Texas Instruments MSP430I2021TRHBR

Overview

MSP430I2021TRHBR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring a 16-MHz CPU, integrated 24-bit sigma-delta ADC (SD24), 2 kB flash, 128 B RAM, and hardware multiplier - designed for precision sensor signal acquisition in battery-powered metering and industrial sensing applications.

For engineers reviewing the MSP430I2021TRHBR datasheet, MSP430I2021TRHBR pinout, MSP430I2021TRHBR application, or MSP430I2021TRHBR equivalent, key selection criteria include LPM4.5 sub-100-nA shutdown current, on-chip voltage monitor (VMON), DCO-based clock system with ±1% accuracy over temperature, and single-cycle 16×16 multiply capability.

Technical Context

The MSP430I2021TRHBR implements a 16-bit RISC CPU with seven addressing modes and 27 core instructions, operating from a digitally controlled oscillator (DCO) calibrated to ±1% across –40°C to 85°C. It integrates a dedicated SD24 module supporting up to 24-bit resolution at 128 SPS with programmable gain (1×–128×) and internal reference.

Power management includes Brownout Reset (BOR), Supply Voltage Supervisor (SVS), and LPM4.5 mode enabling wake-up from <100 nA with retained RAM and register state. The device uses a 32-pin QFN (RHBR) package with 24 GPIOs, all configurable for digital I/O or peripheral functions including Timer_A and WDT.

Key Specifications

Pinout & Package

Package: 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch), wettable flank, RoHS-compliant - optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power sensor MCU applications.

Compared with MSP430I2021TRHBR, the MSP430I2041TRHBR adds memory and ADC resources for expanded metrology features, while the MSP430FR2152TRSMR trades ADC resolution for FRAM endurance and faster throughput - neither is pin-compatible, requiring PCB redesign.

Availability

MSP430I2021TRHBR is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, portable instrumentation, and utility infrastructure monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for MSP430I2021TRHBR 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 over 50 years of innovation in low-power design.

The MSP430i2xx family targets ultra-low-power sensor signal acquisition, integrating precision ADCs and power-optimized MCUs for battery-operated metering and industrial sensing - not general-purpose computing.

FAQ

What is the maximum sampling rate of the SD24 module in MSP430I2021TRHBR?

The SD24 module in MSP430I2021TRHBR supports a maximum output data rate of 128 samples per second (SPS) at full 24-bit resolution. At reduced resolution (e.g., 16-bit), the rate can increase to 512 SPS. This specification is fixed by the modulator architecture and filter configuration - no oversampling or decimation settings in MSP430I2021TRHBR allow exceeding these limits.

Does MSP430I2021TRHBR support external crystal oscillators?

MSP430I2021TRHBR does not include hardware support for external crystal oscillators. Its clock system relies exclusively on the internal digitally controlled oscillator (DCO), calibrated factory-trimmed to ±1% accuracy from –40°C to 85°C. No XT1 or XT2 oscillator circuits are present - external crystals cannot be connected or used.

What is the wake-up time from LPM4.5 mode in MSP430I2021TRHBR?

Wake-up from LPM4.5 mode in MSP430I2021TRHBR occurs in less than 1 µs after interrupt assertion. The CPU resumes execution immediately upon exit, with all registers and RAM contents fully retained - no initialization or clock stabilization delay is required, enabling responsive reaction to fast sensor events.

Can MSP430I2021TRHBR perform hardware multiplication with signed operands?

Yes, MSP430I2021TRHBR's integrated hardware multiplier supports both signed and unsigned 16×16-bit multiplication, delivering the full 32-bit result in a single CPU cycle. The MPY, MPYS, and MACW instructions explicitly handle two's-complement signed operands - critical for sensor linearization and digital filtering.

Is the MSP430I2021TRHBR pinout compatible with other MSP430i2xx devices?

No, MSP430I2021TRHBR uses a unique 32-pin QFN (RHBR) pinout optimized for its specific peripheral set. While it shares the same package footprint with MSP430I2041TRHBR, pin functions differ - for example, SD24 inputs and Timer_A outputs are assigned to different pins. Direct replacement requires PCB redesign.