Texas Instruments MSP430F6634IZQWT

Overview

MSP430F6634IZQWT from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 192 KB flash, 16 KB + 2 KB RAM, full-speed USB 2.0 interface, dual 12-bit DACs, 12-bit ADC with 16 channels (12 external, 4 internal), integrated LCD driver for up to 160 segments, and four 16-bit timers - deployed in battery-powered metering and portable sensor systems requiring precise analog integration and USB connectivity.

For engineers reviewing the MSP430F6634IZQWT datasheet, MSP430F6634IZQWT pinout, MSP430F6634IZQWT application, or MSP430F6634IZQWT equivalent, key selection criteria include USB PHY integration, RTC with battery backup, low-power LPM3.5 mode (1.1 µA), 74 GPIO count, and ZQW 113-pin BGA package compatibility with space-constrained industrial UI designs.

Technical Context

The MSP430F6634IZQWT implements a unified clock system with FLL stabilization, dual crystal support (XT1 for 32-kHz RTC, XT2 up to 32 MHz), and internal VLO/REFO sources - enabling flexible clock domain partitioning across USB, ADC, and real-time subsystems. Its power management includes an integrated LDO with programmable core voltage and supply supervision with brownout detection.

Peripherals are tightly synchronized via a 6-channel DMA controller and shared bus architecture: USB endpoints (8 IN/8 OUT) operate independently of CPU cycles, while the 12-bit ADC supports autoscan across 16 channels with internal reference options (1.5 V/2.0 V/2.5 V) and sample rates up to 200 ksps - all while maintaining <1.8 µA standby current at 3.0 V.

Key Specifications

Pinout & Package

Package: 113-pin ZQW BGA (7 mm × 7 mm, 0.5-mm pitch), thermally enhanced for high-density PCB layouts in portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6635IZQWT and MSP430F6633IZQWT, the MSP430F6634IZQWT delivers optimal balance of flash density (192 KB), USB-enabled connectivity, and ultra-low-power analog integration - making it ideal for mid-complexity portable instrumentation where memory scalability and BOM efficiency are both critical.

Availability

MSP430F6634IZQWT is available at Aetrix Electronics and suitable for energy metering, portable medical sensors, industrial remote controls, and smart thermostat UIs requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade traceability.

Supply support for MSP430F6634IZQWT 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 wireless connectivity solutions with emphasis on power efficiency, reliability, and system-level integration.

The MSP430F663x product line targets ultra-low-power portable instrumentation and metering applications - combining high-precision analog peripherals, USB connectivity, and RTC-backed timing in a single-chip solution for battery-operated devices.

FAQ

What is the maximum system clock frequency supported by the MSP430F6634IZQWT?

The MSP430F6634IZQWT supports a maximum system clock frequency of 20 MHz. This is achieved using the integrated digitally controlled oscillator (DCO) stabilized by the FLL loop, or via external high-frequency crystals up to 32 MHz on XT2. The 20-MHz limit applies to CPU execution speed and peripheral timing domains including USB (which derives 48 MHz from FLL multiplication). All timing specifications in the datasheet assume operation within this validated frequency range.

Does the MSP430F6634IZQWT include an integrated USB physical layer?

Yes, the MSP430F6634IZQWT includes a fully integrated USB 2.0 full-speed physical layer (PHY), eliminating the need for an external transceiver. It provides dedicated DP and DM pins (PU.0/DP and PU.1/DM), integrated 3.3-V and 1.8-V USB power regulation, and a USB-PLL for clock generation. This allows direct connection to a USB host with only passive ESD protection components required - a key differentiator for compact, certified USB device designs.

How many analog input channels does the 12-bit ADC in the MSP430F6634IZQWT support?

The 12-bit ADC (ADC12_A) in the MSP430F6634IZQWT supports 16 total input channels: 12 external analog inputs (A0–A11) and 4 internal sources (temperature sensor, VCC/2, VeREF+, and VMID). Channel selection is managed via the ADC12MCTLx registers, and autoscan mode allows sequential conversion across any defined subset without CPU intervention - enabling efficient sensor array polling in portable instruments.

What is the standby current consumption of the MSP430F6634IZQWT in LPM3 mode?

The MSP430F6634IZQWT consumes 1.8 µA in LPM3 mode at 2.2 V and 2.1 µA at 3.0 V (typical values), with the watchdog timer, crystal oscillator (XT1), and supply supervisor active while retaining full RAM contents. This ultra-low standby current enables multi-year battery life in applications such as utility meters and environmental sensors where periodic wake-up events occur infrequently but must maintain accurate real-time tracking.

Is the MSP430F6634IZQWT pin-compatible with other devices in the MSP430F663x family?

Yes, the MSP430F6634IZQWT is pin-compatible with all other MSP430F663x devices offered in the 113-pin ZQW package, including MSP430F6635IZQWT, MSP430F6633IZQWT, and MSP430F6630IZQWT. Pin assignments, electrical characteristics, and peripheral mappings are identical across the ZQW variants - allowing hardware reuse and firmware differentiation solely through flash memory size and feature enablement (e.g., DAC presence in F6634/F6635 vs. absence in F6630–F6633).