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Texas Instruments MSP430G2221IRSA16T
- Part No.:
- MSP430G2221IRSA16T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MSP430G2221IRSA16T.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:720
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Product details
Overview
MSP430G2221IRSA16T 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, brownout detection, and five power-saving modes. It operates from 1.8 V to 3.6 V and supports active-mode current of 220 µA at 1 MHz/2.2 V - optimized for battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430G2221IRSA16T datasheet, MSP430G2221IRSA16T pinout, MSP430G2221IRSA16T application, or MSP430G2221IRSA16T equivalent, key selection criteria include its QFN-16 package, Spy-Bi-Wire debug interface, USI supporting SPI/I²C, 10-pin I/O capability, and verified LPM4 current of 0.1 µA - all critical for energy-constrained embedded designs.
Technical Context
The MSP430G2221IRSA16T implements a 16-bit CPU with constant generators and seven addressing modes, enabling single-cycle register operations. 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 standby mode.
It uses a unified peripheral bus architecture where Timer_A2, USI, and digital I/O are memory-mapped and accessible via all instructions. Port P1 provides eight programmable I/O pins with individually configurable pull-up/down resistors and edge-selectable interrupts; Port P2 adds two more I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 51-instruction set - enables efficient code density and deterministic timing for real-time control. |
| Memory | 2 kB flash (main memory) + 256 B information memory + 128 B RAM - sufficient for firmware, calibration data, and runtime variables in compact sensor firmware. |
| Supply Voltage | 1.8 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, or dual-AA alkaline battery systems without regulation. |
| Ultra-Low Power | LPM4 current = 0.1 µA (RAM retention); active mode = 220 µA @ 1 MHz/2.2 V - extends multi-year operation on coin cells. |
| Timer & Interface | 16-bit Timer_A2 with two capture/compare registers + Universal Serial Interface (USI) for SPI/I²C - supports PWM generation and sensor communication without external ICs. |
| Debug | Spy-Bi-Wire interface (2-wire JTAG) - enables in-system programming and debugging using minimal PCB footprint and no external voltage. |
| Operating Temperature | –40°C to +85°C (I version) - qualified for industrial and outdoor environmental monitoring deployments. |
Pinout & Package
Package: 16-pin QFN (RSA), 3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad recommended to be connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pins 15, 16) | Power supply | Primary VDD input; must be decoupled locally with 100 nF ceramic capacitor per DVCC pin. |
| DVSS (Pins 13, 14) | Ground reference | Digital ground return; thermal pad must also connect to DVSS for thermal and EMI performance. |
| P1.0/TA0CLK/ACLK/A0 | Multi-function I/O | Configurable as timer clock input, ACLK output, or ADC channel 0 - enables flexible clock tree or analog sensing routing. |
| P1.6/TA0.1/SDO/SCL/TDI/TCLK | Shared peripheral pin | Supports Timer_A compare output, SPI data out, I²C clock, or JTAG test input - requires careful mode selection during initialization. |
| RST/NMI/SBWTDIO | Reset & debug I/O | Active-low reset input, non-maskable interrupt, and bidirectional Spy-Bi-Wire data - shared function simplifies debug connector footprint. |
| TEST/SBWTCK | Debug clock input | Enables Spy-Bi-Wire programming when pulled high; tied low disables JTAG fuse access - critical for secure production programming. |
Key Features
| Feature | Design Value |
|---|---|
| Five power-saving modes (LPM0–LPM4) | Enables dynamic power scaling: LPM4 draws only 0.1 µA with RAM retention - ideal for wake-on-event sensor sleep cycles. |
| Brownout detector | Prevents erratic operation during battery droop by asserting reset below programmable threshold - eliminates need for external supervisor IC. |
| On-chip DCO with factory calibration | Provides 1/8/12/16 MHz clock options without external crystal - reduces BOM count and board space in cost-sensitive designs. |
| Programmable code protection | Security fuse prevents unauthorized flash read-out - protects proprietary firmware in deployed edge devices. |
| USI module (SPI/I²C) | Hardware-accelerated serial communication with automatic clock/data handling - offloads CPU during sensor data acquisition. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity node transmitting data via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, USI-driven RF interface, and LPM3/LPM4 sleep scheduling. Use Value: 0.7 µA LPM3 current with 32-kHz ACLK enables >5-year battery life on CR2032; Spy-Bi-Wire allows field firmware updates. |
Use Scenario: Handheld pulse oximeter acquiring analog photodiode signals and driving OLED display. IC Role / Device Role / Timing Role: Signal processor executing real-time SpO₂ algorithm, controlling LED drivers via Timer_A PWM, and managing display refresh. Use Value: Integrated 10-bit ADC with sample-and-hold and autoscan eliminates external signal chain components; 220 µA active current ensures long clinical use per charge. |
| Smart Utility Meter | Industrial Condition Monitor |
|
Use Scenario: Tamper-resistant electricity meter logging voltage/current waveforms and communicating via PLC or NB-IoT. IC Role / Device Role / Timing Role: Secure data acquisition engine with brownout detection, flash-based firmware storage, and encrypted USI communication to modem. Use Value: Factory-calibrated DCO ensures accurate timekeeping for billing intervals; programmable code protection prevents firmware tampering. |
Use Scenario: Vibration sensor mounted on motor housing, detecting bearing faults via FFT analysis of accelerometer data. IC Role / Device Role / Timing Role: Edge preprocessing unit performing windowed sampling, RMS calculation, and event-triggered wake-up via P1.x interrupts. Use Value: Sub-1-µs wake-up from LPM4 enables immediate response to impact events; 16-bit Timer_A supports precise timestamping of anomalies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430G2231IRSA16 | Includes 10-bit ADC10 with 8-channel autoscan; same package, flash/RAM, and peripherals otherwise identical. | Required when analog sensor interfacing (e.g., thermistor arrays, multi-channel voltage monitoring) is needed. | Select MSP430G2231IRSA16 if ADC functionality is required; MSP430G2221IRSA16 is optimal when ADC is unnecessary and lowest BOM cost is prioritized. |
| MSP430FR2111IPW14 | Ferroelectric RAM (FRAM) instead of flash; 1.5 kB FRAM + 512 B RAM; TSSOP-14 package; higher max frequency (16 MHz). | Superior write endurance and faster write speed benefit data-logging or frequent configuration updates. | Choose MSP430FR2111IPW14 for applications requiring frequent nonvolatile writes; MSP430G2221IRSA16 remains preferred for pure cost- and power-optimized sensor endpoints. |
Compared with MSP430G2231IRSA16 and MSP430FR2111IPW14, the MSP430G2221IRSA16 delivers the lowest active and standby power among QFN-packaged G-series MCUs without ADC or FRAM overhead - making it the most efficient choice for simple control and communication tasks in energy-constrained systems.
Availability
MSP430G2221IRSA16T is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, and smart utility meters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MSP430G2221IRSA16T 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 targets cost-sensitive, battery-operated applications such as sensor interfaces and portable instrumentation - emphasizing minimal power consumption, integrated peripherals, and ease of development.
FAQ
What is the maximum operating frequency of the MSP430G2221IRSA16T?
The MSP430G2221IRSA16T supports a maximum MCLK frequency of 16 MHz at VCC ≥ 3.3 V, 12 MHz at VCC ≥ 2.7 V, and 6 MHz at VCC ≥ 1.8 V. This is governed by the DCO's calibrated settings and voltage-dependent timing margins - all verified in the SLAS694J datasheet's Recommended Operating Conditions table.
Does the MSP430G2221IRSA16T include an analog-to-digital converter (ADC)?
No, the MSP430G2221IRSA16T does not include an ADC. It belongs to the G2x21 subfamily, which omits the ADC10 module present in the G2x31 series (e.g., MSP430G2231IRSA16). This distinction is explicitly confirmed in Table 1 of the SLAS694J datasheet under the "ADC10 Channel" column, where MSP430G2221IRSA16 shows a dash (–).
What debug interface does the MSP430G2221IRSA16T support?
The MSP430G2221IRSA16T supports the Spy-Bi-Wire (SBW) interface using two pins: TEST/SBWTCK and RST/NMI/SBWTDIO. This 2-wire variant of JTAG enables full in-system programming and debugging without requiring a 4-pin JTAG header - reducing PCB layout complexity and connector cost.
What are the power supply requirements for programming the MSP430G2221IRSA16T flash memory?
Flash programming for the MSP430G2221IRSA16T requires a minimum VCC of 2.2 V, per the Recommended Operating Conditions table in SLAS694J. Programming at lower voltages may result in incomplete or corrupted flash writes - this constraint applies regardless of whether programming is performed via Spy-Bi-Wire or in-application firmware routines.
Is the MSP430G2221IRSA16T pin-compatible with other devices in the MSP430G2xx family?
The MSP430G2221IRSA16T shares the same 16-pin QFN (RSA) package footprint and pin assignments with MSP430G2231IRSA16, MSP430G2121IRSA16, and MSP430G2131IRSA16. However, functional differences - such as presence/absence of ADC10 or USI configuration - require firmware validation even when hardware layout is reused.
MSP430G2221IRSA16T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-VQFN Exposed Pad
- Series:
- MSP430G2xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 10
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430G2221IRSA16T FAQ
1.How can I place an order for MSP430G2221IRSA16T through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2221IRSA16T 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 MSP430G2221IRSA16T reliable?
The price and inventory of MSP430G2221IRSA16T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2221IRSA16T is usually 5 days.
3.What payment methods are accepted for MSP430G2221IRSA16T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2221IRSA16T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2221IRSA16T?
MSP430G2221IRSA16T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2221IRSA16T 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 MSP430G2221IRSA16T?
For technical support, including MSP430G2221IRSA16T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2221IRSA16T requirements.
6.How does Aetrix verify that MSP430G2221IRSA16T is sourced from the original manufacturer or authorized distributors?
All MSP430G2221IRSA16T 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 MSP430G2221IRSA16T meets industry standards.
7.What is the process for return or replacement of MSP430G2221IRSA16T?
All MSP430G2221IRSA16T units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2221IRSA16T, 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 MSP430G2221IRSA16T part is unused and in its original packaging.
Return procedure for MSP430G2221IRSA16T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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