Texas Instruments MSP430F6433IZCAT

Overview

MSP430F6433IZCAT from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller featuring 128 KB Flash, 10 KB RAM, dual 12-bit DACs, a 12-bit ADC with 16 channels (12 external + 4 internal), two USCI modules (UART/IrDA/SPI/I²C), four 16-bit timers, integrated LCD driver for up to 160 segments, and RTC with battery backup - deployed in handheld meters and digital thermostats requiring extended battery life.

For engineers reviewing the MSP430F6433IZCAT datasheet, MSP430F6433IZCAT pinout, MSP430F6433IZCAT application, or MSP430F6433IZCAT equivalent, key selection criteria include its 100-pin LQFP package, 1.8–3.6 V supply range, 270 µA/MHz active current, 1.8 µA LPM3 standby, and absence of USB or DAC outputs (unlike F6438/F6436).

Technical Context

The MSP430F6433IZCAT implements a unified clock system with FLL stabilization, VLO/REFO internal oscillators, and support for 32-kHz XT1 and up to 32-MHz XT2 crystals. Its power management includes an integrated LDO with programmable core voltage and brownout detection.

It integrates six-channel DMA, hardware multiplier for 32-bit operations, and flexible I/O port mapping across 74 pins - with peripheral functions including comparator_B, CRC16, and LCD_B controller - all optimized for deterministic low-power sensor interface and timing-critical embedded control.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (PZ), 14 mm × 14 mm body size, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6436IPZ, the MSP430F6433IZCAT omits DAC outputs - reducing pin count and cost where analog actuation isn't needed. Against MSP430F5438AIPN, it trades Flash/RAM capacity for integrated LCD_B and RTC_B with battery backup - making it superior for compact, display-centric, long-life devices.

Availability

MSP430F6433IZCAT is available at Aetrix Electronics and suitable for handheld meters, digital thermostats, and analog sensor systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MSP430F6433IZCAT 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 for industrial, automotive, and consumer markets.

The MSP430F643x product line targets ultra-low-power portable measurement and sensor interface applications - emphasizing extended battery life, integrated analog peripherals, and robust real-time control in compact form factors.

FAQ

What is the maximum operating frequency of the MSP430F6433IZCAT?

The MSP430F6433IZCAT supports a system clock up to 20 MHz via its FLL-controlled DCO or external XT2 crystal. This frequency enables real-time signal processing and responsive UI updates while maintaining ultra-low power consumption in active mode - critical for battery-powered applications where performance must be balanced with energy efficiency. The device achieves 270 µA/MHz at 8 MHz and 3.0 V during Flash execution.

Does the MSP430F6433IZCAT include a hardware DAC?

No, the MSP430F6433IZCAT does not include functional DAC12_A outputs. Although the datasheet pinout shows DAC0/DAC1 labels on P6.6, P6.7, P7.6, and P7.7, Table 3-1 explicitly lists DAC12_A channel count as "–" for MSP430F6433, confirming DAC functionality is disabled in this variant. This distinguishes it from MSP430F6436 and MSP430F6438, which support two 12-bit voltage-output DACs.

What package type and pin count does the MSP430F6433IZCAT use?

The MSP430F6433IZCAT uses a 100-pin LQFP (PZ) package with 14 mm × 14 mm body size and 0.5 mm lead pitch. It provides 74 general-purpose I/O pins with configurable secondary functions, including USCI, timer, ADC, and LCD segment/com drivers - making it suitable for space-constrained designs requiring rich peripheral integration without BGA assembly complexity.

Can the MSP430F6433IZCAT operate from a single 3.0 V supply?

Yes, the MSP430F6433IZCAT operates across 1.8 V to 3.6 V, fully supporting 3.0 V nominal supply. At 3.0 V, it delivers 270 µA/MHz in active mode, 1.8 µA in LPM3 standby, and 1.1 µA in RTC-active LPM3.5 mode. Its integrated LDO regulates core voltage independently, ensuring stable CPU and peripheral operation even as battery voltage declines - ideal for single-cell Li-ion or triple-AA systems.

Is the MSP430F6433IZCAT pin-compatible with other MSP430F643x devices in the same package?

Yes, the MSP430F6433IZCAT shares identical 100-pin LQFP (PZ) pinout with MSP430F6435, MSP430F6436, and MSP430F6438. All variants use the same mechanical footprint and signal assignments per Table 4-1 and Figures 4-1/4-2 - enabling drop-in replacement in existing designs where peripheral requirements align (e.g., omitting DAC-dependent functions). Functional compatibility depends on enabled peripherals, not physical layout.