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Texas Instruments MSP430F1222IDW

Name: MSP430F1222IDW
Brand: Texas Instruments
SKU: MSP430F1222IDW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430F1222IDW

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: MSP430F1222IDW.pdf

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

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Product details

Overview

MSP430F1222IDW 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 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, enabling battery-powered sensor nodes and portable measurement systems.

For engineers reviewing the MSP430F1222IDW datasheet, MSP430F1222IDW pinout, MSP430F1222IDW application, or MSP430F1222IDW equivalent, key selection criteria include its 28-pin TSSOP/SOWB package, integrated DCO wake-up in <6 µs, brownout protection, programmable code security fuse, and dual analog input capability (A0–A7) with internal reference and DTC.

Technical Context

The MSP430F1222IDW implements a 16-bit RISC CPU with constant generators and seven addressing modes, delivering 125 ns instruction cycle time. Its basic clock module supports multiple sources: internal DCO, 32-kHz crystal, high-frequency crystal, resonator, or external clock - all configurable via BCSCTL1/2 and DCOCTL registers.

It integrates three peripheral domains: 10-bit ADC10 with autoscan, sample-and-hold, and data transfer controller (DTC); Timer_A3 with independent capture/compare channels on P1.x and P2.x pins; and USART0 (exclusive to x12x2 family) with double-buffered UART/SPI operation enabled via U0CTL, U0TCTL, and U0RCTL registers.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPU with 16 general-purpose registers and constant generators for optimized code density and execution efficiency
Memory	4KB + 256B Flash program memory and 256B RAM - sufficient for standalone firmware with ADC data logging and serial protocol stacks
ADC Resolution & Speed	10-bit SAR ADC with 200-ksps sampling rate, internal reference, and DTC - enables autonomous sensor acquisition without CPU intervention
Power Modes	Five low-power modes including LPM4 (0.1 µA RAM retention) - extends battery life in intermittently active sensing applications
Wake-Up Time	<6 µs from standby to active mode via DCO - meets real-time response requirements in event-triggered systems
Communication Interface	USART0 supporting software-selectable UART (asynchronous) or SPI (synchronous) - provides flexible host connectivity with minimal pin count
Analog Inputs	Eight-channel analog input (A0–A7), including dedicated VREF+/VREF− terminals - supports multi-sensor signal conditioning with shared reference

Pinout & Package

Package: 28-pin plastic TSSOP (PW) or SOWB (DW). Pinout corresponds to MSP430x12x2 family; DW and PW share identical terminal mapping per datasheet SLAS361D.

Pin/Terminal	Circuit Role	Design Meaning
P1.0/TACLK/ADC10CLK	Timer_A clock input / ADC conversion clock	Enables synchronous timing control for both timer events and ADC sampling; selectable as external or internal source
P1.1–P1.7	General I/O with Timer_A capture/compare functions	Supports PWM generation, pulse-width measurement, and JTAG test interface (TDI/TDO/TCK/TMS) on shared pins
P2.0/ACLK/A0 – P2.4/VREF+/A4	ACLK output / analog inputs A0–A4 / reference voltage I/O	Provides low-jitter auxiliary clock and up to five ADC channels with dedicated reference path for precision measurements
P2.5/ROSC	DCO resistor input	Connects external resistor to calibrate nominal DCO frequency - critical for fast wake-up timing accuracy without crystal
P3.0–P3.7	USART0 signals (STE0, SIMO0, SOMI0, UCLK0, UTXD0, URXD0) and analog inputs A5–A7	Enables full-duplex serial communication and adds three additional ADC channels - expands sensor interface without external mux
RST/NMI	Reset or nonmaskable interrupt input	Hardware reset initiation and fault-handling entry point; supports watchdog timeout and oscillator fault detection
XIN/XOUT	Crystal oscillator input/output	Supports 32-kHz watch crystal for RTC or high-frequency crystal for precise system timing - selectable via BCSCTL1
VCC/VSS	Supply and ground	Operates across 1.8–3.6 V range; VSS must connect to QFN power pad (if used) and all NC/reserved pins to minimize leakage current

Key Features

Feature	Design Value
Ultralow-power operation	0.1 µA off-mode current with RAM retention enables multi-year coin-cell battery life in sleep-dominated applications
Digital-controlled oscillator (DCO)	Stabilizes in <6 µs - eliminates crystal startup delay and supports rapid event-response wake-up from LPM3/LPM4
Integrated 10-bit ADC with DTC	Automatically sequences conversions across A0–A7 and stores results to RAM - removes polling/interrupt overhead during burst sampling
Programmable code protection	Security fuse prevents unauthorized read-out of Flash contents - protects proprietary firmware and calibration data
Supply voltage brownout protection	Generates internal reset below safe VCC threshold - ensures reliable initialization and prevents erratic behavior during battery sag
Serial onboard programming	UART-based BSL requires no external programming voltage - simplifies field firmware updates using only P1.1/P2.2 pins

Applications

Wireless Sensor Node	Portable Medical Monitor
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data at 10-second intervals, transmitting via UART to BLE gateway. IC Role / Device Role / Timing Role: Central MCU managing ADC sampling, DTC-driven data buffering, USART0 UART transmission, and ultra-low-power sleep scheduling. Use Value: 0.1 µA LPM4 current and <6 µs wake-up enable >5-year CR2032 battery life while maintaining sub-second responsiveness to motion triggers.	Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, performing real-time SpO₂ calculation, and displaying results on LCD. IC Role / Device Role / Timing Role: Signal acquisition MCU with simultaneous 10-bit ADC sampling on A0–A3, internal reference stability, and SMCLK-synchronized processing. Use Value: Integrated VREF+/VREF− and autoscan ADC eliminate external reference IC and reduce BOM cost by $0.35 while maintaining ±1% measurement accuracy.
Industrial Data Logger	Smart Utility Meter Sensor Interface
Use Scenario: DIN-rail mounted logger recording voltage, current, and temperature from industrial sensors every minute, storing to Flash, and uploading via RS-232. IC Role / Device Role / Timing Role: Standalone data acquisition controller using Timer_A3 for precise interval timing, Flash for nonvolatile storage, and USART0 UART for host communication. Use Value: 4KB Flash and 256B RAM support firmware + 24-hour timestamped log buffer; brownout protection prevents corruption during AC line dips.	Use Scenario: Sub-metering module interfacing with shunt-based current sensors and thermistors in electricity/water meters, communicating via UART to main processor. IC Role / Device Role / Timing Role: Dedicated analog front-end controller performing synchronized multi-channel ADC reads, gain calibration, and UART packet framing. Use Value: Eight ADC inputs (A0–A7) and DTC allow concurrent sampling of 4 differential pairs - reduces external mux count and improves channel-to-channel timing alignment.

Wireless Sensor Node

Portable Medical Monitor

Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data at 10-second intervals, transmitting via UART to BLE gateway.

IC Role / Device Role / Timing Role: Central MCU managing ADC sampling, DTC-driven data buffering, USART0 UART transmission, and ultra-low-power sleep scheduling.

Use Value: 0.1 µA LPM4 current and <6 µs wake-up enable >5-year CR2032 battery life while maintaining sub-second responsiveness to motion triggers.

Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals, performing real-time SpO₂ calculation, and displaying results on LCD.

IC Role / Device Role / Timing Role: Signal acquisition MCU with simultaneous 10-bit ADC sampling on A0–A3, internal reference stability, and SMCLK-synchronized processing.

Use Value: Integrated VREF+/VREF− and autoscan ADC eliminate external reference IC and reduce BOM cost by $0.35 while maintaining ±1% measurement accuracy.

Industrial Data Logger

Smart Utility Meter Sensor Interface

Use Scenario: DIN-rail mounted logger recording voltage, current, and temperature from industrial sensors every minute, storing to Flash, and uploading via RS-232.

IC Role / Device Role / Timing Role: Standalone data acquisition controller using Timer_A3 for precise interval timing, Flash for nonvolatile storage, and USART0 UART for host communication.

Use Value: 4KB Flash and 256B RAM support firmware + 24-hour timestamped log buffer; brownout protection prevents corruption during AC line dips.

Use Scenario: Sub-metering module interfacing with shunt-based current sensors and thermistors in electricity/water meters, communicating via UART to main processor.

IC Role / Device Role / Timing Role: Dedicated analog front-end controller performing synchronized multi-channel ADC reads, gain calibration, and UART packet framing.

Use Value: Eight ADC inputs (A0–A7) and DTC allow concurrent sampling of 4 differential pairs - reduces external mux count and improves channel-to-channel timing alignment.

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
MSP430F1232IDW	8KB Flash, same RAM, peripherals, and package - no change in power profile or pinout	Required when firmware exceeds 4KB or future expansion headroom is needed	Select MSP430F1232IDW if code size approaches 3.5KB or bootloader + application + calibration data require >4KB total
MSP430F2274IRHBT	16KB Flash, 1KB RAM, enhanced USCI module (UART/SPI/I²C), 1.8–3.6 V supply, but 32-pin QFN only	Supports I²C sensor networks and larger algorithmic workloads; lacks direct pin compatibility	Choose MSP430F2274IRHBT only when migrating to I²C peripherals or requiring >4KB code space and accepting PCB redesign

Compared with MSP430F1222IDW, MSP430F1232IDW offers immediate Flash scalability without layout changes, while MSP430F2274IRHBT introduces I²C and larger memory at the cost of package incompatibility and higher minimum order quantities.

Availability

MSP430F1222IDW 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 traceable sourcing.

Supply support for MSP430F1222IDW 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 over 50 years of innovation in low-power design.

The MSP430x12x2 product line was engineered for ultralow-power portable measurement applications, integrating precision analog, efficient 16-bit processing, and intelligent power management in compact packages.

FAQ

What is the maximum operating frequency of the MSP430F1222IDW?

The MSP430F1222IDW does not specify a maximum system clock frequency in absolute terms; its DCO and crystal-supported clocks operate within the constraints of the basic clock module. The 125 ns instruction cycle time implies effective throughput at ~8 MHz, but actual MCLK is typically limited to 1–2 MHz in battery-powered designs to maintain ultralow-power operation. The device's architecture prioritizes energy efficiency over raw speed - confirmed by active-mode current of 200 µA at 1 MHz/2.2 V in the SLAS361D datasheet. MSP430F1222IDW performance is optimized for sub-MHz deterministic real-time tasks.

Does the MSP430F1222IDW support I²C communication?

No, the MSP430F1222IDW does not support I²C. Its sole serial peripheral is USART0, which implements only UART (asynchronous) and SPI (synchronous) protocols - explicitly stated in the "MSP430x12x2 Family Members" section and functional block diagram of SLAS361D. I²C capability appears in later MSP430 generations (e.g., USCI modules in F2xx/F5xx families), but MSP430F1222IDW lacks hardware I²C logic, dedicated I²C pins, or register-level I²C control. For I²C sensor integration, external bit-banged GPIO or a companion level-shifter IC would be required - neither supported natively by MSP430F1222IDW.

What package options are available for the MSP430F1222IDW?

The MSP430F1222IDW is offered exclusively in 28-pin plastic packages: TSSOP (PW) and SOWB (DW), as confirmed in the "AVAILABLE OPTIONS" table of SLAS361D. It is not available in QFN (RHB) - that package is designated for MSP430F1222IRHB, a distinct orderable part. The "IDW" suffix specifically denotes the 28-pin industrial-temperature (−40°C to 85°C) TSSOP/SOWB variant. No SOIC, QFP, or BGA variants exist for this part number. Board layout must accommodate either 28-pin TSSOP (body width 4.4 mm) or 28-pin SOWB (body width 7.8 mm) footprints.

How many analog input channels does the MSP430F1222IDW support?

The MSP430F1222IDW supports eight analog input channels: A0 through A7. Channels A0–A4 map to P2.0, P2.1, P2.2, P2.3, and P2.4 respectively; A5–A7 map to P3.0, P3.6, and P3.7. This is verified in the "Terminal Functions, MSP430x12x2" table (page 6) and functional block diagram (page 4) of SLAS361D. All eight channels are accessible simultaneously via ADC10's autoscan mode and can be assigned to the internal 1.5-V or 2.5-V reference or external VREF+/VREF−. No external multiplexer is required to access the full set - each channel connects directly to dedicated pins on the MSP430F1222IDW.

Is the MSP430F1222IDW pin-compatible with the MSP430F1122IDW?

No, the MSP430F1222IDW is not pin-compatible with the MSP430F1122IDW. Although both use "IDW" suffix and 20-/28-pin packages, they belong to different families (x12x2 vs. x11x2) with distinct pinouts: MSP430F1122IDW is 20-pin (SOWB/TSSOP), while MSP430F1222IDW is 28-pin. Even comparing their respective 28-pin and 20-pin variants, port assignments differ - e.g., P3.x signals (USART0, A5–A7) exist only on x12x2 devices and have no counterpart on x11x2. The datasheet explicitly separates them into "MSP430x11x2 Family Members" and "MSP430x12x2 Family Members", confirming incompatible pin mappings and peripheral sets. MSP430F1222IDW requires a unique PCB layout.

MSP430F1222IDW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 28-SOIC (0.295", 7.50mm 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:

MSP430F1222IDW FAQ

1.How can I place an order for MSP430F1222IDW through Aetrix?

Please submit a Request for Quotation (RFQ) for MSP430F1222IDW 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 MSP430F1222IDW reliable?

The price and inventory of MSP430F1222IDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F1222IDW is usually 5 days.

3.What payment methods are accepted for MSP430F1222IDW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F1222IDW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MSP430F1222IDW?

MSP430F1222IDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MSP430F1222IDW 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 MSP430F1222IDW?

For technical support, including MSP430F1222IDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F1222IDW requirements.

6.How does Aetrix verify that MSP430F1222IDW is sourced from the original manufacturer or authorized distributors?

All MSP430F1222IDW 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 MSP430F1222IDW meets industry standards.

7.What is the process for return or replacement of MSP430F1222IDW?

All MSP430F1222IDW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F1222IDW, 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 MSP430F1222IDW part is unused and in its original packaging.

Return procedure for MSP430F1222IDW:

1.Submit a request within 90 days.

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

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