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Texas Instruments MSP430F2121IDGV
- Part No.:
- MSP430F2121IDGV
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F2121IDGV.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
MSP430F2121IDGV from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 4 KB flash, 256 B RAM, a 16-bit Timer_A with three capture/compare registers, and an integrated analog comparator for slope A/D conversion - deployed in battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F2121IDGV datasheet, MSP430F2121IDGV pinout, MSP430F2121IDGV application, or MSP430F2121IDGV equivalent, key selection criteria include active-mode current at 1 MHz (250 μA @ 2.2 V), standby current (0.7 μA), LPM4 retention current (0.1 μA), DCO wake-up time (<1 μs), and 20-pin TVSOP (DGV) package compatibility with JTAG and BSL programming.
Technical Context
The MSP430F2121IDGV implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register instructions in one CPU cycle. Its basic clock module supports internal DCO (calibrated to ±1% at 1/8/12/16 MHz), 32-kHz crystal (ACLK), and external high-frequency sources - enabling flexible low-power timing across five software-selectable LPMs.
Peripherals include a programmable analog comparator with eight input channels (CA0–CA7), Timer_A3 with three independent capture/compare registers supporting PWM, interval timing, and event counting, and two 8-bit I/O ports (P1/P2) with individually configurable pullup/down resistors, edge-selectable interrupts, and JTAG/BSL debug support via dedicated pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and 62.5-ns instruction cycle time - enables efficient C code execution and deterministic real-time response. |
| Memory | 4 KB + 256 B flash (main + info memory) and 256 B RAM - sufficient for standalone sensor firmware with calibration data storage in segment A. |
| Supply Voltage | 1.8 V to 3.6 V - supports direct operation from single-cell Li-ion, alkaline, or coin-cell batteries without regulation. |
| Active Current | 250 μA at 1 MHz, 2.2 V - defines baseline power budget for continuous sensing and processing in energy-constrained designs. |
| Low-Power Modes | LPM4 draws 0.1 μA with RAM retention - enables multi-year operation in wake-on-event applications like smoke detectors or environmental monitors. |
| Wake-Up Time | <1 μs from standby (LPM3/LPM4) via DCO - ensures rapid response to external interrupts while preserving ultra-low quiescent power. |
| Comparator Function | Analog comparator with slope A/D capability and eight selectable inputs (CA0–CA7) - eliminates need for external ADC in simple threshold-detection systems. |
Pinout & Package
Package: 20-pin Thin Shrink Small-Outline Package (TVSOP), suffix DGV, body size 4.4 mm × 6.5 mm, 0.65 mm pitch, exposed thermal pad recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input / general I/O | Accepts external timing source for precise event capture; default function configurable via port control registers. |
| P1.1/TA0/TDI/TCLK | Timer_A compare output / JTAG test interface | Serves dual role: generates PWM or toggles on compare match; also routes TDI/TCLK for in-circuit debugging and programming. |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG test clock | Provides SMCLK signal to peripherals; doubles as TCK for synchronous JTAG communication during development and production test. |
| P2.0/ACLK/CA2 | ACLK output / comparator positive input | Drives 32-kHz crystal oscillator output to system modules; simultaneously feeds CA2 for low-power analog monitoring. |
| XIN/P2.6/CA6 | Crystal oscillator input / comparator input | Connects to low-frequency crystal; also functions as CA6 input - allows shared pin usage between timing and analog sensing paths. |
| RST/NMI | Reset or non-maskable interrupt input | Hardware reset initiation or high-priority interrupt trigger; level-sensitive with internal pullup - ensures reliable system recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.1 μA LPM4 current with full RAM retention enables decade-scale battery life in intermittent-sensing applications. |
| Integrated analog comparator | Eight-channel input mux (CA0–CA7) with CAOUT output supports slope-based A/D conversion - reduces BOM count by eliminating external ADC. |
| On-chip emulation module (EEM) | Enables full-speed debugging, breakpoint setting, and flash programming via JTAG without external hardware debug probes. |
| Dual programming interfaces | JTAG (via P1.6/P1.7) and UART-based bootstrap loader (via P1.1/P2.2) provide field-upgrade capability without dedicated programmers. |
| Digital-controlled oscillator (DCO) | Four factory-calibrated frequencies (1/8/12/16 MHz) with ±1% accuracy - eliminates need for external crystal in cost-sensitive timing applications. |
Applications
| Wireless Sensor Node | Battery-Powered Data Logger |
|---|---|
Use Scenario: Compact environmental monitor measuring temperature/humidity and transmitting data via sub-GHz RF transceiver. IC Role / Device Role / Timing Role: Central controller managing sensor readout, data formatting, low-power RF transmission scheduling, and sleep/wake cycles. Use Value: 0.1 μA LPM4 retention current extends CR2032 battery life beyond 5 years; integrated comparator validates sensor thresholds before wake-up. |
Use Scenario: Standalone industrial logger recording voltage/current waveforms at fixed intervals onto internal flash memory. IC Role / Device Role / Timing Role: Real-time data acquisition unit using Timer_A for precise sampling intervals and comparator for trigger-based capture. Use Value: 4 KB flash stores firmware and 2+ weeks of timestamped samples; 256 B RAM buffers burst reads before flash writes. |
| Smart Smoke Detector | Portable Medical Sensor |
Use Scenario: UL-certified residential smoke detector performing periodic self-test, analog smoke chamber monitoring, and audible alarm activation. IC Role / Device Role / Timing Role: Safety-critical controller executing watchdog-checked firmware, analog comparator-based chamber voltage analysis, and buzzer drive logic. Use Value: Brownout detector prevents erratic behavior during battery depletion; <1 μs wake-up ensures immediate response to smoke events. |
Use Scenario: Wearable pulse oximeter acquiring photodiode signals, computing SpO₂, and displaying results on segmented LCD. IC Role / Device Role / Timing Role: Mixed-signal processor handling analog front-end conditioning, digital filtering, LCD segment driving, and button interface. Use Value: 16-bit Timer_A generates precise LED drive timing; 20-pin TVSOP fits compact PCB layout; 1.8 V minimum supply supports single AAA cell. |
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 |
|---|---|---|---|
| MSP430F2131IDGV | 8 KB flash, 256 B RAM, same peripherals and package - double program memory capacity. | Suitable for applications requiring larger firmware (e.g., BLE stack integration or advanced signal processing). | Select when future firmware expansion or bootloader complexity demands >4 KB flash space. |
| MSP430G2553IPW20 | 16 MB flash, 512 B RAM, enhanced USCI (UART/SPI/I²C), but no comparator; 20-pin TSSOP (PW) package. | Requires external comparator for analog thresholding; better suited for communication-centric designs than analog-sensing ones. | Choose if serial protocol support (I²C/SPI) is prioritized over integrated analog functionality and lowest possible active current. |
Compared with MSP430F2131IDGV and MSP430G2553IPW20, the MSP430F2121IDGV delivers optimal balance of analog integration, ultra-low standby power, and compact footprint - making it the preferred choice for cost-sensitive, battery-limited sensor endpoints where comparator-based A/D suffices and flash headroom is moderate.
Availability
MSP430F2121IDGV is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, smart smoke detectors, and portable medical sensors requiring stable component supply and long-term lifecycle support.
Supply support for MSP430F2121IDGV 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 leadership in ultra-low-power microcontroller innovation.
The MSP430F2121IDGV belongs to the MSP430x2xx family, designed specifically for extended-battery-life portable measurement and sensing applications - emphasizing minimal active/standby current, integrated analog peripherals, and robust low-power mode transitions.
FAQ
What is the maximum operating frequency of the MSP430F2121IDGV?
The MSP430F2121IDGV supports a maximum MCLK frequency of 16 MHz when VCC ≥3.3 V, with factory-calibrated DCO settings at 1/8/12/16 MHz. At 2.7 V, the maximum guaranteed frequency is 12 MHz, and at 1.8 V it is 6 MHz - all specified under recommended operating conditions with 50% duty cycle.
Does the MSP430F2121IDGV support in-system programming?
Yes, the MSP430F2121IDGV supports in-system programming via both JTAG interface (using pins P1.6/TDI and P1.7/TDO) and UART-based bootstrap loader (using P1.1/TX and P2.2/RX). The BSL is protected by a user-configurable password and can be disabled via security key at address 0xFFDE.
What analog peripherals are integrated into the MSP430F2121IDGV?
The MSP430F2121IDGV integrates a single analog comparator module (Comparator_A+) with eight selectable positive inputs (CA0–CA7), one common negative input, and CAOUT output. It supports slope analog-to-digital conversion, battery voltage supervision, and external signal monitoring - no external op-amp or ADC required for basic threshold detection.
Which low-power modes are available on the MSP430F2121IDGV, and what is the lowest current draw?
The MSP430F2121IDGV offers six operating modes: Active Mode (AM) and five low-power modes (LPM0–LPM4). The lowest current draw is 0.1 μA in LPM4 with RAM retention and oscillator disabled - verified at 2.2 V and 25°C per SLAS439F datasheet Table 7.
Is the MSP430F2121IDGV pin-compatible with other devices in the MSP430F21x1 family?
Yes, the MSP430F2121IDGV shares identical pinout and electrical characteristics with MSP430F2101IDGV, MSP430F2111IDGV, and MSP430F2131IDGV in the 20-pin TVSOP (DGV) package - enabling drop-in replacement within the same family for memory-scaling design iterations.
MSP430F2121IDGV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tube
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F2121IDGV FAQ
1.How can I place an order for MSP430F2121IDGV through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2121IDGV 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 MSP430F2121IDGV reliable?
The price and inventory of MSP430F2121IDGV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2121IDGV is usually 5 days.
3.What payment methods are accepted for MSP430F2121IDGV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2121IDGV transactions.
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4.How is shipping managed for MSP430F2121IDGV?
MSP430F2121IDGV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2121IDGV 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 MSP430F2121IDGV?
For technical support, including MSP430F2121IDGV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2121IDGV requirements.
6.How does Aetrix verify that MSP430F2121IDGV is sourced from the original manufacturer or authorized distributors?
All MSP430F2121IDGV 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 MSP430F2121IDGV meets industry standards.
7.What is the process for return or replacement of MSP430F2121IDGV?
All MSP430F2121IDGV units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2121IDGV, 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 MSP430F2121IDGV part is unused and in its original packaging.
Return procedure for MSP430F2121IDGV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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