Texas Instruments MSP430G2444IRHA40T

Overview

MSP430G2444IRHA40T from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8KB flash, 512B RAM, a 10-bit 200-ksps ADC with internal reference and data transfer controller, two 16-bit timers (Timer_A3 and Timer_B3), and a universal serial communication interface (USCI) supporting UART/LIN, IrDA, SPI, and I²C. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and RF front ends.

For engineers reviewing the MSP430G2444IRHA40T datasheet, MSP430G2444IRHA40T pinout, MSP430G2444IRHA40T application, or MSP430G2444IRHA40T equivalent, key selection criteria include its 40-pin QFN (RHA) package, calibrated DCO up to 16 MHz, 32 I/O pins with Schmitt-trigger inputs, brownout detection, and Spy-Bi-Wire debug interface - all critical for low-power embedded design validation and layout integration.

Technical Context

The MSP430G2444IRHA40T implements a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (1/8/12/16 MHz), enabling sub-1-µs wake-up from LPM3/LPM4. Its USCI module supports simultaneous UART (with auto-baud detection), SPI (master/slave), and I²C modes on shared pins, while the ADC10 integrates autoscan, internal voltage reference (1.5 V), and DTC for autonomous conversions without CPU intervention.

Power management leverages five low-power modes: LPM0–LPM4, with current draw as low as 0.1 µA in LPM4 (RAM retention). Clock system flexibility includes internal VLO (12 kHz), 32-kHz crystal (LFXT1), external HF crystal (up to 16 MHz), resonator, or resistor-tuned DCO - all selectable via BCSCTL registers without external components.

Key Specifications

Pinout & Package

VQFN-40 (RHA) package: 6 mm × 6 mm, 0.5-mm pitch, exposed thermal pad (connected to DVSS). Pin 1 marked by top-side dot; pin numbering follows standard QFN counterclockwise sequence starting from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2544IRHA40T, the MSP430G2444IRHA40T offers identical low-power performance and peripheral set at lower memory cost; versus MSP430FR2443IPW20R, it provides superior analog integration and I/O count but lacks FRAM's write endurance - making it optimal for cost-sensitive, analog-rich sensor endpoints.

Availability

MSP430G2444IRHA40T is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial condition monitoring systems, and smart utility meter interfaces requiring stable component supply and long-term production continuity.

Supply support for MSP430G2444IRHA40T 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 90 years of innovation in energy-efficient electronics.

The MSP430G2x44 product line was designed specifically for ultra-low-power mixed-signal applications where extended battery life, integrated analog peripherals, and compact footprint are essential - targeting sensor systems and RF front ends.

FAQ

What is the maximum operating frequency of the MSP430G2444IRHA40T?

The MSP430G2444IRHA40T supports a maximum system clock (MCLK) frequency of 16 MHz, achieved using the factory-calibrated digitally controlled oscillator (DCO) at VCC ≥ 3.3 V. This frequency is fully operational across the recommended temperature range (-40°C to 85°C) and enables real-time processing of sensor data and communication protocols without external clock sources.

Does the MSP430G2444IRHA40T include an internal voltage reference for the ADC?

Yes, the MSP430G2444IRHA40T integrates an internal 1.5-V reference for the ADC10 module, eliminating the need for external reference components. This reference is stable across temperature and supply voltage variations and can be selected via ADC10CTL0 register settings. It supports both single-ended and differential ADC conversions with typical accuracy of ±1% over the operating range.

How many I/O pins does the MSP430G2444IRHA40T provide in the RHA package?

The MSP430G2444IRHA40T in the 40-pin QFN (RHA) package provides 32 general-purpose digital I/O pins distributed across Ports P1–P4. All pins feature programmable pullup/pulldown resistors and Schmitt-trigger inputs, enabling robust interfacing with switches, sensors, LEDs, and digital peripherals without external conditioning circuitry.

Can the MSP430G2444IRHA40T be programmed in-system without external hardware?

Yes, the MSP430G2444IRHA40T supports in-system programming via its built-in bootstrap loader (BSL), accessible through UART using only P1.1 (UCA0RXD) and P1.2 (UCA0TXD). No external programmer or JTAG interface is required - firmware updates can be performed directly over a serial connection using TI's BSL script utilities or custom host software.

What low-power modes are supported by the MSP430G2444IRHA40T and what is the lowest current draw?

The MSP430G2444IRHA40T supports five low-power modes (LPM0–LPM4). The lowest current draw is 0.1 µA in LPM4 (RAM retention only) at 2.2 V and 25°C. In LPM3 (real-time clock active), current is 1 µA with LFXT1 or 0.5 µA with internal VLO - enabling decade-scale battery life in intermittently active sensor applications.