Texas Instruments MSP430FG439IPNR

Overview

MSP430FG439IPNR 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 and internal reference, dual 12-bit DACs, three configurable op-amps, two 16-bit timers (Timer_A3 and Timer_B3), integrated LCD driver for up to 128 segments, and USART supporting UART/SPI modes - deployed in portable sensor systems and handheld meters requiring extended battery life.

For engineers reviewing the MSP430FG439IPNR datasheet, MSP430FG439IPNR pinout, MSP430FG439IPNR application, or MSP430FG439IPNR equivalent, key selection criteria include its 1.8–3.6 V supply range, sub-1 µA LPM4 current, 48 GPIOs, on-chip LCD driver, and QFP-80 package compatibility with space-constrained industrial and metering designs.

Technical Context

The MSP430FG439IPNR implements a 16-bit CPU with constant generators and a digitally controlled oscillator (DCO), enabling wake-up from LPM3 in under 6 µs. Its peripheral set includes a single-channel DMA controller, hardware-based LCD segment driver with COM/SEG support, and independent clock domains (MCLK, SMCLK, ACLK) sourced from DCO, LFXT1 (32.768 kHz crystal), or XT2 (up to 8 MHz).

It integrates analog subsystems including Comparator_A, programmable SVS with adjustable trip level, and three rail-to-rail op-amps usable as PGA, filter stages, or sensor signal conditioners - all operating within the same 1.8–3.6 V supply envelope as the digital core.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (PN), body size 12 mm × 12 mm, exposed pad not specified. Pin functions validated per TI SLAS380F Rev. F (March 2022) Figure 7-1 and Section 7.2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430FG4619IPN and MSP430F5529IPN, the MSP430FG439IPNR delivers the most integrated analog+LCD solution in the 80-pin QFP footprint - making it ideal for cost-sensitive, battery-operated metering where on-chip op-amps and LCD drive eliminate four to six external components.

Availability

MSP430FG439IPNR is available at Aetrix Electronics and suitable for hand-held meters, digital thermostats, analog sensor systems, and digital motor control applications requiring stable component supply and long-term industrial availability.

Supply support for MSP430FG439IPNR 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 leadership in ultra-low-power microcontrollers.

The MSP430FG43x product line targets portable, battery-powered measurement and display applications - emphasizing integrated analog peripherals, LCD support, and sub-microamp power states to maximize operational lifetime.

FAQ

What is the maximum system clock frequency supported by the MSP430FG439IPNR?

The MSP430FG439IPNR supports a maximum system clock (MCLK) frequency of 8 MHz at 3.6 V supply, and 4.15 MHz at 1.8 V, as specified in Section 8.3 Recommended Operating Conditions. This frequency is generated by the internal DCO and stabilized via FLL+ using LFXT1 or XT2 crystals. The MSP430FG439IPNR's 16-bit RISC core executes instructions at 125 ns per cycle at full speed, enabling responsive real-time control without external clock sources.

Does the MSP430FG439IPNR support in-system programming without external hardware?

Yes, the MSP430FG439IPNR includes a factory-programmed Bootstrap Loader (BSL) that enables UART-based in-system programming with no external programming voltage required. Using the built-in USART0 in UART mode, firmware updates can be performed via P2.4/UTXD0 and P2.5/URXD0 pins - a capability confirmed in Section 1 Features and Section 9.7 of the SLAS380F datasheet. This makes the MSP430FG439IPNR suitable for field-upgradable devices like smart meters and thermostats.

How many LCD segments can the MSP430FG439IPNR drive, and what is the segment drive configuration?

The MSP430FG439IPNR drives up to 128 segments using four commons (COM0–COM3) and 32 segment outputs (S0–S31), as documented in Section 1 Features and Table 6-1 Device Comparison. It supports static, 2-, 3-, or 4-mux LCD configurations with internal bias generation - eliminating external resistors or charge pumps. The MSP430FG439IPNR's LCD module operates directly from AVCC/AVSS and supports software-controlled contrast adjustment via internal voltage dividers.

What are the key differences between the MSP430FG439IPNR and MSP430FG438IPNR?

The MSP430FG439IPNR features 60 KB Flash and 2 KB RAM, while the MSP430FG438IPNR has 48 KB Flash and same 2 KB RAM - both share identical peripherals (ADC12, DAC12, op-amps, timers, LCD, USART). The difference is strictly memory capacity; all pinouts, electrical specs, and functional behavior are identical. Therefore, MSP430FG439IPNR is selected when firmware size exceeds 48 KB or future-proofing for feature expansion is required.

Can the three operational amplifiers in the MSP430FG439IPNR be used simultaneously in independent configurations?

Yes, the MSP430FG439IPNR integrates three fully independent, rail-to-rail operational amplifiers (OA0, OA1, OA2), each with selectable input/output routing via multiplexer control registers. As confirmed in Section 1 Features and Section 7.2.1 Signal Descriptions, they can operate concurrently - for example, OA0 as transimpedance amplifier for photodiode, OA1 as buffer for ADC reference, and OA2 as comparator hysteresis stage - all powered from the same 1.8–3.6 V supply without performance degradation.