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Texas Instruments MSP430F6631IPZR
- Part No.:
- MSP430F6631IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F6631IPZR.pdf
- Description:
- IC MCU 16BIT 192KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
MSP430F6631IPZR from Texas Instruments is an ultra-low-power 16-bit RISC microcontroller with USB 2.0 interface, 192 KB flash, 16 KB + 2 KB RAM, and 74 GPIO pins in a 100-pin LQFP package. It integrates a 12-bit ADC (12 external + 4 internal 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 hardware multiplier - designed for battery-powered sensor systems and portable meters.
For engineers reviewing the MSP430F6631IPZR datasheet, MSP430F6631IPZR pinout, MSP430F6631IPZR application, or MSP430F6631IPZR equivalent, key selection criteria include USB-capable low-power MCU architecture, integrated LCD/RTC/ADC/DAC, LQFP-100 packaging, and compatibility within the MSP430F663x family for firmware reuse and design scalability.
Technical Context
The MSP430F6631IPZR implements a unified clock system with FLL stabilization, VLO and REFO internal sources, XT1 (32-kHz crystal), and XT2 (up to 32-MHz crystal). Its power management includes programmable LDO core regulation, supply supervision, brownout detection, and five low-power modes (LPM0–LPM4.5) enabling sub-µA shutdown operation.
Peripherals are tightly coupled via a 6-channel DMA controller and interrupt vectoring across 74 I/O pins. The USB subsystem features integrated PHY, 3.3-V/1.8-V power system, USB-PLL, and eight bidirectional endpoints - supporting full-speed device-mode operation without external transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2 with constant generators and 20-MHz max system clock - enables high code efficiency and deterministic real-time response. |
| Flash / RAM | 192 KB flash + 16 KB main RAM + 2 KB USB RAM - supports complex firmware with USB buffer allocation and retained data during low-power states. |
| USB Interface | Full-speed (12 Mbps) USB 2.0 device mode with integrated PHY and PLL - eliminates need for external USB transceiver or clock source. |
| ADC | 12-bit SAR ADC with 200 ksps, 16-channel autoscan (12 external, 4 internal), shared reference - suitable for multi-sensor analog acquisition with minimal CPU overhead. |
| Low-Power Modes | LPM3.5 (RTC active): 1.1 µA at 3.0 V; LPM4.5 (shutdown): 0.3 µA at 3.0 V - enables years of operation on coin-cell batteries in metering applications. |
| LCD Driver | Integrated LCD_B module driving up to 160 segments with contrast control - reduces BOM count and PCB area for display-enabled portable devices. |
| Timers & USCI | Four 16-bit timers (TA0/TA1/TA2/TB0) and two USCI modules (USCI_A0/A1/B0/B1) - supports simultaneous UART, I²C, SPI, and IrDA communication with hardware acceleration. |
Pinout & Package
Package: LQFP-100 (14 mm × 14 mm, 0.5-mm pitch), RoHS-compliant, surface-mount. Pinout validated per TI SLAS566G Figure 7-1 (100-pin PZ package).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire debug I/O | Single-pin multifunction interface for reset assertion, NMI triggering, and 2-wire JTAG-like programming/debugging. |
| P1.x – P9.x (74 total) | General-purpose I/O with interrupt capability | Configurable as digital I/O, peripheral function pins (e.g., USCI, ADC, timer), or LCD segment/common drivers - supports flexible signal routing. |
| XT1IN / XT1OUT | Low-frequency crystal oscillator terminals | Supports 32.768-kHz watch crystal for precise RTC timing and LPM3/LPM3.5 operation with crystal accuracy. |
| XT2IN / XT2OUT | High-frequency crystal oscillator terminals | Accepts crystals up to 32 MHz for high-speed system clock generation; bypassable for external clock input. |
| USB_DP / USB_DM | Full-speed USB differential data pair | Direct connection to USB connector; integrated termination and ESD protection eliminate external components. |
| AVCC / AVSS / DVCC / DVSS | Analog/digital power and ground rails | Separate analog and digital supplies enable noise isolation for precision ADC/DAC operation and stable core logic. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power LPM4.5 | 0.3 µA shutdown current at 3.0 V enables decade-scale battery life in always-on monitoring nodes. |
| Integrated USB-PHY + PLL | Eliminates external transceiver and crystal; reduces bill-of-materials and layout complexity for USB-connected devices. |
| Dual 12-bit DACs with sync | Simultaneous voltage outputs support closed-loop motor control or dual-channel analog stimulus generation. |
| Hardware multiplier (MPY32) | 32-bit multiply-accumulate in single cycle accelerates DSP tasks like filtering and sensor fusion without software overhead. |
| 6-channel DMA controller | Enables peripheral-to-memory and memory-to-peripheral transfers without CPU intervention - critical for low-power continuous ADC/USB streaming. |
Applications
| Smart Energy Meters | Portable Medical Monitors |
|---|---|
|
Use Scenario: Battery-powered electricity/water/gas meter with LCD display, RTC logging, and USB data download. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (current/voltage/temp), LCD refresh, RTC timestamping, and USB mass storage emulation. Use Value: Integrated LCD driver (160 seg), RTC with crystal backup, and USB device stack reduce component count and PCB area while maintaining <1.1 µA LPM3.5 current. |
Use Scenario: Handheld pulse oximeter or glucose meter requiring analog front-end, display, and PC connectivity. IC Role / Device Role / Timing Role: Sensor hub aggregating ADC inputs (photodiode, thermistor), driving segmented LCD, and acting as USB CDC device for clinical data export. Use Value: Dual 12-bit DACs enable precise LED current control; 12-bit ADC with internal references supports ratiometric measurements; USB eliminates need for proprietary cables. |
| Industrial Remote Controls | Programmable Thermostats |
|
Use Scenario: Wireless HVAC or lighting remote with button matrix, LCD, IR transmitter, and USB configuration port. IC Role / Device Role / Timing Role: Input processor handling keypad scan, IR modulation (via USCI_A UART/IrDA), LCD update, and USB firmware updates. Use Value: USCI_A modules support hardware IrDA encoding; LPM3 wake-up in 3 µs ensures responsive button press detection; integrated LDO simplifies power design. |
Use Scenario: Wall-mounted thermostat with temperature/humidity sensing, LCD UI, relay control, and USB setup interface. IC Role / Device Role / Timing Role: Environmental data concentrator running PID loop, driving LCD segments, controlling relays via GPIO, and exposing configuration via USB HID. Use Value: Voltage comparator monitors supply rail health; RTC maintains schedule during power loss; 74 GPIOs support direct relay/LED/button interfacing without expanders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power USB microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6632IPZR | 256 KB flash (vs. 192 KB), same RAM, peripherals, and package - no change in USB/LCD/RTC/ADC capabilities. | Preferred where firmware growth headroom or bootloader size demands >192 KB flash; identical low-power behavior and pinout. | Select MSP430F6632IPZR when future firmware expansion is anticipated; otherwise MSP430F6631IPZR optimizes cost for fixed-feature sets. |
| MSP430F6637IPZR | 192 KB flash (same), but adds 12-channel external ADC (vs. none in MSP430F6631IPZR); retains all other peripherals including USB/LCD/RTC. | Suitable for designs requiring higher analog channel count without sacrificing USB or display functionality - e.g., multi-sensor environmental loggers. | Choose MSP430F6637IPZR only if ≥12 external ADC inputs are required; MSP430F6631IPZR remains optimal for LCD+USB+RTC-centric applications with minimal analog sensing. |
Compared with MSP430F6632IPZR and MSP430F6637IPZR, the MSP430F6631IPZR delivers identical USB, LCD, RTC, and timer performance at lower flash capacity - making it the most cost-efficient choice for applications with fixed, moderate firmware size and no requirement for >12 external ADC channels.
Availability
MSP430F6631IPZR is available at Aetrix Electronics and suitable for smart energy meters, portable medical monitors, industrial remote controls, and programmable thermostats requiring stable component supply, long-term lifecycle assurance, and consistent manufacturing traceability.
Supply support for MSP430F6631IPZR 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 with emphasis on energy efficiency, reliability, and system integration.
The MSP430F663x product line targets ultra-low-power portable measurement and human-interface applications - combining USB connectivity, integrated LCD/RTC/ADC/DAC, and sub-µA shutdown to extend battery life in handheld and remote devices.
FAQ
What is the maximum system clock frequency supported by the MSP430F6631IPZR?
The MSP430F6631IPZR supports a maximum system clock frequency of 20 MHz, achieved using the FLL-controlled DCO or external high-frequency crystal (XT2) up to 32 MHz. This frequency enables real-time processing for USB communication, ADC sampling at 200 ksps, and LCD refresh while maintaining ultra-low power consumption in active mode (270 µA/MHz at 8 MHz, 3.0 V).
Does the MSP430F6631IPZR include an integrated USB physical layer?
Yes, the MSP430F6631IPZR integrates a full-speed USB 2.0 PHY, USB-PLL, and 3.3-V/1.8-V USB power system. This eliminates the need for external USB transceivers or dedicated USB crystals, allowing direct connection of USB_DP and USB_DM pins to a standard USB Type-A receptacle with only passive ESD protection recommended.
How many I/O pins does the MSP430F6631IPZR provide, and what is their functional flexibility?
The MSP430F6631IPZR provides 74 general-purpose I/O pins across ports P1–P9, each configurable as digital I/O, peripheral function (e.g., USCI, ADC, timer capture), or LCD segment/common drivers. All support interrupt capability and programmable drive strength, enabling direct interface to buttons, LEDs, relays, sensors, and displays without external logic.
What low-power modes are available on the MSP430F6631IPZR, and what is the lowest achievable current draw?
The MSP430F6631IPZR offers five low-power modes (LPM0–LPM4.5). The lowest current draw is in LPM4.5 (shutdown mode) at 0.3 µA at 3.0 V, with full RAM retention disabled but RTC inactive. For RTC-enabled operation, LPM3.5 draws 1.1 µA at 3.0 V - ideal for time-stamped data logging in battery-powered applications.
Is the MSP430F6631IPZR pin-compatible with other devices in the MSP430F663x family?
Yes, the MSP430F6631IPZR is pin-compatible with all 100-pin LQFP (PZ) variants in the MSP430F663x family, including MSP430F6630IPZR, MSP430F6632IPZR, MSP430F6637IPZR, and MSP430F6638IPZR. Identical pin mapping allows hardware reuse across firmware variants with different flash/RAM or peripheral configurations.
MSP430F6631IPZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, IrDA, LINbus, SCI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 74
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 18K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F6631IPZR FAQ
1.How can I place an order for MSP430F6631IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6631IPZR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430F6631IPZR reliable?
The price and inventory of MSP430F6631IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6631IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F6631IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6631IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6631IPZR?
MSP430F6631IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6631IPZR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430F6631IPZR?
For technical support, including MSP430F6631IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6631IPZR requirements.
6.How does Aetrix verify that MSP430F6631IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F6631IPZR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430F6631IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F6631IPZR?
All MSP430F6631IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6631IPZR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430F6631IPZR part is unused and in its original packaging.
Return procedure for MSP430F6631IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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