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Texas Instruments MSP430F2121TRGET
- Part No.:
- MSP430F2121TRGET
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MSP430F2121TRGET.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
MSP430F2121TRGET from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 4KB flash, 256B RAM, a 16-bit Timer_A with three capture/compare registers, an on-chip analog comparator for slope A/D conversion, and support for 1.8–3.6 V operation - deployed in battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F2121TRGET datasheet, MSP430F2121TRGET pinout, MSP430F2121TRGET application, or MSP430F2121TRGET equivalent, key selection criteria include active-mode current at 1 MHz (250 µA @ 2.2 V), sub-1 µs wake-up from standby, integrated DCO with factory-calibrated frequencies up to 16 MHz, and JTAG + BSL programming support.
Technical Context
The MSP430F2121TRGET implements a 16-bit RISC CPU with constant generators and seven addressing modes, enabling single-cycle register operations and high code efficiency. Its basic clock module integrates a digitally controlled oscillator (DCO), 32-kHz crystal input (XIN/XOUT), and high-frequency crystal support up to 16 MHz - all configurable via BCSCTL registers.
Power management is handled through six operating modes (AM, LPM0–LPM4), with LPM4 drawing only 0.1 µA (RAM retention). The analog comparator supports precision slope ADC, battery monitoring, and external signal comparison, while Timer_A3 provides PWM, interval timing, and capture/compare functions across 16 I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 general-purpose registers and 62.5-ns instruction cycle time - enables deterministic real-time execution and compact firmware footprint. |
| Memory | 4KB + 256B flash (main + info memory) and 256B RAM - sufficient for standalone sensor firmware with calibration data storage in segment A. |
| Supply Voltage | 1.8 V to 3.6 V - supports direct connection to single-cell Li-ion, alkaline, or coin-cell batteries without external regulation. |
| Active Current | 250 µA at 1 MHz, 2.2 V - enables multi-year battery life in duty-cycled sensor applications with frequent wake-ups. |
| Wake-up Time | <1 µs from standby mode - critical for responsive event-driven sensing (e.g., motion-triggered data capture). |
| Comparator Function | On-chip Comparator_A+ with 8-channel analog mux (CA0–CA7) - enables slope-based A/D conversion without external ADC components. |
| Package | 20-pin TSSOP (PW) - surface-mount compatible with automated assembly and space-constrained PCB layouts. |
Pinout & Package
Package: 20-pin Plastic Small-Outline Thin (TSSOP), body width 4.4 mm, JEDEC MO-153 compliant. Thermal performance optimized for low-power operation with no heatsink required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input / GPIO | Accepts external timing source for synchronous capture; default reset state is GPIO with programmable pullup/down. |
| P1.1/TA0/TDI/TCLK | Timer_A CCI0A / JTAG test interface | Dual-role pin: primary use as Timer_A capture input; repurposed as JTAG TDI/TCLK during programming/debugging. |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG test clock | Provides SMCLK for peripheral synchronization; serves as JTAG TCK when debug interface is active. |
| P2.0/ACLK/CA2 | ACLK output / comparator positive input | Drives 32-kHz crystal oscillator output to peripherals; selectable as CA2 analog input for differential comparisons. |
| XIN/P2.6/CA6 | Crystal oscillator input / comparator input | Primary 32-kHz crystal connection point; also functions as CA6 analog input when oscillator is disabled. |
| RST/NMI | Reset and non-maskable interrupt | Active-low asynchronous reset; doubles as NMI source for critical fault handling (e.g., brownout detection). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | LPM4 draws only 0.1 µA with RAM retention - extends shelf life and operational runtime in energy-harvesting or battery-only systems. |
| Factory-calibrated DCO | Four internal DCO frequencies (1/8/12/16 MHz) trimmed to ±1% accuracy - eliminates need for external crystal in cost-sensitive timing applications. |
| Integrated analog comparator | Supports slope A/D conversion, battery voltage supervision, and external signal threshold detection - reduces BOM count by replacing discrete comparators and ADCs. |
| On-chip emulation module (EEM) | Enables full-speed debugging, breakpoint setting, and flash programming via JTAG or UART-based BSL - accelerates firmware validation and field updates. |
| Programmable security fuse | Prevents unauthorized flash readout or modification - essential for protecting proprietary sensor algorithms and calibration data. |
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 executing sensor polling, slope ADC conversion via Comparator_A+, and low-power scheduling using Timer_A interrupts. Use Value: 250 µA active current and sub-1 µs wake-up minimize transmit duty cycle, extending CR2032 battery life beyond 2 years. |
Use Scenario: Handheld pulse oximeter with analog front-end and OLED display. IC Role / Device Role / Timing Role: System-on-chip managing LED drive timing, photodiode signal comparison, and display refresh via SMCLK-synchronized peripherals. Use Value: Integrated comparator replaces external op-amp/ADC chain; 4KB flash stores calibrated SpO₂ algorithms and UI assets. |
| Smart Utility Meter Interface | Industrial Condition Monitor |
|
Use Scenario: Tamper-resistant water/gas meter with magnetic switch detection and EEPROM logging. IC Role / Device Role / Timing Role: Low-power supervisor triggering wake-up on reed-switch closure, performing secure flash writes, and verifying supply integrity via brownout detector. Use Value: LPM4 current of 0.1 µA ensures >10-year battery backup for EEPROM write retention during main power loss. |
Use Scenario: Vibration sensor on rotating machinery with analog accelerometer input and local FFT preprocessing. IC Role / Device Role / Timing Role: Real-time signal conditioner using Timer_A for precise sampling intervals and Comparator_A+ for zero-crossing detection. Use Value: 16-bit CPU and 256B RAM enable lightweight digital filtering; 1.8 V minimum supply allows direct connection to isolated DC-DC outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F2131TRGET | 8KB flash, 256B RAM, same package and peripheral set - adds memory headroom for larger firmware or data buffers. | Suitable where future firmware expansion or extended data logging is anticipated without changing PCB layout. | Select when long-term feature scalability outweighs cost sensitivity; identical pinout and power profile simplify migration. |
| MSP430G2553IPW20 | 16KB flash, 512B RAM, enhanced USCI module (UART/SPI/I²C), but higher active current (360 µA @ 1 MHz, 3 V). | Better suited for applications requiring serial communication stacks or larger algorithmic payloads, at expense of peak battery life. | Choose when protocol connectivity (e.g., BLE host interface) or memory headroom is prioritized over absolute lowest active power. |
Compared with MSP430F2131TRGET and MSP430G2553IPW20, the MSP430F2121TRGET delivers optimal balance of ultra-low active/standby current, integrated analog functionality, and minimal BOM cost - making it ideal for cost-constrained, battery-limited sensor endpoints where communication is handled externally.
Availability
MSP430F2121TRGET is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart utility meter interfaces, and industrial condition monitors requiring stable component supply across extended production lifecycles.
Supply support for MSP430F2121TRGET 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 and industrial-grade reliability.
The MSP430F2121TRGET belongs to the MSP430x2xx family, engineered specifically for battery-operated measurement and sensing applications where extended runtime, analog integration, and robust low-power operation are mandatory design requirements.
FAQ
What is the maximum operating frequency of the MSP430F2121TRGET?
The MSP430F2121TRGET supports a maximum system clock (MCLK) frequency of 16 MHz when VCC ≥ 3.3 V and duty cycle is 50% ±10%. This is achieved using the factory-calibrated DCO or an external high-frequency crystal. At lower supply voltages (e.g., 2.2 V), the maximum reliable frequency drops to 6 MHz per TI's recommended operating conditions.
Does the MSP430F2121TRGET support in-system programming?
Yes, the MSP430F2121TRGET supports in-system programming via both JTAG (using MSP-FET430UIF or MSP-FET430U28) and the UART-based bootstrap loader (BSL). The BSL uses P1.1 (TXD) and P2.2 (RXD) and is protected by a user-configurable password stored in flash memory.
What analog inputs does the on-chip comparator support on the MSP430F2121TRGET?
The MSP430F2121TRGET's Comparator_A+ module supports eight analog inputs: CA0–CA7, mapped to P2.3, P2.4, P2.0, P2.1, P2.2, P2.5, P2.6, and P2.7 respectively. These can be selected via the CACTL1 register and used for slope A/D conversion, battery monitoring, or external signal threshold detection.
Is the MSP430F2121TRGET pin-compatible with other devices in the MSP430F21x1 family?
Yes, the MSP430F2121TRGET in the 20-pin TSSOP (PW) package shares identical pinout and electrical characteristics with MSP430F2101TRGET, MSP430F2111TRGET, and MSP430F2131TRGET - enabling drop-in replacement within the same package variant for memory-scaling design iterations.
What is the brownout reset threshold for the MSP430F2121TRGET?
The MSP430F2121TRGET features an internal brownout detector that asserts reset when VCC falls below approximately 1.3 V (typical) during power-up or operation. This threshold is fixed and unadjustable, ensuring reliable initialization and protection against erratic behavior under low-supply conditions.
MSP430F2121TRGET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-VFQFN Exposed Pad
- Series:
- MSP430F2xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- -
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 16
- 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:
- Slope A/D
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F2121TRGET FAQ
1.How can I place an order for MSP430F2121TRGET through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2121TRGET 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 MSP430F2121TRGET reliable?
The price and inventory of MSP430F2121TRGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2121TRGET is usually 5 days.
3.What payment methods are accepted for MSP430F2121TRGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2121TRGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2121TRGET?
MSP430F2121TRGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2121TRGET 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 MSP430F2121TRGET?
For technical support, including MSP430F2121TRGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2121TRGET requirements.
6.How does Aetrix verify that MSP430F2121TRGET is sourced from the original manufacturer or authorized distributors?
All MSP430F2121TRGET 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 MSP430F2121TRGET meets industry standards.
7.What is the process for return or replacement of MSP430F2121TRGET?
All MSP430F2121TRGET units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2121TRGET, 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 MSP430F2121TRGET part is unused and in its original packaging.
Return procedure for MSP430F2121TRGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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