Texas Instruments MSP430G2102IPW20

Overview

MSP430G2102IPW20 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 20-pin TSSOP package, featuring 1 kB Flash, 128 B RAM, one 16-bit Timer_A with three capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and Spy-Bi-Wire debug interface - designed for battery-powered sensor nodes and capacitive-touch interfaces.

For engineers reviewing the MSP430G2102IPW20 datasheet, MSP430G2102IPW20 pinout, MSP430G2102IPW20 application, or MSP430G2102IPW20 equivalent, key selection criteria include its 1.8–3.6 V supply range, sub-1 µs wake-up from standby mode, integrated DCO clock system with calibrated frequencies up to 16 MHz, and support for up to 8 I/O pins with programmable pullup/pulldown and capacitive-touch capability.

Technical Context

The MSP430G2102IPW20 implements a 16-bit CPU with seven addressing modes and 51-instruction set, executing register-to-register operations in one CPU cycle. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external crystal support via XIN/XOUT pins - enabling flexible low-power timing across five software-selectable LPM modes.

Peripherals are memory-mapped and accessible via standard instructions: USI handles synchronous serial communication using shared P1.6/P1.7 pins for SPI/I²C, Timer_A supports PWM generation and input capture on P1.0–P1.5, and digital I/O includes interrupt-capable edge-selectable inputs with individually configurable pull resistors on all 8 P1 and 8 P2 pins.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW package), 0.65 mm pitch, body size 6.5 × 4.4 mm, JEDEC MO-153 compliant. Thermal pad not present; standard surface-mount assembly compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2102IPW20, MSP430G2202IPW20 offers double Flash/RAM for feature-rich firmware, while MSP430G2112IPW20 improves serial interface robustness - both retain identical power consumption, packaging, and core timing behavior for drop-in migration in existing layouts.

Availability

MSP430G2102IPW20 is available at Aetrix Electronics and suitable for smart sensor nodes, capacitive-touch interfaces, industrial remote monitors, and low-cost data loggers requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2102IPW20 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 energy efficiency and system integration.

The MSP430G2xx family targets ultra-low-power embedded applications such as portable instrumentation, wireless sensor networks, and human-interface devices - where extended battery life and minimal BOM cost are critical design constraints.

FAQ

Does MSP430G2102IPW20 include an integrated ADC?

No, the MSP430G2102IPW20 does not include an integrated ADC. It belongs to the MSP430G2x02 series, which omits the ADC10 module present in the G2x32 variants. Analog sensing requires external ADC or voltage-level detection via comparator peripherals not implemented in this device. The MSP430G2102IPW20 retains full GPIO, timer, and USI functionality for digital-only signal conditioning and communication tasks.

What debug interface does MSP430G2102IPW20 support?

The MSP430G2102IPW20 supports the two-wire Spy-Bi-Wire (SBW) interface using pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). This interface enables full in-circuit programming, flash erase/write, and real-time debugging without requiring a full 4-wire JTAG connection. TI's MSP-FET and LaunchPad development tools natively support SBW for MSP430G2102IPW20 firmware development and validation.

Can MSP430G2102IPW20 operate from a 3.3 V supply?

Yes, MSP430G2102IPW20 operates across a supply range of 1.8 V to 3.6 V, making 3.3 V fully supported. At 3.3 V, active-mode current increases slightly versus 2.2 V (e.g., ~250 µA @ 1 MHz), but all timing specifications, Flash programming voltage tolerance, and I/O logic levels remain valid. No level-shifting is required for interfacing with standard 3.3 V peripherals.

Is MSP430G2102IPW20 pin-compatible with other MSP430G2xx TSSOP-20 devices?

Yes, MSP430G2102IPW20 shares identical pinout and package dimensions with all MSP430G2xx 20-pin TSSOP variants (e.g., MSP430G2202IPW20, MSP430G2302IPW20, MSP430G2402IPW20). Functionally identical pins (DVCC, DVSS, RST, TEST, XIN/XOUT, P1.x, P2.x) occupy the same locations, enabling direct PCB replacement when memory or peripheral requirements change - provided firmware is updated to match the new device's capabilities.

What is the maximum operating frequency of MSP430G2102IPW20?

The MSP430G2102IPW20 supports a maximum system clock frequency of 16 MHz via its digitally controlled oscillator (DCO), with four factory-calibrated frequencies (1/2/4/8 MHz) and fine-tuning capability using DCOCTL/BCSCTL1 registers. While the DCO can be modulated to reach 16 MHz, stable operation at that rate requires proper calibration and supply voltage ≥2.2 V; typical applications use 1–8 MHz for optimal power/performance trade-off.