Texas Instruments MSP430F6631IPZ

Overview

MSP430F6631IPZ from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring USB 2.0, dual 12-bit DACs, 12-bit ADC with autoscan, four 16-bit timers, two USCI modules (UART/IrDA/SPI/I²C), RTC with battery backup, LCD driver for up to 160 segments, and 74 GPIO pins - designed for battery-powered sensor systems and portable metering applications.

For engineers reviewing the MSP430F6631IPZ datasheet, MSP430F6631IPZ pinout, MSP430F6631IPZ application, or MSP430F6631IPZ equivalent, key selection criteria include USB integration without external PHY, LPM3.5 RTC operation at 1.1 µA, 192 KB flash/16 KB RAM memory configuration, and LQFP-100 package compatibility with industrial temperature range (–40°C to 85°C).

Technical Context

The MSP430F6631IPZ implements a 16-bit RISC CPUXV2 core with constant generators and hardware multiplier supporting 32-bit operations. Its unified clock system integrates FLL, VLO, REFO, XT1 (32-kHz crystal), and XT2 (up to 32-MHz crystal) with programmable LDO core regulation and brownout detection.

Peripherals include ADC12_A with 12 external + 4 internal channels, Comp_B with 12 inputs, USB-PHY with integrated 3.3-V/1.8-V power system and USB-PLL, and DMA controller with six channels. All low-power modes (LPM0–LPM4.5) support sub-µA wake-up latency, including 3 µs AM wakeup from LPM3.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm), thermally enhanced, RoHS-compliant, rated for –40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430F6631IPZ, MSP430F6632IPZ offers more flash headroom while maintaining identical USB, LCD, and timing capabilities; MSP430F6637IPZ trades flash margin for integrated ADC functionality - both share the same LQFP-100 footprint and industrial temperature rating.

Availability

MSP430F6631IPZ is available at Aetrix Electronics and suitable for energy metering, portable medical devices, industrial remote controls, smart thermostats, and handheld test equipment requiring stable component supply across extended product lifecycles.

Supply support for MSP430F6631IPZ 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The MSP430F663x family targets ultra-low-power sensing and measurement applications, integrating USB, LCD, and precision analog peripherals into a single chip to minimize system-level power and component count.

FAQ

What is the maximum system clock frequency supported by the MSP430F6631IPZ?

The MSP430F6631IPZ supports up to 20 MHz system clock frequency using the integrated FLL with XT2 crystal input (up to 32 MHz). This enables full-speed USB 2.0 operation and high-throughput ADC sampling at 200 ksps, confirmed in Section 8.20 (DCO Frequency) and Section 8.17 (XT2 specifications) of the SLAS566G datasheet.

Does the MSP430F6631IPZ include an analog-to-digital converter (ADC)?

No, the MSP430F6631IPZ does not include an ADC. Per Table 6-1 (Device Comparison) in the SLAS566G datasheet, MSP430F6631IPZ has "–" under the ADC12_A (Ch) column, distinguishing it from variants like MSP430F6637IPZ (12 ext, 4 int channels) and MSP430F6638IPZ (12 ext, 4 int channels). This omission reduces cost and power for applications relying solely on external sensors or digital interfaces.

What USB features are integrated into the MSP430F6631IPZ?

The MSP430F6631IPZ integrates full-speed USB 2.0 functionality including USB-PHY, USB-PLL, 3.3-V/1.8-V USB power system, eight endpoints (four IN, four OUT), and descriptor handling - enabling HID, CDC, or MSC class implementations without external transceivers or voltage regulators, as detailed in Sections 4.3 and 8.53–8.56 of SLAS566G.

What is the operating temperature range for the MSP430F6631IPZ?

The MSP430F6631IPZ is specified for industrial operation from –40°C to +85°C, validated per recommended operating conditions in Section 8.3 of the SLAS566G datasheet. This range supports deployment in uncontrolled environments such as outdoor energy meters, HVAC systems, and portable industrial tools.

How many general-purpose I/O pins does the MSP430F6631IPZ provide?

The MSP430F6631IPZ provides 74 general-purpose I/O pins distributed across ports P1–P9 and PJ, as confirmed in the device description (Section 3) and Table 6-1 of SLAS566G. These pins support peripheral multiplexing for USCI, timers, ADC (on other variants), DAC, LCD, and interrupt-capable digital I/O functions.