Texas Instruments MSP430G2402IN20

Overview

MSP430G2402IN20 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller in 20-pin PDIP packaging, 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 support for up to 16 capacitive-touch I/O pins. It operates from 1.8 V to 3.6 V and targets battery-powered sensor nodes and portable instrumentation.

For engineers reviewing the MSP430G2402IN20 datasheet, MSP430G2402IN20 pinout, MSP430G2402IN20 application, or MSP430G2402IN20 equivalent, key selection criteria include its 8 KB Flash capacity, USI-based serial interface compatibility, 20-pin PDIP package footprint, and absence of integrated ADC10 - distinguishing it from the MSP430G2x32 series.

Technical Context

The MSP430G2402IN20 implements a 16-bit CPU with seven addressing modes and 51 instructions, executing register-to-register operations in one CPU cycle. Its basic clock module integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external crystal support (32 kHz), enabling sub-1 µs wake-up from LPM4.

It features two 8-bit digital I/O ports (P1 and P2), each with individually configurable pullup/pulldown resistors, edge-selectable interrupts, and pin-oscillator enable for capacitive touch. The USI module supports synchronous full-duplex SPI and I²C protocols using shared pins P1.6/P1.7 and software-configurable control logic.

Key Specifications

Pinout & Package

Package: 20-pin Plastic Dual In-line Package (PDIP), 0.600-inch width, through-hole mounting. Pin pitch: 0.100 inch. Compatible with standard DIP sockets and wave-soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2402IN20, the MSP430G2553IPW20 adds essential ADC capability at the cost of higher pin count and no PDIP option, while the MSP430FR2111IPW16 trades Flash density for superior write endurance and lower active power - making each suitable for distinct subsystem roles in ultra-low-power designs.

Availability

MSP430G2402IN20 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI panels, portable medical monitors, and energy harvesting endpoints requiring stable component supply across long-lifecycle embedded programs.

Supply support for MSP430G2402IN20 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 and system integration.

The MSP430G2xx family was designed specifically for ultra-low-power applications in portable instrumentation, sensor systems, and battery-operated devices - prioritizing nanowatt operation, fast wake-up, and minimal external component count.

FAQ

Does MSP430G2402IN20 include an integrated analog-to-digital converter (ADC)?

No, MSP430G2402IN20 does not include an ADC module. It belongs to the MSP430G2x02 series, which omits the ADC10 peripheral present in the MSP430G2x32 series. This is explicitly confirmed in Table 1 (ADC10 column shows "–" for MSP430G2402IN20) and the functional block diagram labeled "MSP430G2x02". External ADCs must be used if analog signal conversion is required.

What package type and pin count does MSP430G2402IN20 use?

MSP430G2402IN20 uses a 20-pin Plastic Dual In-line Package (PDIP) with 0.600-inch body width and 0.100-inch pin pitch. This through-hole package is documented in Table 1 under "Package Type" and verified in the "N OR PW PACKAGE (TOP VIEW)" diagram. It provides full access to all 16 I/O pins (P1.0–P1.7, P2.0–P2.7), power, ground, and debug signals.

Can MSP430G2402IN20 support capacitive touch sensing?

Yes, MSP430G2402IN20 supports capacitive touch sensing on up to 16 I/O pins. All P1.x and P2.x pins include a pin-oscillator enable bit (P1SEL/P2SEL bits) that configures them for low-power RC-oscillator-based touch detection. This capability is explicitly listed in the FEATURES section and applies to the entire MSP430G2x02 series, including MSP430G2402IN20.

What clock sources are available on MSP430G2402IN20?

MSP430G2402IN20 supports three clock sources: an internal digitally controlled oscillator (DCO) with four factory-calibrated frequencies (1/8/12/16 MHz), an internal very-low-power low-frequency oscillator (VLO ≈ 12 kHz), and an external 32-kHz crystal connected to XIN/XOUT (P2.6/P2.7). These are managed by the Basic Clock System+ (BCS+) module and detailed in the Oscillator and System Clock section.

Is MSP430G2402IN20 compatible with Spy-Bi-Wire debugging?

Yes, MSP430G2402IN20 fully supports Spy-Bi-Wire (SBW) debugging and programming using pins 10 (RST/NMI/SBWTDIO) and 11 (TEST/SBWTCK). This 2-wire interface replaces full JTAG, reducing PCB footprint and connector cost. SBW operation is enabled by default after reset and is documented in the Emulation Logic section and Table 2 terminal functions.