Texas Instruments MSP430F439IPN

Overview

MSP430F439IPN from Texas Instruments is a 16-bit RISC ultralow-power mixed-signal microcontroller featuring 60KB+256B flash memory, 2KB RAM, integrated 12-bit ADC with internal reference, LCD driver for up to 128 segments, and dual 16-bit timers (Timer_A3 and Timer_B3) - deployed in battery-powered portable measurement systems requiring long runtime and analog front-end integration.

For engineers reviewing the MSP430F439IPN datasheet, MSP430F439IPN pinout, MSP430F439IPN application, or MSP430F439IPN equivalent, key selection criteria include flash size differentiation vs. MSP430F438IPN, QFP-80 package compatibility, LCD segment drive capability, and low-power mode wake-up timing under 6 µs.

Technical Context

The MSP430F439IPN implements a digitally controlled oscillator (DCO) stabilized by an FLL+ module, enabling sub-6 µs wake-up from LPM4 using ACLK sourced from a 32.768 kHz crystal. Its 16-bit CPU executes instructions in one cycle with seven addressing modes and constant generators for optimized code density.

Peripherals are memory-mapped and accessible via full instruction set support: the single-channel DMA moves ADC12 results without CPU intervention; USART0 supports software-selectable UART or SPI; and the LCD controller natively drives static/2–4-MUX displays using dedicated segment/common outputs and internal resistive divider circuitry supplied by AVCC/AVSS.

Key Specifications

Pinout & Package

Package: 80-pin plastic quad flat pack (QFP), PN variant, rated for –40°C to +85°C operation. Pinout validated per SLAS713 (June 2010) functional terminal listing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F439IPN, MSP430F438IPN offers identical architecture and LCD capability at lower flash density, while MSP430F5328IPN trades integrated LCD drive for expanded memory and communication options - making MSP430F439IPN optimal for display-integrated, ultra-low-power embedded metering.

Availability

MSP430F439IPN is available at Aetrix Electronics and suitable for portable handheld meters, digital thermostats, remote sensor nodes, and precision timing instruments requiring stable component supply across extended product lifecycles.

Supply support for MSP430F439IPN 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 broad industrial and automotive design-in presence.

The MSP430F439IPN belongs to the MSP430x4xx family - designed specifically for ultralow-power, mixed-signal applications where extended battery life, integrated analog peripherals, and LCD interface are critical requirements.

FAQ

What is the maximum flash memory size supported by the MSP430F439IPN?

The MSP430F439IPN integrates 60KB of main flash memory plus 256B of information memory, confirmed in the SLAS713 datasheet memory organization table. This exceeds the 48KB flash in the pin-compatible MSP430F438IPN and supports larger firmware images with calibration data, communication stacks, or user interfaces - all accessible via standard MSP430 flash programming protocols including JTAG and BSL.

Does the MSP430F439IPN support LCD driving without external components?

Yes, the MSP430F439IPN includes a fully integrated LCD driver capable of driving up to 128 segments across static, 2-MUX, 3-MUX, or 4-MUX configurations using internal resistive voltage dividers. It requires only AVCC/AVSS supply rails and direct connection to LCD segment/common pins - no external bias generator or driver IC is needed, reducing bill-of-materials cost and board space in display-based applications.

How does the MSP430F439IPN achieve sub-6 µs wake-up from low-power mode?

The MSP430F439IPN achieves wake-up in less than 6 µs from LPM4 using its internal digitally controlled oscillator (DCO), which stabilizes rapidly without waiting for crystal startup. The FLL+ module locks the DCO to ACLK (32.768 kHz crystal) and scales it to required system frequencies - enabling immediate CPU execution upon interrupt, critical for responsive sensor polling or real-time control loops in battery-constrained devices.

Can the MSP430F439IPN be programmed in-system without a JTAG debugger?

Yes, the MSP430F439IPN includes a factory-programmed bootstrap loader (BSL) that enables UART-based in-system programming using pins P1.0 (TXD) and P1.1 (RXD). This allows firmware updates in the field or during production without dedicated JTAG hardware - provided the BSL password is known and the device security fuse remains unblown, preserving access to the BSL interface.

What are the key differences between Timer_A3 and Timer_B3 in the MSP430F439IPN?

Timer_A3 provides three capture/compare registers with standard output modes, while Timer_B3 adds shadow registers for synchronized compare value updates - preventing glitches during PWM duty cycle changes. Both support capture, compare, and interval timing, but Timer_B3's shadow register architecture makes it preferable for high-reliability motor control or audio waveform generation where timing consistency is critical, whereas Timer_A3 suits general-purpose timing and input capture tasks.