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Texas Instruments MSP430G2221IN14
- Part No.:
- MSP430G2221IN14
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MSP430G2221IN14.pdf
- Description:
- IC MCU 16BIT 2KB FLASH 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,133
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Product details
Overview
MSP430G2221IN14 from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller in 14-pin PDIP package, featuring 2 kB flash, 128 B RAM, 16-bit Timer_A with two capture/compare registers, Universal Serial Interface (USI) for SPI/I²C, and brownout detection. It operates from 1.8 V to 3.6 V and supports five power-saving modes - ideal for battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the MSP430G2221IN14 datasheet, MSP430G2221IN14 pinout, MSP430G2221IN14 application, or MSP430G2221IN14 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options - all grounded in TI's SLAS694J (Feb 2013) specification and device-specific package data.
Technical Context
The MSP430G2221IN14 implements a 16-bit CPU with constant generators and seven addressing modes, executing register-to-register instructions 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.
It includes Port P1 (8-bit I/O with individually configurable pull-up/down resistors and edge-selectable interrupts) and Port P2 (2-bit I/O), plus USI hardware supporting synchronous SPI and I²C protocols without CPU overhead. No ADC10 module is present - distinguishing it from the G2x31 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generators; enables high code efficiency and deterministic 62.5-ns instruction cycle at 16 MHz |
| Memory | 2 kB flash program memory + 128 B RAM; supports in-system programming via Spy-Bi-Wire without external voltage |
| Power Modes | Active mode (220 µA @ 1 MHz, 2.2 V) and five low-power modes - LPM4 draws only 0.1 µA with RAM retention |
| Timer | 16-bit Timer_A2 with two capture/compare registers; supports PWM, interval timing, and input capture on P1.0–P1.2 and P2.6 |
| Communication | Universal Serial Interface (USI) supporting hardware SPI and I²C - reduces firmware overhead for sensor interfacing |
| Supply Range | 1.8 V to 3.6 V operation; flash programming requires ≥2.2 V - ensures compatibility with single-cell Li-ion and dual-cell alkaline systems |
Pinout & Package
Package: 14-pin Plastic Dual Inline Package (PDIP), N suffix per TI ordering nomenclature. Body width 7.62 mm, lead pitch 2.54 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVCC (Pin 1) | Power supply | Main digital supply input; must be decoupled locally with 100 nF ceramic capacitor |
| P1.0/TA0CLK/ACLK (Pin 2) | Multi-function I/O | Timer_A clock input, auxiliary clock output, or general-purpose I/O - selectable via port control registers |
| P1.1/TA0.0 (Pin 3) | Capture/Compare I/O | Timer_A CCI0A input or Out0 output; also serves as general-purpose I/O with interrupt capability |
| P1.2/TA0.1 (Pin 4) | Capture/Compare I/O | Timer_A CCI1A input or Out1 output; shared with P2.6 for TA0.1 output in alternate configuration |
| P1.3 (Pin 5) | General-purpose I/O | Dedicated digital I/O with programmable pull-up/down; no analog function - unlike G2x31 variants |
| P1.4/SMCLK/TCK (Pin 6) | System clock / JTAG | Sub-main clock output or JTAG test clock input; requires TEST pin assertion for JTAG entry |
| P1.5/TA0.0/SCLK/TMS (Pin 7) | Multi-function I/O | Timer_A Out0, USI clock, or JTAG test mode select - function selected by module enable bits |
| P1.6/TA0.1/SDO/SCL/TDI/TCLK (Pin 8) | Multi-function I/O | Timer_A Out1, USI data out, I²C clock, or JTAG test data input - pin role determined by active peripheral |
| P1.7/SDI/SDA/TDO/TDI (Pin 9) | Multi-function I/O | USI data in, I²C data, or JTAG test data I/O - supports bidirectional communication in I²C mode |
| RST/NMI/SBWTDIO (Pin 10) | Reset & debug I/O | Active-low reset input, non-maskable interrupt, or Spy-Bi-Wire data I/O - primary debug interface |
| TEST/SBWTCK (Pin 11) | Debug control | Selects JTAG vs Spy-Bi-Wire mode; required for fuse blowing and programming entry |
| XOUT/P2.7 (Pin 12) | Oscillator output | Crystal oscillator output or general-purpose I/O; must be left unconnected if using internal VLO only |
| XIN/P2.6/TA0.1 (Pin 13) | Oscillator input | Crystal input or Timer_A Out1 output; shares pin with P2.6 - configured via P2SEL register |
| DVSS (Pin 14) | Ground reference | Digital ground return; must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 µA in LPM4 with RAM retention enables multi-year battery life in coin-cell-powered devices |
| Spy-Bi-Wire debug interface | Two-wire in-circuit programming and debugging eliminates need for full 4-pin JTAG header |
| Hardware USI module | Offloads SPI/I²C protocol handling from CPU - critical for deterministic sensor polling in real-time systems |
| Programmable code protection | Security fuse prevents unauthorized flash read-out - essential for firmware IP protection in OEM designs |
| Brownout detector | Prevents erratic operation during power ramp-up/down; resets CPU when VCC drops below threshold |
Applications
| Smart Sensor Node | Portable Data Logger |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting readings via I²C to a central hub. IC Role / Device Role / Timing Role: Primary controller managing sensor acquisition, USI-based I²C communication, and ultra-low-power sleep scheduling. Use Value: 0.1 µA LPM4 current extends CR2032 battery life beyond 5 years while maintaining timestamp accuracy via ACLK from 32-kHz crystal. |
Use Scenario: Handheld environmental monitor logging analog sensor data at fixed intervals to internal flash. IC Role / Device Role / Timing Role: Standalone data acquisition unit using Timer_A to trigger periodic sampling and USI to interface with external EEPROM. Use Value: 2 kB flash stores >10,000 timestamped samples; 220 µA active current at 1 MHz enables fast acquisition without thermal buildup. |
| Industrial Control Panel | Energy Harvesting Endpoint |
Use Scenario: Front-panel controller for HVAC system with pushbutton inputs, LED indicators, and serial bus interface. IC Role / Device Role / Timing Role: Human-interface processor handling debounced button reads, LED PWM via Timer_A outputs, and Modbus RTU over USI-SPI. Use Value: Edge-selectable interrupts on all P1 pins simplify button scanning; 1.8 V minimum supply supports wide-input DC-DC converter output. |
Use Scenario: Solar- or vibration-powered wireless node harvesting energy into supercapacitor and waking periodically to transmit data. IC Role / Device Role / Timing Role: Energy-aware supervisor coordinating charge monitoring, wake timing, and burst-mode RF transmission. Use Value: Sub-1 µs wake-up from LPM4 allows precise duty cycling; brownout detection prevents corruption during capacitor voltage sag. |
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 |
|---|---|---|---|
| MSP430G2231IN14 | Includes 10-bit ADC10 with 8-channel autoscan; identical package, pinout, and USI/Timer_A peripherals | Required where analog sensing (e.g., thermistor, potentiometer) is integrated directly on MCU board | Select when ADC functionality is needed - no PCB change required due to pin compatibility |
| MSP430G2121IN14 | 1 kB flash, no USI module; same 128 B RAM, Timer_A2, and power architecture | Suitable for simpler control tasks without serial communication - e.g., basic timer-driven LED sequencer | Choose for cost-sensitive, non-communication applications where flash size and USI are unnecessary |
Compared with MSP430G2221IN14, the G2231IN14 adds ADC capability without altering footprint or power profile, while the G2121IN14 reduces cost and feature set for minimal-control roles - enabling scalable design across product tiers.
Availability
MSP430G2221IN14 is available at Aetrix Electronics and suitable for smart sensor nodes, portable data loggers, industrial HMI panels, and energy-harvesting endpoints requiring stable component supply and long-term manufacturability.
Supply support for MSP430G2221IN14 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 series targets cost-sensitive, battery-operated measurement and control applications, emphasizing rapid wake-up, minimal active current, and integrated peripherals to reduce BOM count and PCB area.
FAQ
What is the maximum operating frequency of the MSP430G2221IN14?
The MSP430G2221IN14 supports up to 16 MHz MCLK when VCC ≥ 2.7 V, 12 MHz at VCC = 2.2 V, and 6 MHz at VCC = 1.8 V. This DCO-derived frequency drives the CPU and peripherals - with Timer_A and USI operating synchronously to MCLK or SMCLK. The MSP430G2221IN14 does not require external crystals for full-speed operation but can use them for precision timing.
Does the MSP430G2221IN14 include an analog-to-digital converter?
No, the MSP430G2221IN14 does not include an ADC module. Unlike the MSP430G2x31 family (e.g., MSP430G2231IN14), the G2x21 series omits the ADC10 peripheral entirely - as confirmed in Table 1 and functional block diagrams of SLAS694J. Analog signal acquisition requires external ADC or selection of a G2x31 variant.
Which debug interface does the MSP430G2221IN14 support?
The MSP430G2221IN14 supports Spy-Bi-Wire (SBW) via RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). This two-wire interface enables full in-system programming, breakpoint debugging, and memory inspection - eliminating the need for a 4-pin JTAG header and reducing PCB footprint versus legacy JTAG.
Can the MSP430G2221IN14 operate from a single 1.8 V supply?
Yes, the MSP430G2221IN14 is fully specified for operation from 1.8 V to 3.6 V. At 1.8 V, it delivers 6 MHz maximum MCLK, 220 µA active current at 1 MHz, and retains full functionality including Timer_A, USI, and all I/O - making it suitable for single-cell lithium or regulated low-voltage systems.
What is the purpose of the XIN and XOUT pins on the MSP430G2221IN14?
The XIN (Pin 13) and XOUT (Pin 12) pins support connection of a 32768-Hz watch crystal for precise low-frequency timing - enabling accurate real-time clock (RTC) functions and stable ACLK generation. When unused, XIN may serve as P2.6 I/O and XOUT as P2.7 I/O, but crystal operation requires both pins configured as oscillator terminals via BCSCTL3.
MSP430G2221IN14 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- MSP430G2xx
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
MSP430G2221IN14 FAQ
1.How can I place an order for MSP430G2221IN14 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430G2221IN14 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 MSP430G2221IN14 reliable?
The price and inventory of MSP430G2221IN14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430G2221IN14 is usually 5 days.
3.What payment methods are accepted for MSP430G2221IN14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430G2221IN14 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430G2221IN14?
MSP430G2221IN14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430G2221IN14 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 MSP430G2221IN14?
For technical support, including MSP430G2221IN14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430G2221IN14 requirements.
6.How does Aetrix verify that MSP430G2221IN14 is sourced from the original manufacturer or authorized distributors?
All MSP430G2221IN14 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 MSP430G2221IN14 meets industry standards.
7.What is the process for return or replacement of MSP430G2221IN14?
All MSP430G2221IN14 units undergo pre-shipment inspection (PSI). If there is an issue with MSP430G2221IN14, 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 MSP430G2221IN14 part is unused and in its original packaging.
Return procedure for MSP430G2221IN14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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