Texas Instruments MSP430F4351IPZ

Overview

MSP430F4351IPZ from Texas Instruments is an ultralow-power 16-bit mixed-signal microcontroller featuring 16KB+256B flash, 512B RAM, integrated LCD driver for up to 160 segments, two 16-bit timers (Timer_A3 and Timer_B3), and USART0 with UART/SPI selectable mode. It operates from 1.8 V to 3.6 V and targets battery-powered portable measurement systems requiring long runtime and on-device display.

For engineers reviewing the MSP430F4351IPZ datasheet, MSP430F4351IPZ pinout, MSP430F4351IPZ application, or MSP430F4351IPZ equivalent, key selection criteria include its 100-pin QFP package, absence of ADC12 module (distinguishing it from non-"1" variants), wake-up time under 6 µs from standby, and LCD segment drive capability across 4 backplane/40 segment lines.

Technical Context

The MSP430F4351IPZ implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling sub-6 µs wake-up from standby mode. Its peripheral set includes Timer_A3 (3 capture/compare registers), Timer_B3 (3 capture/compare registers with shadow registers), and a single USART0 configurable as UART or SPI - no ADC12 module is present per family documentation.

It supports LCD driving with four common outputs (COM0–COM3) and up to 40 segment outputs per COM line (S0–S39), using internal resistive voltage divider for bias generation. Power management includes five low-power modes, brownout detection, and supply voltage supervisor with programmable level detection.

Key Specifications

Pinout & Package

Package: 100-pin plastic quad flat pack (QFP), PZ suffix, 0.5 mm pitch, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F435IPZ, the MSP430F4351IPZ removes ADC12 to lower cost and dynamic power; compared with MSP430F4361IPZ, it offers less flash and RAM but maintains identical LCD, timer, and communication functionality for simpler designs.

Availability

MSP430F4351IPZ is available at Aetrix Electronics and suitable for hand-held meters, industrial sensor nodes, smart utility displays, and low-power data loggers requiring stable component supply and long-term production continuity.

Supply support for MSP430F4351IPZ 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 power efficiency and reliability.

The MSP430x43x1 product line targets ultralow-power portable instrumentation and display-centric embedded systems, emphasizing extended battery life, integrated LCD control, and rapid wake-up responsiveness.

FAQ

What is the key functional difference between MSP430F4351IPZ and MSP430F435IPZ?

The MSP430F4351IPZ omits the ADC12 module present in the MSP430F435IPZ. Both share identical flash (16KB+256B), RAM (512B), package (100-pin QFP), timers, USART0, LCD driver, and power characteristics. This makes MSP430F4351IPZ suitable for applications where analog-to-digital conversion is handled externally or not required, reducing cost and dynamic power consumption.

Does MSP430F4351IPZ support crystal oscillators for both low- and high-frequency operation?

Yes, MSP430F4351IPZ supports two crystal oscillators: XT1 (XIN/XOUT) accepts standard or watch crystals (e.g., 32.768 kHz) for low-frequency timing or RTC functions, while XT2 (XT2IN/XT2OUT) supports higher-frequency crystals up to 8 MHz for system clock generation via the FLL+ loop. Both are fully supported in the device's oscillator architecture.

How many LCD segments can MSP430F4351IPZ drive, and what is the maximum multiplex ratio?

The MSP430F4351IPZ drives up to 160 segments using four common outputs (COM0–COM3) and up to 40 segment outputs (S0–S39). This supports 4-mux (1:4) LCD configurations. The internal resistive divider generates LCD bias voltages, eliminating need for external resistor networks or charge pumps.

What is the wake-up time from standby mode for MSP430F4351IPZ, and which clock source enables it?

The MSP430F4351IPZ wakes up from standby mode in less than 6 µs using the digitally controlled oscillator (DCO) as the active clock source. This fast transition is enabled by the DCO's inherent stability and lack of crystal start-up delay, making it ideal for interrupt-driven sensor sampling and responsive user interfaces.

Is JTAG debugging supported on MSP430F4351IPZ, and which pins are used?

Yes, MSP430F4351IPZ includes full JTAG debugging support via dedicated pins: TCK (pin 93), TMS (pin 92), TDO/TDI (pin 90), and TDI/TCLK (pin 91). These enable boundary-scan testing, flash programming, and real-time emulation using standard TI debug tools like MSP-FET430UIF or compatible third-party adapters.