Texas Instruments MSP430F6631IZQWR

Overview

MSP430F6631IZQWR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring USB 2.0, dual 12-bit DACs, a 12-bit ADC with autoscan, four 16-bit timers, two USCI modules (UART/IrDA/SPI/I²C), RTC with battery backup, and integrated LCD driver for up to 160 segments - deployed in portable sensor systems and handheld meters.

For engineers reviewing the MSP430F6631IZQWR datasheet, MSP430F6631IZQWR pinout, MSP430F6631IZQWR application, or MSP430F6631IZQWR equivalent, key selection criteria include USB PHY integration, 192 KB flash/16 KB RAM memory configuration, MicroStar Junior BGA-113 packaging, LPM3.5 RTC operation at 1.1 µA, and absence of on-chip ADC input channels (0 external ADC inputs per Device Comparison Table).

Technical Context

The MSP430F6631IZQWR implements a 16-bit RISC CPU with constant generators and a digitally controlled oscillator (DCO), enabling 3 µs wake-up from standby mode. Its unified clock system integrates FLL stabilization, VLO and REFO internal sources, XT1 (32 kHz), and XT2 (up to 32 MHz) crystal support.

Power management includes a programmable LDO core regulator, supply voltage supervision (SVS/SVM), brownout detection, and five low-power modes (LPM0–LPM4.5). Peripherals are accessed via six-channel DMA and share a common bus architecture with memory-mapped registers.

Key Specifications

Pinout & Package

Package: MicroStar Junior™ BGA (ZQW), 113-pin, 7 mm × 7 mm footprint. This package is marked Last Time Buy per TI documentation (SLAS566G, Section 11).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6631IZQWR, the IPZ alternatives offer identical functionality in through-hole-compatible packages but lack the compactness and thermal performance of the ZQW BGA - making them preferable for development, low-volume production, or designs avoiding BGA reflow processes.

Availability

MSP430F6631IZQWR is available at Aetrix Electronics and suitable for smart energy meters, portable medical monitors, and industrial remote sensors requiring stable component supply across extended product lifecycles.

Supply support for MSP430F6631IZQWR 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 company delivering analog and embedded processing solutions, with leadership in low-power design and precision analog integration.

The MSP430F663x product line targets ultra-low-power portable measurement systems - combining USB connectivity, RTC longevity, and integrated LCD drive to minimize system-level BOM and power consumption in battery-operated instrumentation.

FAQ

What is the flash memory size of the MSP430F6631IZQWR?

The MSP430F6631IZQWR contains 192 KB of on-chip flash memory, confirmed in the Device Comparison Table (Table 6-1) of the official datasheet SLAS566G. This capacity supports complex firmware including USB device stacks, real-time operating systems, and cryptographic libraries while leaving room for field updates. The MSP430F6631IZQWR flash is organized for efficient erase/write operations and supports segment-level protection.

Does the MSP430F6631IZQWR include an integrated ADC?

No, the MSP430F6631IZQWR does not include functional ADC input channels. As specified in Table 6-1 of SLAS566G, its ADC12_A row shows "–" under "Ch", indicating zero external or internal ADC inputs. While the device retains the ADC12_A peripheral register map, it lacks analog input pins and associated front-end circuitry - unlike MSP430F663x variants with "12 ext, 4 int" entries. The MSP430F6631IZQWR relies on external ADCs for analog sensing.

What package type is used for the MSP430F6631IZQWR?

The MSP430F6631IZQWR uses the MicroStar Junior™ BGA (ZQW) package: a 113-ball, 7 mm × 7 mm body-size array with 0.5-mm pitch. Per TI's SLAS566G datasheet (Section 11), this package is designated Last Time Buy, meaning new orders are accepted but long-term availability is limited. The ZQW footprint provides superior thermal dissipation and board density versus LQFP alternatives like the MSP430F6631IPZ.

Can the MSP430F6631IZQWR operate in USB host mode?

No, the MSP430F6631IZQWR supports USB device mode only. Its integrated USB-PHY and USB-PLL are configured exclusively for full-speed (12 Mbps) peripheral operation, as documented in Sections 1.1 and 4.3 of SLAS566G. It lacks OTG capabilities, host controller logic, or VBUS sensing circuitry required for host-mode negotiation. The MSP430F6631IZQWR must be connected to a USB host (e.g., PC or hub) and cannot initiate transactions as a host.

What is the lowest power consumption mode supported by the MSP430F6631IZQWR?

The MSP430F6631IZQWR achieves its lowest active power state in LPM4.5 (shutdown mode), drawing 0.3 µA at 3.0 V per SLAS566G Section 8.5. In this mode, all clocks are halted, RAM is retained, and only the RST/NMI pin can wake the device. Unlike LPM3.5 (which maintains RTC with crystal), LPM4.5 disables all peripherals - making it ideal for long-term storage or emergency shutdown where zero functional activity is required until external reset.