Texas Instruments MSP430G2544IRHA40R

Overview

MSP430G2544IRHA40R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller with 16KB+256B flash, 512B RAM, 10-bit 200-ksps ADC, dual 16-bit timers (Timer_A3 and Timer_B3), USCI supporting UART/LIN/IrDA/SPI/I²C, and integrated DCO clocking up to 16 MHz - deployed in battery-powered sensor nodes and RF front ends.

For engineers reviewing the MSP430G2544IRHA40R datasheet, MSP430G2544IRHA40R pinout, MSP430G2544IRHA40R application, or MSP430G2544IRHA40R equivalent, key selection criteria include active-mode current at 1 MHz (270 µA @ 2.2 V), standby current (1 µA), ADC channel count (12-channel), I/O count (32), and QFN-40 package compatibility with space-constrained PCB layouts.

Technical Context

The MSP430G2544IRHA40R implements a digitally controlled oscillator (DCO) with four factory-calibrated frequencies (1/8/12/16 MHz), supports both internal VLO and external 32-kHz crystal for ACLK, and integrates Brownout Reset (BOR) with programmable threshold. Its USCI_A0 module delivers enhanced UART with automatic baud-rate detection for LIN compliance, while USCI_B0 provides hardware SPI and I²C master/slave operation.

Power management leverages five low-power modes (LPM0–LPM4); wake-up from LPM3/LPM4 occurs in <1 µs via DCO stabilization. The ADC10 includes sample-and-hold, autoscan, and Data Transfer Controller (DTC) for autonomous data movement without CPU intervention - critical for deterministic sensor acquisition.

Key Specifications

Pinout & Package

Package: 40-pin QFN (RHA), 6 mm × 6 mm, exposed thermal pad (to be connected to DVSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2544IRHA40R, the G2444 offers lower memory at identical power/performance; the G2553 trades I²C capability for extra RAM - making MSP430G2544IRHA40R optimal for I²C-based sensor hubs requiring balanced flash/RAM and full USCI feature set.

Availability

MSP430G2544IRHA40R is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial process monitors, and portable medical devices requiring stable component supply across long-lifecycle production programs.

Supply support for MSP430G2544IRHA40R 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 solutions with emphasis on energy efficiency and system integration.

The MSP430G2x44 product line targets ultra-low-power sensing and measurement applications - designed to maximize battery life while integrating essential analog and digital peripherals in compact packages.

FAQ

What is the maximum operating frequency of the MSP430G2544IRHA40R?

The MSP430G2544IRHA40R supports a maximum MCLK frequency of 16 MHz when VCC ≥3.3 V and duty cycle is 50% ±10%. This is achieved using the factory-calibrated DCO; external crystals up to 16 MHz are also supported in HF mode. The CPU executes instructions at this clock rate with 62.5-ns cycle time, enabling real-time response in time-critical sensor tasks.

Does the MSP430G2544IRHA40R support hardware I²C communication?

Yes, the MSP430G2544IRHA40R supports hardware I²C via USCI_B0 module, configured as master or slave. Pin P3.1 serves as SDA and P3.2 as SCL. The module handles clock stretching, arbitration, and 7-/10-bit addressing per I²C specification - eliminating software bit-banging overhead and ensuring reliable communication with sensors like TMP102 or BME280.

How many ADC input channels does the MSP430G2544IRHA40R have, and what is their resolution?

The MSP430G2544IRHA40R features a 10-bit ADC10 module with 12 selectable analog input channels (A0–A7, A12–A15). It achieves 200-ksps sampling rate with integrated sample-and-hold and reference generator. Channel selection is programmable via ADC10CTL1, and autoscan mode allows sequential conversion of up to 16 values without CPU intervention - ideal for multi-sensor data acquisition.

What low-power modes are available on the MSP430G2544IRHA40R, and what is the lowest current draw?

The MSP430G2544IRHA40R offers five low-power modes (LPM0–LPM4). The lowest current is 0.1 µA in LPM4 (RAM retention only, all clocks disabled), verified at 2.2 V and 25°C. LPM3 draws 1 µA with ACLK active from 32-kHz crystal - suitable for RTC-backed wake-up events. All modes retain RAM content and support fast wake-up (<1 µs from LPM3/LPM4), critical for duty-cycled IoT endpoints.

Is the MSP430G2544IRHA40R pin-compatible with other devices in the MSP430G2x44 family?

Yes, the MSP430G2544IRHA40R shares identical 40-pin QFN (RHA) pinout with MSP430G2444IRHA40R and MSP430G2744IRHA40R. All three variants maintain consistent signal mapping for power, ground, I/O, USCI, timer, ADC, and debug pins - enabling hardware reuse across memory-tier variants and simplifying design migration or BOM optimization.