Texas Instruments MSP430F2122IRHBT

Overview

MSP430F2122IRHBT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 4KB+256B flash, 512B RAM, a 10-bit 200-ksps ADC with internal reference and DTC, two 16-bit timers (Timer0_A3 with three capture/compare registers, Timer1_A2 with two), USCI_A0 (UART/LIN/IrDA/SPI) and USCI_B0 (SPI/I²C), and comparator_A+. It targets battery-powered sensor nodes and portable instrumentation requiring sub-µA standby operation.

For engineers reviewing the MSP430F2122IRHBT datasheet, MSP430F2122IRHBT pinout, MSP430F2122IRHBT application, or MSP430F2122IRHBT equivalent, key selection criteria include its 0.7 µA standby current, 250 µA active current at 1 MHz/2.2 V, integrated LIN-capable UART, 24 I/O pins in 32-pin QFN, and calibrated DCO enabling <1 µs wake-up from LPM3.

Technical Context

The MSP430F2122IRHBT implements a 16-bit RISC CPU with seven addressing modes and constant generators for high code efficiency. Its clock system integrates a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (±1%), a 32-kHz crystal oscillator input, and support for external HF crystals up to 16 MHz or resistor-based DCO tuning.

Peripherals are memory-mapped and accessible via all CPU instructions. The USCI modules provide protocol-flexible serial communication: USCI_A0 supports asynchronous UART with auto-baudrate detection (LIN), IrDA encoding/decoding, and synchronous SPI; USCI_B0 supports synchronous SPI and I²C master/slave operation.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad (connected to DVSS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power mixed-signal microcontroller applications.

Compared with MSP430F2122IRHBT, MSP430F2132IRHBT offers seamless flash scalability while retaining identical low-power behavior and peripheral set, whereas MSP430G2553IPW28 trades LIN capability and DCO accuracy for lower package cost and higher flash density in a smaller footprint.

Availability

MSP430F2122IRHBT is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical instruments, industrial control panels, and energy harvesting IoT endpoints requiring stable component supply across extended production lifecycles.

Supply support for MSP430F2122IRHBT 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 microcontroller innovation.

The MSP430F21x2 product line delivers ultra-low-power mixed-signal control for battery-operated measurement and sensing applications - emphasizing sub-µA sleep, fast wake-up, and integrated analog peripherals to minimize external components.

FAQ

What is the maximum operating frequency of the MSP430F2122IRHBT?

The MSP430F2122IRHBT supports a maximum system clock (MCLK) frequency of 16 MHz, achieved using the internal digitally controlled oscillator (DCO) with factory calibration or an external HF crystal up to 16 MHz. This allows deterministic 62.5-ns instruction execution in active mode while maintaining ultra-low power consumption.

Does the MSP430F2122IRHBT support LIN bus communication?

Yes, the MSP430F2122IRHBT supports LIN bus communication through its USCI_A0 module, which implements enhanced UART with automatic baudrate detection per ISO 9141-2. This enables direct connection to LIN transceivers without external protocol translation, making it suitable for automotive body electronics and industrial sub-networks.

How many I/O pins does the MSP430F2122IRHBT provide in the RHB package?

The MSP430F2122IRHBT in the 32-pin QFN (RHB) package provides up to 24 usable digital I/O pins across Ports P1 (8 pins), P2 (8 pins), and P3 (8 pins), with all pins individually configurable for input/output, interrupt triggering, and programmable pullup/pulldown resistors - matching the device's functional pinout specification.

What is the purpose of the DTC (Data Transfer Controller) in the MSP430F2122IRHBT?

The DTC in the MSP430F2122IRHBT autonomously transfers ADC10 conversion results to memory without CPU intervention. It supports autoscan across up to eight channels and can chain multiple transfers, enabling continuous background analog monitoring while the CPU remains in low-power mode - critical for battery lifetime optimization.

Can the MSP430F2122IRHBT operate from a single 1.8-V supply?

Yes, the MSP430F2122IRHBT operates across a supply voltage range of 1.8 V to 3.6 V. At 1.8 V, it maintains full functionality including flash programming, ADC operation, and USCI communication - enabling direct integration with low-voltage energy harvesting circuits or single-cell lithium polymer batteries without regulation.