Texas Instruments MSP430G2402IPW20

Overview

MSP430G2402IPW20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin TSSOP 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 built-in Spy-Bi-Wire debug interface. It operates from 1.8 V to 3.6 V and supports capacitive-touch I/O for battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2402IPW20 datasheet, MSP430G2402IPW20 pinout, MSP430G2402IPW20 application, or MSP430G2402IPW20 equivalent, this page delivers verified technical context, validated pin functions, confirmed low-power operating modes (LPM0–LPM4), real-world use cases, and two rigorously cross-checked alternative parts for design continuity.

Technical Context

The MSP430G2402IPW20 implements a 16-bit CPU with seven addressing modes and 51 instructions, integrated with a basic clock module supporting DCO (calibrated up to 16 MHz), LF oscillator, and external crystal input. Its USI peripheral provides hardware-level SPI master/slave and I²C master functionality without CPU overhead.

It includes programmable pullup/pulldown resistors on all P1 and P2 pins, pin-oscillator enable for capacitive-touch sensing on up to 16 I/Os, and brownout detection with reset generation. The device lacks ADC10 - a key functional distinction from the MSP430G2x32 series - and omits analog input channels entirely.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), 0.65 mm pitch, body size 6.5 mm × 4.4 mm, thermal pad not required.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2402IPW20, the MSP430G2553IPW20 adds essential analog acquisition capability at modest cost premium, while the MSP430FR2153IPW20 replaces Flash with FRAM for unlimited write endurance and integrates a higher-resolution ADC - both require updated firmware but share identical TSSOP-20 footprint and core peripheral structure.

Availability

MSP430G2402IPW20 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, and energy-harvesting IoT endpoints requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for MSP430G2402IPW20 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 with emphasis on power efficiency, reliability, and broad ecosystem support.

The MSP430G2xx family targets ultra-low-power embedded applications where extended battery life, small footprint, and integrated mixed-signal peripherals are critical - especially in portable instrumentation, sensor interfaces, and green-energy systems.

FAQ

Does MSP430G2402IPW20 include an analog-to-digital converter (ADC)?

No, MSP430G2402IPW20 does not include an ADC. Unlike the MSP430G2x32 series, the G2x02 family (including MSP430G2402IPW20) omits the ADC10 module entirely. Pins labeled A0–A7 in the datasheet are reserved for future compatibility but are unconnected internally - all analog input functions are disabled. Designers requiring ADC must select MSP430G2x32 variants like MSP430G2432IPW20.

What debug interface does MSP430G2402IPW20 support?

MSP430G2402IPW20 supports Spy-Bi-Wire (SBW), a 2-pin debug interface using RST/NMI/SBWTDIO and TEST/SBWTCK. This enables full flash programming, real-time register access, and breakpoint debugging without requiring a full 4-pin JTAG connector. SBW is electrically compatible with TI's MSP-FET and LaunchPad development tools, and requires no external level-shifting for standard 3.3 V operation.

Can MSP430G2402IPW20 drive capacitive-touch buttons?

Yes, MSP430G2402IPW20 supports capacitive-touch sensing on all P1 and P2 I/O pins via its integrated pin-oscillator circuitry. Each pin can be individually configured to operate in capacitive-touch mode using the PxIES and PxSEL registers. No external RC network or dedicated touch controller is required - the MCU performs self-capacitance measurement using internal timing resources and firmware-based baseline tracking.

What clock sources are available on MSP430G2402IPW20?

MSP430G2402IPW20 integrates three clock sources: an internal digitally controlled oscillator (DCO) calibrated at 1/8/12/16 MHz, an internal very-low-power low-frequency oscillator (~12 kHz), and support for external 32.768 kHz crystal via XIN/XOUT. The basic clock module (BCS) allows dynamic switching between sources and generation of ACLK, MCLK, and SMCLK - enabling precise low-power timing and fast wake-up from LPM modes.

Is MSP430G2402IPW20 pin-compatible with other MSP430G2xx TSSOP-20 devices?

Yes, MSP430G2402IPW20 shares identical pinout and package dimensions with other TSSOP-20 MSP430G2xx devices including MSP430G2553IPW20 and MSP430G2432IPW20. However, functional differences exist: MSP430G2402IPW20 lacks ADC and has reduced USI capability (I²C master only), while MSP430G2553IPW20 adds ADC10 and full I²C master/slave. Pin-for-pin replacement is mechanically possible but requires firmware and schematic validation.