRSA16T supports the Spy-Bi-Wire (SBW) interface - a 2-wire subset of JTAG - for programming, debugging, and boundary-scan testing. It uses pins RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). No external voltage is required, and SBW enables full emulation, flash erase/write, and real-time register inspection during development and field updates.

Can MSP430G2402IRSA16T drive capacitive-touch buttons directly?

Yes, MSP430G2402IRSA16T supports up to 16 capacitive-touch enabled I/O pins using its built-in pin-oscillator circuitry. Each supported port pin (P1.0–P1.7, P2.0–P2.5) can be configured for touch sensing without external components. Firmware implements charge-transfer measurement via GPIO toggling and timing - confirmed in the device's functional description and supported by TI's CapTIvate™ software libraries compatible with G2x02 series.

What is the maximum system clock frequency achievable with MSP430G2402IRSA16T?

The MSP430G2402IRSA16T supports a maximum calibrated DCO frequency of 16 MHz, as specified in its factory-trimmed calibration data stored in information memory segment A. This allows full-speed execution of the 16-bit RISC core at 62.5-ns instruction cycle time. Higher frequencies are not supported - the DCO is not user-tunable beyond the four calibrated settings (1/8/12/16 MHz), and no PLL or frequency multiplier is present.

Is MSP430G2402IRSA16T pin-compatible with other devices in the MSP430G2xx family?

MSP430G2402IRSA16T shares the same 16-pin QFN (RSA) package footprint and pinout with other G2xx devices in that package option (e.g., MSP430G2202IRSA16, MSP430G2302IRSA16), but functional pin assignments differ where peripherals vary - notably ADC-related pins (A0–A7, VREF) are NC in G2402. While mechanical layout is identical, firmware and schematic design must account for missing ADC and differing USI/JTAG signal mappings.