Texas Instruments MSP430G2221IPW14

Overview

MSP430G2221IPW14 from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 2 kB flash, 128 B RAM, a 16-bit Timer_A with two capture/compare registers, Universal Serial Interface (USI) supporting SPI and I²C, and a 10-bit ADC - all in a 14-pin TSSOP package. It targets battery-powered sensor nodes requiring sub-1 µs wake-up, <0.5 µA standby current, and integrated analog-to-digital conversion.

For engineers reviewing the MSP430G2221IPW14 datasheet, MSP430G2221IPW14 pinout, MSP430G2221IPW14 application, or MSP430G2221IPW14 equivalent, this page delivers verified technical context, exact pin functions, real low-power mode currents, confirmed peripheral capabilities, and validated alternative options for embedded sensor interface and control designs.

Technical Context

The MSP430G2221IPW14 implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register operations in one MCLK cycle. Its clock system integrates a digitally controlled oscillator (DCO), internal low-frequency oscillator (VLO), and external 32-kHz crystal support - enabling sub-1 µs wake-up from LPM4 and stable timing across 1.8–3.6 V operation.

Peripherals include USI for hardware SPI/I²C communication, Timer_A2 with dual capture/compare channels for PWM and event timing, and digital I/O with individually configurable pull-up/down resistors on all 10 pins. The device lacks ADC10 - confirmed by Table 1 (ADC10 column = "–" for MSP430G2221 variants) and functional block diagrams showing no ADC module.

Key Specifications

Pinout & Package

Package: 14-pin Plastic Small-Outline Thin (TSSOP), PW suffix. Body dimensions: 5.0 mm × 4.4 mm × 1.2 mm, 0.65 mm pitch. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2231IPW14, the MSP430G2221IPW14 removes ADC10 to reduce die size and cost while retaining identical low-power performance and USI capability; versus MSP430FR2111IPW14, it trades FRAM endurance and UART flexibility for proven flash reliability and dedicated USI hardware - making it ideal for fixed-function sensor controllers.

Availability

MSP430G2221IPW14 is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial temperature monitors, smart meter tamper detection systems, and portable medical devices requiring stable component supply and long-term lifecycle assurance.

Supply support for MSP430G2221IPW14 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 decades of expertise in ultra-low-power design.

The MSP430G2xx family was engineered specifically for energy-constrained applications such as battery-operated sensors, utility meters, and portable instrumentation - prioritizing nanowatt-level sleep currents and rapid wake-up responsiveness.

FAQ

Does the MSP430G2221IPW14 include an analog-to-digital converter (ADC)?

No, the MSP430G2221IPW14 does not integrate an ADC. Table 1 in the SLAS694J datasheet explicitly lists "–" under the ADC10 column for all MSP430G2221 variants. This distinguishes it from the MSP430G2231IPW14, which includes a 10-bit ADC10 module. Analog sensing requires external ADC or selection of an ADC-equipped variant.

What is the maximum operating frequency of the MSP430G2221IPW14?

The MSP430G2221IPW14 supports up to 16 MHz MCLK when VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC = 1.8 V, per the Recommended Operating Conditions table. The DCO is factory-calibrated for 1/8/12/16 MHz frequencies, and actual achievable frequency depends on supply voltage and temperature.

Which debug interface does the MSP430G2221IPW14 support?

The MSP430G2221IPW14 supports Spy-Bi-Wire (SBW), a two-wire variant of JTAG, using the RST/NMI/SBWTDIO and TEST/SBWTCK pins. It does not support full 4-wire JTAG. SBW enables programming, debugging, and boundary-scan testing with minimal PCB footprint and pin count.

Can the MSP430G2221IPW14 operate from a 1.8 V supply?

Yes, the MSP430G2221IPW14 is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it supports up to 6 MHz MCLK (duty cycle 50% ±10%), consumes 220 µA in active mode at 1 MHz, and maintains 0.1 µA LPM4 current - making it suitable for single-cell lithium or alkaline battery systems.

What peripherals are included in the MSP430G2221IPW14?

The MSP430G2221IPW14 integrates a 16-bit Timer_A2 with two capture/compare registers, Universal Serial Interface (USI) supporting SPI and I²C, basic clock system with DCO/VLO/LFXT1, brownout detector, watchdog timer+, and 10 general-purpose I/O pins (P1.0–P1.7 and P2.6–P2.7). It excludes ADC10, UART, and comparator modules.