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Texas Instruments MSP430I2040TPW
- Part No.:
- MSP430I2040TPW
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430I2040TPW.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,001
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Product details
Overview
MSP430I2040TPW from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller optimized for precision energy metering and battery-powered monitoring applications. It integrates four 24-bit sigma-delta ADCs with differential PGA inputs, operates across 2.2–3.6 V, delivers 275 µA/MHz active current at 16.384 MHz, and supports wake-up from LPM3 in 1 µs - enabling high-accuracy analog sensing in smart power strips and submeters.
For engineers reviewing the MSP430I2040TPW datasheet, MSP430I2040TPW pinout, MSP430I2040TPW application, or MSP430I2040TPW equivalent, key selection criteria include its 28-pin TSSOP package, 16 KB flash / 1 KB RAM memory configuration, four-channel SD24 ADC architecture, and dual eUSCI modules (UART/IrDA/SPI + SPI/I²C) for metrology interface flexibility.
Technical Context
The MSP430I2040TPW implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO) tunable to 16.384 MHz, enabling sub-5 µs wake-up from low-power modes. Its analog subsystem centers on four independent SD24 modules, each supporting programmable gain amplifiers and differential input pairs - critical for simultaneous voltage, current, and reference channel acquisition in single-phase metering.
Digital peripherals include two 16-bit Timer_A modules (each with three capture/compare registers), a hardware multiplier for real-time energy calculations, and dual eUSCI interfaces: eUSCI_A0 supports enhanced UART with auto-baud detection and IrDA, while eUSCI_B0 provides I²C and synchronous SPI for sensor and display communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and constant generators; enables compact, efficient firmware for metrology algorithms. |
| ADC Resolution & Count | Four independent 24-bit sigma-delta ADCs with differential PGA inputs; supports simultaneous multi-channel high-precision current/voltage measurement. |
| Flash / RAM | 16 KB flash program memory and 1 KB RAM; sufficient for embedded energy calculation engines and communication stacks. |
| Supply Voltage Range | 2.2 V to 3.6 V; compatible with standard 3.3 V systems and extended battery operation down to two alkaline cells. |
| Active Current | 275 µA/MHz at 16.384 MHz, 3.0 V (typical); enables high-speed ADC sampling and computation without excessive thermal load. |
| Low-Power Modes | LPM3 (210 µA), LPM4 (70 µA), LPM4.5 (75 nA); supports years of operation on coin-cell batteries in standby monitoring. |
| Package | 28-pin TSSOP (PW); 9.7 mm × 4.4 mm footprint with exposed thermal pad on RHB variant - not present in PW. |
Pinout & Package
Package: 28-pin TSSOP (PW), body size 9.7 mm × 4.4 mm. Pin count and signal mapping match the MSP430I2040TRHB variant except pins 29–32 (P2.4–P2.7), which are not available in the PW package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+ / A0.0− | SD24 Channel 0 differential analog input | Primary current-sensing input pair; requires matched PCB routing and shorting to AVSS if unused. |
| A1.0+ / A1.0− | SD24 Channel 1 differential analog input | Secondary current or voltage channel; supports PGA gain settings up to 32× for shunt-based sensing. |
| A2.0+ / A2.0− | SD24 Channel 2 differential analog input | Voltage reference or auxiliary measurement path; shares internal reference with other SD24 channels. |
| A3.0+ / A3.0− | SD24 Channel 3 differential analog input | Isolated neutral or temperature compensation input; enables 4-wire metrology configurations. |
| VREF | External reference voltage input | Accepts external precision reference (e.g., REF3025); must be decoupled with CVREF capacitor to AVSS when internal reference is used. |
| RST/NMI/SBWTDIO | Reset / NMI input / Spy-Bi-Wire data I/O | Single-pin debug and programming interface; supports in-system programming without external voltage. |
| P1.0–P1.7, P2.0–P2.3 | Configurable GPIO / peripheral multiplexing | 16 total I/O pins; support timer capture/compare, eUSCI functions, and VMONIN for supply monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Four 24-bit SD24 ADCs with PGA | Enables simultaneous high-resolution acquisition of voltage, current, neutral, and reference channels - essential for Class 0.2 metering accuracy. |
| Integrated LDO with 1.8-V core supply | Stabilizes internal logic independently of VCC fluctuations; improves ADC noise immunity and timing consistency across supply range. |
| eUSCI_A0 with IrDA encoder/decoder | Supports optical pulse reading and utility infrared communication protocols without external transceivers. |
| Hardware multiplier (16×16) | Accelerates RMS, watt-hour, and harmonic calculations in firmware; reduces CPU load during continuous sampling intervals. |
| 1 µs wake-up from LPM3 | Allows rapid response to event-triggered sampling (e.g., zero-crossing detection) while maintaining ultra-low average power. |
Applications
| Smart Power Strip | Submetering Module |
|---|---|
|
Use Scenario: Real-time per-outlet power consumption monitoring and overload protection in residential/commercial power strips. IC Role / Device Role / Timing Role: Primary metrology controller performing simultaneous voltage/current sampling, energy accumulation, and UART-based host reporting. Use Value: Four SD24 ADCs enable concurrent measurement of line voltage, neutral current, and two outlet currents - eliminating need for external ADCs or multiplexing delays. |
Use Scenario: Retrofit energy monitoring for HVAC, lighting, or tenant-level circuits in commercial buildings. IC Role / Device Role / Timing Role: Standalone metering SoC handling analog front-end, computation, and I²C/SPI communication to gateway MCU. Use Value: Integrated eUSCI_B0 I²C interface allows direct connection to environmental sensors (temp/humidity) and display modules without level-shifting or bus arbitration logic. |
| Medical Patient Monitor | DC Power Analyzer |
|
Use Scenario: Portable multi-parameter vital sign monitor measuring ECG, respiration, and SpO₂ using analog front-end conditioning. IC Role / Device Role / Timing Role: High-precision analog acquisition engine with programmable gain and 24-bit resolution for low-amplitude biopotential signals. Use Value: Differential PGA inputs reject common-mode noise from electrode interfaces; LPM4.5 mode (75 nA) extends battery life between clinical measurements. |
Use Scenario: Precision DC power analysis for solar charge controllers, battery test systems, and lab-grade power supplies. IC Role / Device Role / Timing Role: Dual-channel high-accuracy current/voltage measurement node with integrated reference and temperature compensation. Use Value: Internal temperature sensor and supply monitor (VMONIN) enable real-time drift correction of SD24 conversion results - improving long-term stability without calibration hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar metrology microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430I2041TPW | 32 KB flash / 2 KB RAM; identical ADC/peripheral set and pinout in same 28-pin TSSOP package. | Required for larger firmware (e.g., DLMS/COSEM protocol stacks) or future-proofed designs needing code expansion headroom. | Select MSP430I2041TPW when >16 KB flash is needed; otherwise MSP430I2040TPW offers optimal cost/performance balance. |
| MSP430I2030TPW | Three 24-bit SD24 ADCs (vs. four); same 16 KB flash / 1 KB RAM, 28-pin TSSOP, and peripheral complement. | Suitable for single-current + voltage metering where neutral or auxiliary channel is omitted (e.g., basic plug-in monitors). | Choose MSP430I2030TPW to reduce BOM cost when fourth ADC channel is unnecessary; no PCB change required. |
Compared with MSP430I2041TPW and MSP430I2030TPW, the MSP430I2040TPW delivers the exact ADC count and memory size needed for cost-sensitive, four-channel metrology - avoiding over-provisioning while retaining full pin compatibility with both alternatives in the 28-pin TSSOP package.
Availability
MSP430I2040TPW is available at Aetrix Electronics and suitable for smart power strip design, submetering module production, and portable medical monitoring systems requiring stable component supply and long-term industrial availability.
Supply support for MSP430I2040TPW 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 microcontrollers and precision analog signal chains.
The MSP430i204x series belongs to TI's Metrology and Monitoring portfolio, designed specifically for high-accuracy energy measurement, battery-operated sensing, and cost-sensitive industrial monitoring applications requiring integrated analog front-ends and deterministic low-power operation.
FAQ
What is the maximum system clock frequency supported by the MSP430I2040TPW?
The MSP430I2040TPW supports a maximum system clock frequency of 16.384 MHz, achieved via its internal digitally controlled oscillator (DCO). This frequency is factory-trimmed and stable across voltage and temperature, enabling precise timing for sigma-delta ADC oversampling and real-time energy calculations without external crystals.
Does the MSP430I2040TPW include an internal voltage reference for the SD24 ADCs?
Yes, the MSP430I2040TPW includes an internal voltage reference for the SD24 ADCs. When SD24REFS = 1, the internal reference is enabled and the VREF pin must not be externally loaded - only decoupled with the recommended capacitor (CVREF) to AVSS. This eliminates need for external reference ICs in most metering designs.
How many general-purpose I/O pins does the MSP430I2040TPW provide in the 28-pin TSSOP package?
The MSP430I2040TPW provides 16 general-purpose I/O pins in the 28-pin TSSOP (PW) package: P1.0–P1.7 and P2.0–P2.3. Pins P2.4–P2.7 are not physically present in this package variant and must be disabled in software if referenced in shared firmware with RHB-package variants.
Can the MSP430I2040TPW perform UART communication with automatic baud-rate detection?
Yes, the MSP430I2040TPW's eUSCI_A0 module supports enhanced UART with automatic baud-rate detection. This feature allows the MSP430I2040TPW to synchronize with unknown host UART rates - useful in field-deployed submeters where upstream gateways may use non-standard baud settings without prior configuration.
What low-power mode achieves the lowest current draw on the MSP430I2040TPW?
The MSP430I2040TPW achieves its lowest current draw in shutdown mode (LPM4.5), consuming just 75 nA at 3.0 V with full RAM retention. This mode disables all clocks and regulators except the RAM retention circuit, making it ideal for battery-backed metering devices requiring multi-year standby with instant wake-on-interrupt capability.
MSP430I2040TPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430I2xx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPU16
- Core Size:
- 16-Bit
- Speed:
- 16.384Mhz
- Connectivity:
- I2C, IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, PWM, WDT
- Number of I/O:
- 12
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 3.6V
- Data Converters:
- A/D 4x24b Sigma-Delta
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430I2040TPW FAQ
1.How can I place an order for MSP430I2040TPW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430I2040TPW 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 MSP430I2040TPW reliable?
The price and inventory of MSP430I2040TPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430I2040TPW is usually 5 days.
3.What payment methods are accepted for MSP430I2040TPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430I2040TPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430I2040TPW?
MSP430I2040TPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430I2040TPW 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 MSP430I2040TPW?
For technical support, including MSP430I2040TPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430I2040TPW requirements.
6.How does Aetrix verify that MSP430I2040TPW is sourced from the original manufacturer or authorized distributors?
All MSP430I2040TPW 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 MSP430I2040TPW meets industry standards.
7.What is the process for return or replacement of MSP430I2040TPW?
All MSP430I2040TPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430I2040TPW, 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 MSP430I2040TPW part is unused and in its original packaging.
Return procedure for MSP430I2040TPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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