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Texas Instruments MSP430F1222IPW

Name: MSP430F1222IPW
Brand: Texas Instruments
SKU: MSP430F1222IPW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430F1222IPW

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 28-TSSOP (0.173", 4.40mm Width)

Datasheet:: MSP430F1222IPW.pdf

Description:: IC MCU 16BIT 4KB FLASH 28TSSOP

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Product details

Overview

MSP430F1222IPW from Texas Instruments is an ultralow-power 16-bit RISC microcontroller with 4KB Flash, 256B RAM, 10-bit ADC, Timer_A3 with three capture/compare registers, and integrated USART0 supporting UART/SPI modes. It operates from 1.8 V to 3.6 V and achieves active-mode current of 200 µA at 1 MHz/2.2 V - ideal for battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1222IPW datasheet, MSP430F1222IPW pinout, MSP430F1222IPW application, or MSP430F1222IPW equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in SLAS361D (Rev. August 2004) and TI's official MSP430x12x2 family documentation.

Technical Context

The MSP430F1222IPW implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal support, and selectable internal resistors - delivering sub-6 µs wake-up from standby mode.

It features three independent I/O ports (P1, P2, P3), with P3 providing eight dedicated pins for USART0 (UTXD0/URXD0/UCLK0/SIMO0/SOMI0/STE0) and additional analog inputs (A5–A7). The ADC10 includes internal reference, sample-and-hold, autoscan, and data transfer controller (DTC) for autonomous conversion sequencing without CPU intervention.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 125 ns instruction cycle time and seven addressing modes - enables efficient code execution and compact firmware footprint.
Memory	4KB + 256B Flash program memory and 256B RAM - supports moderate firmware complexity with nonvolatile storage for calibration data.
ADC	10-bit SAR ADC with 200 ksps sampling rate, internal reference, autoscan, and DTC - allows continuous multi-channel sensing without CPU polling.
Power Modes	Five low-power modes including LPM4 (0.1 µA RAM retention) - extends battery life in intermittent-sensing applications like environmental monitors.
Communication	USART0 with software-selectable UART or SPI interface - enables direct connection to Bluetooth modules, RF transceivers, or host MCUs without external level shifters.
Timer System	16-bit Timer_A3 with three capture/compare registers and interrupt-capable CCR0/CCR1/CCR2 - supports PWM generation, input capture for pulse-width measurement, and precise timing intervals.
Supply Range	1.8 V to 3.6 V operation - compatible with single-cell Li-ion, Li-polymer, or dual-AA alkaline power sources without regulation overhead.

Pinout & Package

Package: 28-pin Plastic TSSOP (PW), 0.65 mm pitch, body size 9.7 × 4.4 mm. Pin 1 marked by dot; exposed thermal pad recommended to be connected to VSS.

Pin/Terminal	Circuit Role	Design Meaning
P1.0/TACLK/ADC10CLK	Timer_A clock input / ADC conversion clock	Accepts external timing source for synchronous sampling or drives ADC clock independently of system clocks.
P1.4/SMCLK/TCK	Sub-main clock output / JTAG test clock	Provides SMCLK signal for peripheral synchronization; doubles as TCK during programming/debug via Spy-Bi-Wire.
P2.3/TA1/A3/VREF−/VeREF−	Analog input / Timer_A1 input / ADC negative reference	Supports differential ADC measurements when paired with P2.4; enables ratiometric sensing with external sensors.
P3.4/UTXD0	USART0 transmit data output	Drives UART TX line directly - no pull-up required; compatible with 3.3 V logic-level peripherals and RS-232 transceivers.
P3.5/URXD0	USART0 receive data input	Accepts asynchronous serial data; internal Schmitt trigger ensures noise immunity on long traces or noisy environments.
RST/NMI	Reset or non-maskable interrupt input	Active-low pin that resets CPU and peripherals; also serves as NMI source for critical fault handling (e.g., voltage brownout).
VCC / VSS	Power supply / ground	Dual VCC/VSS pairs (pins 2/30 and 4/1) reduce supply impedance and improve noise rejection in mixed-signal operation.

Key Features

Feature	Design Value
Ultralow-power operation	0.1 µA off-mode current with RAM retention enables >10-year battery life in coin-cell-powered IoT endpoints.
Integrated USART0	Hardware UART/SPI eliminates need for external communication ICs - reduces BOM count and PCB area in sensor-to-gateway designs.
ADC10 with DTC	Autonomous 10-bit conversion across up to eight channels (A0–A7) stores results directly to RAM - frees CPU for real-time processing.
Programmable code protection	Security fuse prevents unauthorized read-out of Flash contents - protects proprietary algorithms in field-deployed devices.
Supply voltage brownout protection	On-chip POR/BOR circuit ensures reliable reset below 1.7 V - prevents erratic behavior during battery discharge or cold-start conditions.

Applications

Wireless Sensor Node	Portable Medical Monitor
Use Scenario: Battery-powered temperature/humidity node transmitting data via BLE or Sub-GHz radio every 5 minutes. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, ADC sequencing, low-power sleep/wake cycles, and UART-based packet framing for radio interface. Use Value: Sub-µA standby current and 6 µs wake-up minimize energy per measurement cycle, extending CR2032 life beyond 2 years.	Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and computing SpO₂ in real time. IC Role / Device Role / Timing Role: Signal acquisition controller running ADC10 autoscan on A0–A3, applying digital filtering via CPU, and driving OLED display via SPI. Use Value: Integrated 10-bit ADC with internal reference and DTC enables synchronized dual-wavelength sampling without external precision references or DMA controllers.
Industrial Data Logger	Smart Meter Sensor Interface
Use Scenario: DIN-rail mounted logger recording thermocouple and RTD readings hourly over 10-year deployment. IC Role / Device Role / Timing Role: Precision analog front-end manager using Timer_A3 for periodic sampling triggers and USART0 for Modbus RTU communication. Use Value: Programmable gain and reference selection across A0–A7 allow direct connection to multiple sensor types without external signal conditioning.	Use Scenario: Electricity meter auxiliary board measuring neutral current and tamper detection signals. IC Role / Device Role / Timing Role: Secondary controller interfacing isolated current sensors via P3.6/A6 and P3.7/A7, performing RMS calculation, and reporting via UART to main MCU. Use Value: Independent VREF+/VREF− pins enable high-accuracy ratiometric measurements referenced to shunt voltage - critical for metrology-grade accuracy.

Wireless Sensor Node

Portable Medical Monitor

Use Scenario: Battery-powered temperature/humidity node transmitting data via BLE or Sub-GHz radio every 5 minutes.

IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, ADC sequencing, low-power sleep/wake cycles, and UART-based packet framing for radio interface.

Use Value: Sub-µA standby current and 6 µs wake-up minimize energy per measurement cycle, extending CR2032 life beyond 2 years.

Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and computing SpO₂ in real time.

IC Role / Device Role / Timing Role: Signal acquisition controller running ADC10 autoscan on A0–A3, applying digital filtering via CPU, and driving OLED display via SPI.

Use Value: Integrated 10-bit ADC with internal reference and DTC enables synchronized dual-wavelength sampling without external precision references or DMA controllers.

Industrial Data Logger

Smart Meter Sensor Interface

Use Scenario: DIN-rail mounted logger recording thermocouple and RTD readings hourly over 10-year deployment.

IC Role / Device Role / Timing Role: Precision analog front-end manager using Timer_A3 for periodic sampling triggers and USART0 for Modbus RTU communication.

Use Value: Programmable gain and reference selection across A0–A7 allow direct connection to multiple sensor types without external signal conditioning.

Use Scenario: Electricity meter auxiliary board measuring neutral current and tamper detection signals.

IC Role / Device Role / Timing Role: Secondary controller interfacing isolated current sensors via P3.6/A6 and P3.7/A7, performing RMS calculation, and reporting via UART to main MCU.

Use Value: Independent VREF+/VREF− pins enable high-accuracy ratiometric measurements referenced to shunt voltage - critical for metrology-grade accuracy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430F1232IPW	8KB Flash, same RAM, peripherals, and pinout - no hardware or layout change required.	Required for larger firmware (e.g., embedded TLS stack or advanced sensor fusion).	Select when firmware exceeds 4KB or future scalability is needed; identical power profile and timing behavior.
MSP430G2553IPW28	16KB Flash, 512B RAM, enhanced USCI (UART/SPI/I²C), but no integrated DCO calibration or brownout protection.	Suitable for cost-sensitive designs where extended temperature range or legacy toolchain support is prioritized.	Choose only if migrating from older G-series toolchains; requires validation of brownout resilience and clock stability in field conditions.

Compared with MSP430F1222IPW, the F1232IPW offers seamless Flash expansion without altering power budget or PCB layout, while the G2553IPW28 trades robustness for higher memory and broader interface support - making it appropriate only when those features outweigh reliability requirements.

Availability

MSP430F1222IPW is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for MSP430F1222IPW 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 ultralow-power design and industrial-grade reliability.

The MSP430x12x2 product line was engineered specifically for battery-operated measurement applications demanding nanowatt-level power management, integrated analog peripherals, and rapid wake-up response - targeting portable instrumentation, sensor networks, and energy-harvesting systems.

FAQ

What is the maximum operating frequency of the MSP430F1222IPW?

The MSP430F1222IPW supports a maximum CPU clock frequency of 8 MHz via the DCO or external crystal. Its 125 ns instruction cycle time corresponds to 8 MHz operation, though typical active-mode use at 1 MHz balances performance and ultralow power (200 µA @ 1 MHz/2.2 V). External high-frequency crystals up to 8 MHz are supported through the basic clock module.

Does the MSP430F1222IPW support in-system programming without external voltage?

Yes, the MSP430F1222IPW supports serial onboard programming via its built-in bootstrap loader (BSL), requiring only a UART interface and no external programming voltage. The BSL uses P1.1 (TXD) and P2.2 (RXD) pins in the TSSOP package and is protected by a user-configurable password stored in information memory - enabling secure field firmware updates.

How many analog input channels does the MSP430F1222IPW ADC support?

The MSP430F1222IPW ADC10 module supports eight analog input channels: A0 through A7. These map to physical pins P2.0, P2.1, P2.2, P2.3, P2.4, P3.0, P3.6, and P3.7. The autoscan feature allows automatic sequential conversion across any subset of these channels, with results stored directly to memory via the data transfer controller (DTC).

Is the MSP430F1222IPW pin-compatible with other MSP430x12x2 variants in TSSOP packages?

Yes, the MSP430F1222IPW is fully pin-compatible with MSP430F1232IPW in the 28-pin TSSOP (PW) package - sharing identical pin functions, electrical characteristics, and footprint. This allows direct replacement for Flash capacity upgrades without PCB revision or firmware changes.

What communication protocols does the USART0 peripheral support on the MSP430F1222IPW?

The USART0 peripheral on the MSP430F1222IPW supports both asynchronous UART and synchronous SPI protocols, selected in software. In UART mode, it uses P3.4 (UTXD0) and P3.5 (URXD0); in SPI mode, it uses P3.1 (SIMO0), P3.2 (SOMI0), P3.3 (UCLK0), and P3.0 (STE0) - enabling flexible integration with radios, displays, and sensor hubs.

MSP430F1222IPW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 28-TSSOP (0.173", 4.40mm Width)

Series:: MSP430x1xx

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Core Processor:: MSP430 CPU16

Core Size:: 16-Bit

Speed:: 8MHz

Connectivity:: SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 22

Program Memory Size:: 4KB (4K x 8 + 256B)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 256 x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 8x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430F1222IPW FAQ

1.How can I place an order for MSP430F1222IPW through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430F1222IPW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MSP430F1222IPW reliable?

The price and inventory of MSP430F1222IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1222IPW is usually 5 days.

3.What payment methods are accepted for MSP430F1222IPW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1222IPW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430F1222IPW?

MSP430F1222IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430F1222IPW order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MSP430F1222IPW?

For technical support, including MSP430F1222IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1222IPW requirements.

6.How does Aetrix verify that MSP430F1222IPW is sourced from the original manufacturer or authorized distributors?

All MSP430F1222IPW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430F1222IPW meets industry standards.

7.What is the process for return or replacement of MSP430F1222IPW?

All MSP430F1222IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1222IPW, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MSP430F1222IPW part is unused and in its original packaging.

Return procedure for MSP430F1222IPW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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