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Texas Instruments MSP430F2121TDGV
- Part No.:
- MSP430F2121TDGV
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430F2121TDGV.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
MSP430F2121TDGV from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 4KB flash, 256B RAM, a 16-bit Timer_A with three capture/compare registers, and an on-chip analog comparator for slope A/D conversion - deployed in battery-powered sensor nodes and portable measurement systems.
For engineers reviewing the MSP430F2121TDGV datasheet, MSP430F2121TDGV pinout, MSP430F2121TDGV application, or MSP430F2121TDGV equivalent, key selection criteria include its -40°C to 105°C industrial temperature rating, 20-pin TVSOP (DGV) package, 1.8–3.6 V supply range, sub-1 µs wake-up from standby, and integrated DCO with four factory-calibrated frequencies up to 16 MHz.
Technical Context
The MSP430F2121TDGV implements a 16-bit RISC CPU with constant generators and seven addressing modes, executing register-to-register instructions in one CPU clock cycle. Its basic clock module supports ACLK (32 kHz crystal), SMCLK, and MCLK sourced from either the internal DCO (calibrated at 1/8/12/16 MHz) or external high-frequency crystal.
Power management includes six operating modes: Active Mode (250 µA @ 1 MHz, 2.2 V), LPM0–LPM3 (0.7–32 µA), and LPM4 (0.1 µA RAM retention). The analog comparator enables slope-based A/D conversion without external components, while Timer_A3 provides PWM, interval timing, and capture/compare functionality across 16 I/O 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 | 4KB + 256B flash / 256B RAM - sufficient for standalone sensor firmware with calibration data storage in info memory segment A. |
| Supply Voltage | 1.8 V to 3.6 V - supports direct operation from single Li-ion, two alkaline, or regulated 3.3 V rails without level-shifting. |
| Ultra-Low Power | 0.1 µA in LPM4 (RAM retention) - extends battery life in intermittently active sensor endpoints beyond 10 years on CR2032. |
| Wake-Up Time | <1 µs from standby - meets strict latency requirements in responsive wake-on-event systems like smoke detectors or motion triggers. |
| DCO Accuracy | ±1% at four factory-calibrated frequencies (1/8/12/16 MHz) - eliminates need for external crystal in cost-sensitive timing applications. |
| Operating Temp | -40°C to +105°C - qualified for under-hood automotive, industrial control, and outdoor environmental monitoring deployments. |
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 (to be connected to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/TACLK | Timer_A clock input | Accepts external event signal for precise timestamping or gated timer operation. |
| P1.1/TA0 | Timer_A channel 0 I/O | Configurable as capture input (CCI0A) or compare output (Out0) - used for PWM generation or pulse-width measurement. |
| P1.2/TA1 | Timer_A channel 1 I/O | Supports independent PWM or capture on second timer channel - enables dual-signal timing analysis. |
| P1.3/TA2 | Timer_A channel 2 I/O | Third capture/compare channel - allows simultaneous monitoring of three analog events or motor phase signals. |
| P1.4/SMCLK/TCK | Sub-main clock output / JTAG test clock | Provides SMCLK for peripheral synchronization or serves as TCK during programming/debugging. |
| P1.5/TA0/TMS | Timer_A channel 0 / JTAG mode select | Dual-function pin: Out0 output or JTAG TMS - requires careful pinmux configuration during debug vs runtime use. |
| P1.6/TA1/TDI/TCLK | Timer_A channel 1 / JTAG data input / test clock | Shared path for timer output or JTAG data - not usable as general I/O when JTAG is active. |
| P1.7/TA2/TDO/TDI | Timer_A channel 2 / JTAG data output/input | Enables boundary-scan visibility but restricts TA2 use during debugging sessions. |
| P2.0/ACLK/CA2 | ACLK output / comparator input CA2 | Drives 32 kHz clock to external logic or feeds analog reference into comparator for threshold detection. |
| P2.1/INCLK/CA3 | Timer_A internal clock / comparator input CA3 | Routes DCO or crystal output to Timer_A for frequency measurement or uses as comparator reference. |
| P2.2/CAOUT/TA0/CA4 | Comparator output / Timer_A channel 0 / CA4 input | Delivers comparator decision directly to timer for edge-triggered actions or as analog input source. |
| P2.3/CA0/TA1 | Comparator input CA0 / Timer_A channel 1 | Primary analog sensing node - connects to external sensor while supporting concurrent timer function. |
| P2.4/CA1/TA2 | Comparator input CA1 / Timer_A channel 2 | Second analog input - enables differential or dual-threshold comparisons without external op-amps. |
| P2.5/CA5 | Comparator input CA5 | Dedicated analog input - expands sensing capability to five channels (CA0–CA5) for multi-parameter monitoring. |
| XIN/P2.6/CA6 | Crystal oscillator input / comparator input CA6 | Connects 32 kHz watch crystal or high-frequency crystal; also serves as sixth analog input. |
| XOUT/P2.7/CA7 | Crystal oscillator output / comparator input CA7 | Drives crystal load; double-use as seventh analog input - increases analog front-end flexibility. |
| RST/NMI | Reset / non-maskable interrupt | Hardware reset initiation or high-priority fault handling - critical for fail-safe system recovery. |
| TEST | JTAG test mode enable | Activates JTAG interface for programming and emulation - must be pulled low during normal operation. |
| VCC | Supply voltage | Primary power rail - requires local 100 nF ceramic decoupling adjacent to pin per TI layout guidelines. |
| VSS | Ground reference | Common return path - thermal pad must be soldered to solid VSS plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip analog comparator | Enables slope A/D conversion using internal timer - eliminates external ADC and reduces BOM count by one IC. |
| Bootstrap loader (BSL) | Permits field firmware updates via UART on P1.1/P2.2 - avoids need for JTAG hardware in production units. |
| Digital-controlled oscillator (DCO) | Four factory-trimmed frequencies (1/8/12/16 MHz) with ±1% accuracy - removes crystal requirement in cost-sensitive designs. |
| Five low-power modes | LPM0–LPM4 with current as low as 0.1 µA - extends coin-cell battery life to >10 years in periodic wake-up sensor applications. |
| 16-bit Timer_A3 | Three independent capture/compare registers support simultaneous PWM generation, input capture, and interval timing - simplifies motor control or signal analysis firmware. |
Applications
| Wireless Sensor Node | Battery-Powered Data Logger |
|---|---|
Use Scenario: Compact environmental monitor measuring temperature, humidity, and light intensity, transmitting data via sub-GHz RF link every 5 minutes. IC Role / Device Role / Timing Role: Central controller managing sensor polling, slope A/D conversion via comparator, low-power timer wake-up, and UART-based RF module control. Use Value: 0.1 µA LPM4 current and sub-1 µs wake-up minimize energy per measurement cycle, enabling 5+ year operation on CR2032. | Use Scenario: Industrial vibration logger mounted on rotating machinery, capturing acceleration waveforms at 1 kHz for predictive maintenance analysis. IC Role / Device Role / Timing Role: Real-time signal conditioner with analog comparator front-end, Timer_A3 for precise sampling intervals, and flash-based waveform buffering. Use Value: 4KB flash stores 30 seconds of raw 16-bit samples; 16 MHz DCO ensures accurate 1 kHz sampling without external clock. |
| Smart Meter Tamper Detection | Portable Medical Diagnostic Device |
Use Scenario: Utility meter detecting magnetic tampering via Hall sensor and physical intrusion via mechanical switch, triggering secure alert transmission. IC Role / Device Role / Timing Role: Low-power security monitor using comparator inputs for analog threshold detection and GPIO interrupts for digital switch events. Use Value: Independent CA0–CA7 inputs allow simultaneous monitoring of six tamper sensors; brownout detector prevents false alerts during voltage dips. | Use Scenario: Handheld blood glucose meter performing electrochemical strip analysis with automatic calibration and LCD display. IC Role / Device Role / Timing Role: Mixed-signal controller executing slope A/D on amperometric current, driving LCD segments, and managing button interface with wake-on-press. Use Value: Integrated comparator and Timer_A eliminate external precision ADC; 105°C rating ensures reliability in warm clinical environments. |
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 |
|---|---|---|---|
| MSP430F2122TDGV | Same package and pinout; adds 16-bit sigma-delta ADC with 16-bit resolution and 200 kSPS - no comparator-based slope A/D needed. | Required when high-precision analog measurements (e.g., medical biosensors) replace threshold-based detection. | Select MSP430F2122TDGV if ADC resolution >12 bits is mandatory; retain MSP430F2121TDGV for cost-sensitive comparator-only use cases. |
| MSP430G2553IPW28 | 28-pin TSSOP; 16KB flash, 512B RAM, built-in UART/USCI; lacks factory-calibrated DCO - requires external crystal for timing accuracy. | Suitable for designs needing serial communication peripherals and larger code space, but increases board area and BOM cost. | Choose MSP430G2553IPW28 when UART/I2C interfaces are essential and PCB space allows 28-pin footprint; MSP430F2121TDGV remains optimal for minimal-footprint, crystal-free timing. |
Compared with MSP430F2122TDGV and MSP430G2553IPW28, the MSP430F2121TDGV delivers the lowest system cost and smallest PCB footprint for comparator-centric, crystal-free, sub-1 µs wake-up applications - making it ideal for high-volume disposable or space-constrained sensor endpoints.
Availability
MSP430F2121TDGV is available at Aetrix Electronics and suitable for wireless sensor nodes, battery-powered data loggers, and smart meter tamper detection requiring stable component supply across industrial temperature ranges and long-term production continuity.
Supply support for MSP430F2121TDGV 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The MSP430F21x1 product line targets ultra-low-power portable measurement and sensing applications - designed to maximize battery life through aggressive power gating, fast wake-up, and integrated analog peripherals that reduce external component count.
FAQ
What is the maximum operating frequency of the MSP430F2121TDGV?
The MSP430F2121TDGV supports a maximum system clock (MCLK) frequency of 16 MHz, achievable using the internal digitally controlled oscillator (DCO) with factory calibration. This frequency is guaranteed across the full -40°C to +105°C operating range when VCC ≥3.3 V and duty cycle is 50% ±10%. At lower supply voltages, the maximum frequency is reduced: 12 MHz at VCC ≥2.7 V and 6 MHz at VCC = 1.8 V. The MSP430F2121TDGV does not require an external crystal to reach these speeds due to its calibrated DCO.
Does the MSP430F2121TDGV support in-system programming without external hardware?
Yes, the MSP430F2121TDGV supports in-system programming via its integrated bootstrap loader (BSL), which operates over UART using pins P1.1 (TX) and P2.2 (RX). No external programmer is required - firmware updates can be performed using only a UART interface and user-defined password protection. The BSL is enabled by default; it can be disabled permanently by writing 0xAA55 to address 0xFFDE, or configured to prevent flash erasure on invalid password entry by writing 0x0000.
How many analog comparator inputs does the MSP430F2121TDGV provide?
The MSP430F2121TDGV provides seven dedicated analog comparator inputs: CA0 through CA7, mapped to pins P2.3, P2.4, P2.5, XIN/P2.6, XOUT/P2.7, P2.0, and P2.1 respectively. These inputs support slope analog-to-digital conversion, battery voltage supervision, and external signal monitoring. The comparator output (CAOUT) is routed to P2.2 and can trigger Timer_A3 capture events, enabling fully integrated threshold-based timing without external components.
What is the pin-compatible replacement for the MSP430F2121TDGV in the same TVSOP-20 package?
No pin-compatible replacement exists for the MSP430F2121TDGV within the same TVSOP-20 (DGV) package. While other MSP430F21x1 variants (e.g., MSP430F2131TDGV) share identical pinout and package, they differ in flash/RAM size and are not drop-in replacements due to memory map and peripheral register variations. The MSP430F2122TDGV is pinout-identical but introduces a sigma-delta ADC instead of the comparator-based A/D architecture - requiring firmware changes to leverage new peripherals. True pin-to-pin alternatives are not available from Texas Instruments or third-party vendors.
What development tools are recommended for the MSP430F2121TDGV?
Texas Instruments recommends the MSP-FET430UIF USB Flash Emulation Tool for debugging and programming the MSP430F2121TDGV, paired with the MSP-TS430PW28 target socket board (which accommodates the 20-pin TVSOP package via adapter). Code development is supported in Code Composer Studio v6+ and IAR Embedded Workbench. For production programming, the MSP-GANG430 gang programmer supports parallel programming of up to eight devices. All tools interface via the standard 2-wire JTAG (SBW) protocol using the TEST and RST/NMI pins.
MSP430F2121TDGV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Series:
- MSP430F2xx
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- 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:
MSP430F2121TDGV FAQ
1.How can I place an order for MSP430F2121TDGV through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F2121TDGV 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 MSP430F2121TDGV reliable?
The price and inventory of MSP430F2121TDGV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F2121TDGV is usually 5 days.
3.What payment methods are accepted for MSP430F2121TDGV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F2121TDGV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F2121TDGV?
MSP430F2121TDGV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F2121TDGV 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 MSP430F2121TDGV?
For technical support, including MSP430F2121TDGV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F2121TDGV requirements.
6.How does Aetrix verify that MSP430F2121TDGV is sourced from the original manufacturer or authorized distributors?
All MSP430F2121TDGV 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 MSP430F2121TDGV meets industry standards.
7.What is the process for return or replacement of MSP430F2121TDGV?
All MSP430F2121TDGV units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F2121TDGV, 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 MSP430F2121TDGV part is unused and in its original packaging.
Return procedure for MSP430F2121TDGV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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