Texas Instruments MSP430F6433IPZ

Overview

MSP430F6433IPZ from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with 128 KB flash, 10 KB RAM, integrated 3.3-V LDO, 12-bit ADC (200 ksps, 16 channels), dual 12-bit DACs, RTC with battery backup, LCD driver (160 segments), four 16-bit timers, two USCI modules (UART/IrDA/SPI/I²C), and 74 GPIO pins - deployed in battery-powered sensor systems and handheld meters.

For engineers reviewing the MSP430F6433IPZ datasheet, MSP430F6433IPZ pinout, MSP430F6433IPZ application, or MSP430F6433IPZ equivalent, key selection criteria include standby current (1.8 µA at 3.0 V), wake-up time (3 µs), ADC resolution and channel count, LCD segment drive capability, and LQFP-100 package compatibility for space-constrained embedded designs.

Technical Context

The MSP430F6433IPZ implements a unified clock system with FLL stabilization, VLO and REFO internal sources, XT1 (32 kHz crystal), and XT2 (up to 32 MHz), enabling precise timing across low-power and high-performance modes. Its power-management subsystem integrates a programmable LDO core regulator, supply-voltage supervision, brownout detection, and five low-power modes (LPM0–LPM4.5).

Peripherals are tightly coupled via a 6-channel DMA controller and shared memory-mapped registers; the CPUXV2 core supports constant generators for optimized code density, while the hardware multiplier accelerates 32-bit arithmetic critical for sensor signal processing and real-time control loops.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 100-pin quad flat pack compliant with JEDEC MO-137, 0.5-mm pitch, 14 mm × 14 mm body size, and standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6436IPZ and MSP430F6435IPZ, the MSP430F6433IPZ delivers the lowest BOM cost for applications needing ≤10 KB RAM and no DAC outputs, while retaining identical peripheral set, pinout, and ultra-low-power performance - making it the most economical choice for volume production of basic sensor nodes and meters.

Availability

MSP430F6433IPZ is available at Aetrix Electronics and suitable for smart thermostat control, handheld digital multimeter design, remote industrial sensor node deployment, and portable medical pulse oximeter development requiring stable component supply and long-term lifecycle assurance.

Supply support for MSP430F6433IPZ 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 90 years of innovation in power efficiency and signal integrity.

The MSP430F643x product line was engineered for ultra-low-power, battery-operated measurement and control applications - emphasizing extended runtime, integrated analog peripherals, and robust real-time operation in harsh environments.

FAQ

What is the maximum operating frequency of the MSP430F6433IPZ?

The MSP430F6433IPZ supports a maximum system clock frequency of 20 MHz, achieved via its digitally controlled oscillator (DCO) with FLL stabilization or external high-frequency crystal (XT2) up to 32 MHz. This enables real-time execution of sensor fusion algorithms and communication protocols while maintaining sub-µA standby current in LPM3 mode. The MSP430F6433IPZ achieves this performance within its 1.8–3.6 V supply range and specified thermal limits.

Does the MSP430F6433IPZ include an integrated LCD driver?

Yes, the MSP430F6433IPZ integrates an LCD_B module capable of driving up to 160 segments with software-configurable bias, frame frequency, and contrast control. It supports static, 2-, 3-, and 4-mux configurations and operates directly from the internal LDO output, eliminating external bias generators. This feature is fully functional on the MSP430F6433IPZ in LQFP-100 packaging and requires no additional external components for basic segment driving.

What are the low-power modes supported by the MSP430F6433IPZ?

The MSP430F6433IPZ supports five low-power modes: LPM0 (CPU off, MCLK disabled), LPM1 (DCO disabled), LPM3 (DCO and FLL disabled, VLO active), LPM3.5 (RTC active, core powered down), and LPM4.5 (full shutdown, 0.3 µA). Each mode retains specific peripheral functionality - for example, LPM3 maintains RAM and RTC operation with 1.8 µA consumption at 3.0 V. These modes are accessible via the SR register and managed by the MSP430F6433IPZ's power-management module.

Can the MSP430F6433IPZ operate from a single 3.3-V supply?

Yes, the MSP430F6433IPZ is designed to operate from a single 3.3-V supply applied to DVCC and AVCC rails. Its integrated LDO regulates the core voltage (VCORE) from this input, supporting programmable settings of 1.8 V, 2.0 V, or 2.2 V to optimize active-mode current versus performance. All I/Os are 3.3-V tolerant, and the device meets recommended operating conditions across 1.8–3.6 V - making the MSP430F6433IPZ compatible with standard 3.3-V system rails without level-shifting.

Is the MSP430F6433IPZ pin-compatible with other devices in the MSP430F643x family?

Yes, the MSP430F6433IPZ is pin-compatible with MSP430F6436IPZ, MSP430F6435IPZ, and MSP430F6438IPZ in the LQFP-100 (PZ) package. All share identical pin functions, electrical characteristics, and mechanical footprint - allowing direct substitution in existing PCB layouts. Differences are limited to internal resources (flash/RAM size, DAC presence), meaning firmware must be validated for resource constraints, but no hardware changes are needed when migrating to or from the MSP430F6433IPZ.