Texas Instruments MSP430FG439IPN

Overview

MSP430FG439IPN from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 60 KB Flash, 2 KB RAM, a 12-bit ADC with 12 channels, dual 12-bit DACs, three configurable op-amps, two 16-bit timers (Timer_A3 and Timer_B3), USART, DMA, LCD driver for up to 128 segments, and 48 GPIO pins - designed for battery-powered sensor systems and portable instrumentation.

For engineers reviewing the MSP430FG439IPN datasheet, MSP430FG439IPN pinout, MSP430FG439IPN application, or MSP430FG439IPN equivalent, key selection considerations include its 1.8–3.6 V supply range, sub-1 µA LPM4 current, integrated LCD driver, analog subsystem (ADC/DAC/op-amps), and QFP-80 package compatibility with legacy MSP430FG43x designs.

Technical Context

The MSP430FG439IPN implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO), enabling wake-up from LPM3 in under 6 µs. Its analog subsystem integrates a 12-bit ADC with internal reference and autoscan, dual synchronized 12-bit DAC outputs, and three programmable op-amps usable as amplifiers, comparators, or filters.

Digital peripherals include Timer_A3 (three capture/compare registers), Timer_B3 with shadow registers, a UART/SPI-capable USART0, single-channel DMA, and an on-chip LCD controller supporting static to 4-mux segment drive - all operating within five low-power modes optimized for extended battery life in portable measurement applications.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), 12 mm × 12 mm body size, exposed pad not specified, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FG439IPN, MSP430FG4619IPN offers higher memory and ADC performance in identical QFP-80 packaging, while MSP430F5529IPN trades analog integration for USB and larger memory - making the FG439 optimal for cost-sensitive, LCD-equipped, battery-powered analog sensor nodes.

Availability

MSP430FG439IPN is available at Aetrix Electronics and suitable for analog sensor systems, digital motor control, and hand-held meters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430FG439IPN 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 microcontroller innovation.

The MSP430FG43x product line was engineered for ultra-low-power portable instrumentation - integrating high-precision analog peripherals, LCD control, and robust timing into a single chip for battery-operated measurement devices.

FAQ

What is the maximum system clock frequency supported by the MSP430FG439IPN?

The MSP430FG439IPN supports a maximum MCLK frequency of 8 MHz at 3.6 V supply voltage, as specified in the Recommended Operating Conditions table. At 1.8 V, the maximum is 4.15 MHz. This DCO-derived clock enables real-time signal processing while maintaining ultra-low active-mode current of 300 µA at 1 MHz/2.2 V. The MSP430FG439IPN uses frequency-locking logic to stabilize the DCO against voltage and temperature drift.

Does the MSP430FG439IPN support external crystal oscillators?

Yes, the MSP430FG439IPN supports two independent crystal oscillators: XT1 (32.768 kHz watch crystal or 1–8 MHz crystal/resonator) and XT2 (1–8 MHz crystal/resonator). XT1 provides low-frequency ACLK for RTC and LPM3 operation; XT2 supplies high-frequency clock for SMCLK/MCLK. Both are fully integrated with internal load capacitors and require no external components for basic operation.

How many LCD segments can the MSP430FG439IPN drive, and what mux configurations are supported?

The MSP430FG439IPN drives up to 128 segments using its integrated LCD controller with software-selectable static, 2-mux, 3-mux, or 4-mux operation. It provides four COM outputs (COM0–COM3) and 32 segment outputs (S0–S31 plus S10–S23), enabling direct connection to common LCD glass types used in thermostats and handheld meters without external driver ICs.

What analog peripherals are integrated into the MSP430FG439IPN?

The MSP430FG439IPN integrates a 12-bit ADC with 12 input channels and internal reference, dual 12-bit DACs with synchronization, three configurable operational amplifiers (OA0–OA2), and a comparator module. These peripherals share analog I/O pins (e.g., P6.6 serves as DAC0 output, A6 input, and OA2I0), enabling compact analog front-end design for sensor signal conditioning and actuator control.

Is the MSP430FG439IPN pin-compatible with other devices in the MSP430FG43x family?

Yes, the MSP430FG439IPN is pin-compatible with MSP430FG438IPN and MSP430FG437IPN in the 80-pin QFP (PN) package. All share identical pin assignments, electrical characteristics, and peripheral mapping - allowing hardware reuse across variants differing only in Flash/RAM size and ADC channel count. This simplifies design scalability and inventory consolidation.