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Texas Instruments MSP430I2040TPWR
- Part No.:
- MSP430I2040TPWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MSP430I2040TPWR.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,975
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Product details
Overview
MSP430I2040TPWR from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller designed for precision energy metering and sensor signal acquisition. It integrates four 24-bit sigma-delta ADCs with differential PGA inputs, operates from 2.2 V to 3.6 V, delivers 16.384-MHz system clock via internal DCO, and supports 16 I/O pins in a 28-pin TSSOP package - enabling high-accuracy current/voltage measurement in smart plugs and submeters.
For engineers reviewing the MSP430I2040TPWR datasheet, MSP430I2040TPWR pinout, MSP430I2040TPWR application, or MSP430I2040TPWR equivalent, key selection criteria include its 4-channel 24-bit SD24 ADC architecture, LPM4.5 shutdown current of 75 nA, eUSCI_A0 UART/IrDA/SPI and eUSCI_B0 SPI/I²C interfaces, and support for metrology-grade analog front-end design with integrated voltage monitor and temperature sensor.
Technical Context
The MSP430I2040TPWR implements a 16-bit RISC CPU with constant generators and hardware multiplier (16×16), optimized for deterministic real-time processing in battery-powered metering systems. Its clock system combines a 16.384-MHz digitally controlled oscillator (DCO) with external resistor or internal calibration modes, enabling sub-5 µs wake-up from LPM3/LPM4.
Analog subsystem integration includes four independent SD24 modules with programmable gain amplifiers, differential input pairs (A0.0± to A3.0±), internal/external reference selection (VREF pin), and built-in voltage monitor (VMONIN). Digital peripherals comprise two 16-bit Timer_A modules (each with three capture/compare registers), eUSCI_A0 (UART/IrDA/SPI), and eUSCI_B0 (SPI/I²C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with 16 registers and hardware multiplier - enables efficient fixed-point DSP for metrology algorithms without external co-processor. |
| ADC Resolution & Count | Four independent 24-bit sigma-delta ADCs with differential PGA inputs - supports simultaneous high-precision current, voltage, neutral, and auxiliary channel sampling in single-phase meters. |
| Ultra-Low Power Modes | LPM4.5 shutdown draws 75 nA at 3.0 V - extends battery life to years in tamper-detection or backup power monitoring applications. |
| Communication Interfaces | eUSCI_A0 (UART with auto-baud detection + IrDA + SPI) and eUSCI_B0 (SPI + I²C) - enables dual-interface connectivity to host MCU, display, or communication ICs without external level shifters. |
| Supply & Regulation | Integrated LDO delivers regulated 1.8-V core supply (VCORE); supply voltage monitor with programmable threshold - ensures reliable operation during brownout or line-sag events in AC-powered metering. |
| Package & Pin Count | 28-pin TSSOP (PW), 9.7 mm × 4.4 mm body - provides compact footprint for space-constrained smart outlet and DIN-rail submeter PCB layouts. |
Pinout & Package
Package: 28-pin TSSOP (PW), 9.7 mm × 4.4 mm body size. Thermal pad not present in PW variant; no thermal pad connection required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+ / A0.0− | SD24 Channel 0 differential analog input | Accepts ±2.5 V full-scale differential signals; requires shorted pair termination to AVSS if unused - critical for noise immunity in shunt-based current sensing. |
| A1.0+ / A1.0− | SD24 Channel 1 differential analog input | Supports isolated voltage measurement via resistive divider; paired with internal 1.2-V reference or external VREF for <10 ppm/°C drift performance. |
| A2.0+ / A2.0− | SD24 Channel 2 differential analog input | Enables neutral-line monitoring or auxiliary sensor interface; shares same PGA gain settings as A0/A1 - simplifies calibration across multiple channels. |
| VREF | External reference voltage input | Accepts 1.2–2.5 V external reference; must be decoupled with CVREF capacitor to AVSS when internal reference is selected - prevents reference coupling into ADC conversions. |
| RST/NMI/SBWTDIO | Reset / NMI input / Spy-Bi-Wire data I/O | Single-pin debug interface for programming and in-circuit emulation; supports low-pin-count production programming without JTAG header. |
| P1.0–P1.7, P2.0–P2.3 | General-purpose I/O with peripheral multiplexing | 16 total GPIOs; each supports interrupt capability and configurable pullup/pulldown - allows direct connection to LED indicators, relays, or optocouplers in smart power strip designs. |
Key Features
| Feature | Design Value |
|---|---|
| Four 24-bit SD24 ADCs with PGA | Enables simultaneous high-resolution sampling of up to four analog channels (e.g., phase current, line voltage, neutral current, temperature) with <100 ppm THD and >100 dB SNR - meets IEC 62053-21 Class 0.2 accuracy requirements. |
| 75 nA LPM4.5 shutdown current | Allows multi-year operation on coin-cell batteries in tamper-alert or backup power monitoring circuits - eliminates need for supercapacitor or rechargeable backup. |
| eUSCI_A0 with IrDA encoder/decoder | Permits optical communication with handheld readers or utility field devices without external transceiver IC - reduces BOM cost and board area in portable meter test equipment. |
| Integrated voltage monitor (VMONIN) | Provides programmable threshold detection on P2.3 for brownout or overvoltage events - triggers immediate firmware response to protect downstream circuitry in AC mains-connected applications. |
| Digital-controlled oscillator (DCO) | Delivers stable 16.384-MHz clock with <±1% accuracy over temperature and voltage - eliminates external crystal while maintaining precise timing for energy accumulation and pulse output generation. |
Applications
| Smart Plug Energy Monitoring | Industrial Submetering |
|---|---|
|
Use Scenario: Real-time power consumption tracking in residential smart outlets with local display and BLE/Wi-Fi gateway handoff. IC Role / Device Role / Timing Role: Primary metrology controller performing simultaneous 24-bit ADC sampling of line voltage and load current, computing active/reactive power, and generating calibrated pulse outputs. Use Value: Four SD24 channels enable concurrent measurement of hot/neutral currents and line/auxiliary voltages - eliminating external multiplexers and reducing measurement latency by >3× versus sequential sampling architectures. |
Use Scenario: DIN-rail mounted submeter for HVAC or lighting circuits in commercial buildings, reporting kWh/kVARh via RS-485 or LoRaWAN. IC Role / Device Role / Timing Role: Standalone energy measurement SoC handling analog front-end conditioning, digital filtering, tariff calculation, and serial communication protocol stack. Use Value: Integrated eUSCI_B0 I²C interface directly connects to isolated RS-485 transceivers or LoRa modem ICs - avoids external UART-to-RS485 bridge and reduces component count by 2–3 parts per node. |
| Medical Patient Monitor Sensor Hub | DC Power Supply Monitoring |
|
Use Scenario: Multi-parameter vital sign acquisition module measuring ECG, respiration, skin temperature, and SpO₂ sensor outputs in portable patient monitors. IC Role / Device Role / Timing Role: Analog signal aggregator digitizing four low-noise biopotential channels with programmable gain and 24-bit resolution before forwarding to host ARM processor. Use Value: Differential PGA inputs reject common-mode noise from electrode interfaces; 75 nA LPM4.5 mode enables >1-week battery runtime in standby between clinical measurements. |
Use Scenario: Embedded telemetry unit inside 48-V DC telecom power supplies, monitoring input/output voltage, current, temperature, and fan status. IC Role / Device Role / Timing Role: Dedicated supervisor MCU acquiring analog sensor data, executing fault logic, and communicating alerts via I²C to main PMBus controller. Use Value: On-chip voltage monitor (VMONIN) detects input undervoltage lockout conditions within 1 µs - faster than discrete comparator solutions and eliminates external window comparator ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar metrology microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430I2041TPWR | 32 KB flash, 2 KB RAM, identical ADC/peripheral set - differs only in memory size and RHB/VQFN packaging. | Preferred for firmware-intensive designs requiring bootloader space or future feature expansion; requires 32-pin layout. | Select MSP430I2041TPWR when >16 KB flash is needed for advanced metrology libraries or secure boot code - same pinout not applicable due to different package (RHB vs PW). |
| MSP430I2030TPWR | Three 24-bit SD24 ADCs (vs four), otherwise identical peripheral set, 16 KB flash, 1 KB RAM. | Suitable for cost-sensitive single-channel or dual-channel metering where neutral monitoring is omitted. | Choose MSP430I2030TPWR to reduce BOM cost by ~12% when only three analog inputs are required - maintains same 28-pin TSSOP footprint and software compatibility. |
Compared with MSP430I2040TPWR, MSP430I2041TPWR offers double the RAM and flash for complex firmware but requires a larger 32-pin VQFN package, while MSP430I2030TPWR retains the same 28-pin TSSOP form factor and reduces analog channel count by one - making it ideal for streamlined single-phase meter designs with constrained memory needs.
Availability
MSP430I2040TPWR is available at Aetrix Electronics and suitable for smart plug energy monitoring, industrial submetering, and medical sensor hub applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for certified designs.
Supply support for MSP430I2040TPWR 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 technologies with over 90 years of innovation in power management and signal chain solutions.
The MSP430I2040TPWR belongs to TI's Metrology and Monitoring MCU portfolio, engineered specifically for high-accuracy, ultra-low-power energy measurement in utility, industrial, and medical instrumentation - emphasizing integrated analog front-end precision and firmware efficiency.
FAQ
What is the maximum system clock frequency supported by the MSP430I2040TPWR?
The MSP430I2040TPWR supports a maximum system clock frequency of 16.384 MHz, generated by its internal digitally controlled oscillator (DCO). This frequency is factory-trimmed and stable across voltage (2.2–3.6 V) and temperature (–40°C to 85°C), enabling precise timing for energy accumulation and pulse output generation without external crystal components.
Does the MSP430I2040TPWR include hardware support for IrDA communication?
Yes, the MSP430I2040TPWR includes dedicated IrDA encoder and decoder logic within its eUSCI_A0 module. This allows direct implementation of IrDA SIR (Serial Infrared) physical layer communication at standard rates (up to 115.2 kbps) without external transceiver ICs - confirmed in Section 1 Features and Section 9.10 Peripherals of the SLAS887C datasheet.
How many analog input channels does the MSP430I2040TPWR support, and what is their configuration?
The MSP430I2040TPWR supports four independent 24-bit sigma-delta analog-to-digital converter (SD24) channels, each with differential PGA inputs (A0.0±, A1.0±, A2.0±, A3.0±). All four channels are fully functional in the 28-pin TSSOP package, as verified in Table 6-1 Device Comparison and Figure 7-2 pin diagram of the SLAS887C datasheet.
What is the lowest power consumption mode available on the MSP430I2040TPWR, and what is its typical current draw?
The lowest power mode is LPM4.5 (shutdown mode), which retains full RAM content while disabling all clocks and regulators except the LDO bias. At 3.0 V, its typical current draw is 75 nA - specified in Section 1 Features and validated in Section 8.5 Low-Power Mode Supply Currents of the SLAS887C datasheet.
Can the MSP430I2040TPWR operate without an external crystal or resonator?
Yes, the MSP430I2040TPWR operates fully from its internal 16.384-MHz digitally controlled oscillator (DCO) with no external timing components required. The DCO supports both internal resistor calibration and external resistor tuning (via ROSC pin), and achieves <±1% accuracy across operating conditions - eliminating crystal cost and board space in cost-sensitive metering designs.
MSP430I2040TPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Series:
- MSP430I2xx
- Packaging:
- Tape & Reel (TR)
- 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:
MSP430I2040TPWR FAQ
1.How can I place an order for MSP430I2040TPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430I2040TPWR 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 MSP430I2040TPWR reliable?
The price and inventory of MSP430I2040TPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430I2040TPWR is usually 5 days.
3.What payment methods are accepted for MSP430I2040TPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430I2040TPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430I2040TPWR?
MSP430I2040TPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430I2040TPWR 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 MSP430I2040TPWR?
For technical support, including MSP430I2040TPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430I2040TPWR requirements.
6.How does Aetrix verify that MSP430I2040TPWR is sourced from the original manufacturer or authorized distributors?
All MSP430I2040TPWR 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 MSP430I2040TPWR meets industry standards.
7.What is the process for return or replacement of MSP430I2040TPWR?
All MSP430I2040TPWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430I2040TPWR, 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 MSP430I2040TPWR part is unused and in its original packaging.
Return procedure for MSP430I2040TPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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