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Texas Instruments MSP430I2021TRHBT
- Part No.:
- MSP430I2021TRHBT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MSP430I2021TRHBT.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 32VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MSP430I2021TRHBT from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller optimized for precision energy metering and sensor monitoring. It integrates two 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 eUSCI_A (UART/IrDA/SPI) and eUSCI_B (SPI/I²C) interfaces - enabling high-accuracy current/voltage sampling in smart power strips and submetering hardware.
For engineers reviewing the MSP430I2021TRHBT datasheet, MSP430I2021TRHBT pinout, MSP430I2021TRHBT application, or MSP430I2021TRHBT equivalent, key selection criteria include its dual 24-bit SD24 ADC capability, 32-pin VQFN (RHB) package with analog input pin mapping, LPM4.5 shutdown current of 75 nA, and compatibility with TI's Energy Measurement Design Center software framework.
Technical Context
The MSP430I2021TRHBT implements a 16-bit RISC CPU with constant generators and five low-power modes (LPM0–LPM4.5), achieving wake-up from standby in 1 µs. Its analog subsystem centers on two independent 24-bit sigma-delta ADCs (SD24), each supporting programmable gain (1×/2×/4×/8×/16×/32×/64×), differential inputs, and internal/external reference selection.
Digital peripherals include two 16-bit Timer_A modules (each with three capture/compare registers), a hardware multiplier for 16×16 operations, integrated LDO delivering 1.8-V core voltage, and dual eUSCI modules - one supporting UART with auto-baud detection and IrDA, the other supporting SPI and I²C master/slave operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPU with constant generators; enables compact, efficient firmware for metering algorithms. |
| ADC Resolution & Count | Two independent 24-bit sigma-delta ADCs; supports simultaneous high-precision current and voltage measurement in single-phase AC/DC systems. |
| Supply Voltage Range | 2.2 V to 3.6 V; compatible with standard Li-ion, coin-cell, and regulated 3.3-V rails in portable metering devices. |
| Low-Power Modes | LPM4.5 draws 75 nA at 3.0 V; enables multi-year battery life in always-on submetering endpoints. |
| Communication Interfaces | eUSCI_A0 (UART/IrDA/SPI) + eUSCI_B0 (SPI/I²C); provides flexible host connectivity without external level shifters or transceivers. |
| Package & Pin Count | 32-pin VQFN (RHB), 5 mm × 5 mm; includes dedicated analog input pins (A0.0±, A1.0±) and thermal pad tied to DVSS for stable ADC performance. |
| System Clock Source | 16.384-MHz internal digitally controlled oscillator (DCO); eliminates need for external crystal while maintaining timing accuracy for metrology sampling. |
Pinout & Package
Package: 32-pin VQFN (RHB), 5 mm × 5 mm, with exposed thermal pad recommended to be connected to DVSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0.0+, A0.0− | SD24 Analog Input Pair | Differential input channel 0 for first 24-bit sigma-delta ADC; supports PGA gain up to 64× for low-level sensor signals. |
| A1.0+, A1.0− | SD24 Analog Input Pair | Differential input channel 1 for second 24-bit sigma-delta ADC; isolated from A0 path for concurrent dual-channel sampling. |
| VREF | External Reference Input | Accepts external precision reference (e.g., REF3030) when SD24REFS = 0; bypassed internally when using internal 1.2-V reference. |
| RST/NMI/SBWTDIO | Reset / NMI / Debug I/O | Multi-function pin for cold reset, non-maskable interrupt, and Spy-Bi-Wire programming/debug interface - no external programmer voltage required. |
| P1.0–P1.7, P2.0–P2.7 | General-Purpose I/O | 16 total GPIOs; multiplexed with timer capture/compare, eUSCI signals, and clock outputs - configurable per application needs. |
| ROSC | DCO Resistor Connection | Connects external resistor to AVSS to set DCO frequency; tied to AVSS for internal-resistor mode (default factory calibration). |
Key Features
| Feature | Design Value |
|---|---|
| Dual 24-bit SD24 ADCs | Enables simultaneous high-resolution current and voltage measurement with <10 ppm linearity error - critical for Class 0.5/1.0 electricity meters. |
| Ultra-Low Shutdown Current | 75 nA in LPM4.5 mode allows battery-powered devices to retain RAM state for years without recharge or replacement. |
| Integrated LDO Core Regulator | On-chip 1.8-V LDO supplies stable core voltage independent of VCC fluctuations - improves ADC PSRR and timing consistency. |
| eUSCI_A with Auto-Baud UART | Eliminates need for external baud-rate configuration logic; adapts to host UART speed dynamically - simplifies field firmware updates. |
| Hardware Multiplier (16×16) | Accelerates RMS, harmonic, and energy calculation routines in firmware - reduces CPU load and active-mode time during metrology processing. |
Applications
| Smart Power Strip Monitoring | Single-Phase Submetering |
|---|---|
|
Use Scenario: Real-time per-outlet power consumption tracking in residential/commercial smart power strips. IC Role / Device Role / Timing Role: MSP430I2021TRHBT performs synchronized voltage/current sampling via dual SD24 ADCs and computes active/reactive energy using hardware multiplier-assisted firmware. Use Value: Achieves ±0.5% energy accuracy over temperature with no external op-amps or reference ICs - reducing BOM cost and PCB area. |
Use Scenario: Retrofit submetering units installed downstream of main utility meter to allocate energy usage across tenants or departments. IC Role / Device Role / Timing Role: MSP430I2021TRHBT acts as metrology engine and communication node, sampling at 8 kSPS and reporting via UART to gateway. Use Value: LPM4.5 current of 75 nA enables >10-year battery life in maintenance-free deployments - eliminating service calls. |
| Industrial Sensor Node | Medical Patient Monitor |
|
Use Scenario: Battery-powered industrial sensor aggregating temperature, pressure, and current draw in HVAC or motor control cabinets. IC Role / Device Role / Timing Role: MSP430I2021TRHBT conditions analog sensor outputs, runs local diagnostics, and transmits alerts via I²C to host controller. Use Value: Dual SD24 ADCs support ratiometric measurements against internal 1.2-V reference - removing need for external precision references. |
Use Scenario: Portable multi-parameter patient monitor measuring ECG, respiration, and SpO₂ in point-of-care settings. IC Role / Device Role / Timing Role: MSP430I2021TRHBT acquires biopotential signals with high CMRR using differential SD24 inputs and low-noise PGA stages. Use Value: 24-bit resolution and programmable gain enable detection of microvolt-level bio-signals without external instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430I2031TRHBT | Includes three 24-bit SD24 ADCs (vs. two), same package, identical peripherals and power specs. | Required when third independent analog channel is needed - e.g., for neutral current sensing in split-phase systems. | Select MSP430I2031TRHBT only if additional ADC channel justifies higher cost and firmware complexity. |
| MSP430I2020TRHBT | Same dual-SD24 architecture but with 16 KB flash / 1 KB RAM (vs. 32 KB / 2 KB); otherwise pin- and code-compatible. | Suitable for simpler metering firmware with smaller memory footprint - e.g., basic kWh accumulation without harmonic analysis. | Choose MSP430I2020TRHBT for cost-sensitive designs where full 32-KB flash capacity is unused. |
Compared with MSP430I2021TRHBT, MSP430I2031TRHBT adds one ADC channel for expanded analog sensing, while MSP430I2020TRHBT reduces memory to lower unit cost - both maintain identical VQFN-32 packaging, low-power behavior, and peripheral feature set.
Availability
MSP430I2021TRHBT is available at Aetrix Electronics and suitable for smart power strip monitoring, single-phase submetering, and industrial sensor node applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MSP430I2021TRHBT 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 focused on analog, embedded processing, and connectivity technologies - serving industrial, automotive, and consumer markets with high-reliability silicon and comprehensive design ecosystems.
The MSP430I2021TRHBT belongs to TI's Metrology and Monitoring MCU portfolio, designed specifically for high-accuracy, ultra-low-power energy measurement in battery-operated and AC-powered metering systems.
FAQ
What is the maximum sampling rate supported by the SD24 ADCs in MSP430I2021TRHBT?
The MSP430I2021TRHBT's two 24-bit sigma-delta ADCs support up to 8 kSPS per channel with oversampling and digital filtering enabled. This rate is sufficient for Class 0.5 electricity metering standards and real-time harmonic analysis up to the 40th order when combined with the hardware multiplier and 16.384-MHz DCO clock.
Does MSP430I2021TRHBT require an external crystal for accurate timekeeping?
No, MSP430I2021TRHBT does not require an external crystal. It features a factory-trimmed 16.384-MHz internal digitally controlled oscillator (DCO) that achieves ±1% accuracy over temperature and voltage - adequate for metrology sampling clocks and UART baud generation without added components.
How many analog input channels does MSP430I2021TRHBT support?
MSP430I2021TRHBT supports two fully independent differential analog input channels (A0.0± and A1.0±), each routed to a dedicated 24-bit sigma-delta ADC. Unused analog pins (A2.0±, A3.0±) are NC on this variant and must be tied to AVSS per TI's pin connection guidelines.
Can MSP430I2021TRHBT operate from a single 3.3-V supply?
Yes, MSP430I2021TRHBT operates across 2.2 V to 3.6 V, making it fully compatible with standard 3.3-V LDOs or DC-DC converters. Its integrated 1.8-V LDO supplies the core, while analog and digital I/O remain referenced to VCC - ensuring robust operation without external voltage translation.
Is MSP430I2021TRHBT pin-compatible with other devices in the MSP430I20xx family?
Yes, MSP430I2021TRHBT shares identical 32-pin VQFN (RHB) mechanical footprint and pinout with MSP430I2031TRHBT and MSP430I2041TRHBT. Firmware and hardware designs can scale across the family by selecting variants with more ADCs or flash - without PCB revision.
MSP430I2021TRHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 32-VFQFN Exposed Pad
- 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:
- 16
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 3.6V
- Data Converters:
- A/D 2x24b Sigma-Delta
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430I2021TRHBT FAQ
1.How can I place an order for MSP430I2021TRHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430I2021TRHBT 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 MSP430I2021TRHBT reliable?
The price and inventory of MSP430I2021TRHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430I2021TRHBT is usually 5 days.
3.What payment methods are accepted for MSP430I2021TRHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430I2021TRHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430I2021TRHBT?
MSP430I2021TRHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430I2021TRHBT 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 MSP430I2021TRHBT?
For technical support, including MSP430I2021TRHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430I2021TRHBT requirements.
6.How does Aetrix verify that MSP430I2021TRHBT is sourced from the original manufacturer or authorized distributors?
All MSP430I2021TRHBT 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 MSP430I2021TRHBT meets industry standards.
7.What is the process for return or replacement of MSP430I2021TRHBT?
All MSP430I2021TRHBT units undergo pre-shipment inspection (PSI). If there is an issue with MSP430I2021TRHBT, 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 MSP430I2021TRHBT part is unused and in its original packaging.
Return procedure for MSP430I2021TRHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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