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Texas Instruments MSP430F6635IZQWR
- Part No.:
- MSP430F6635IZQWR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 113-VFBGA
- Datasheet:
-
MSP430F6635IZQWR.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 113BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,091
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Product details
Overview
MSP430F6635IZQWR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring 256 KB flash, 16 KB + 2 KB RAM, USB 2.0 full-speed interface, 12-bit ADC (200 ksps, 16 channels), four 16-bit timers, two USCI modules (UART/IrDA/SPI/I²C), RTC with battery backup, and LCD driver supporting up to 160 segments. It operates from 1.8 V to 3.6 V and targets battery-powered sensor systems and portable meters.
For engineers reviewing the MSP430F6635IZQWR datasheet, MSP430F6635IZQWR pinout, MSP430F6635IZQWR application, or MSP430F6635IZQWR equivalent, key selection criteria include USB integration, ultra-low standby current (1.8 µA in LPM3), 74 I/O pins in MicroStar Junior BGA (113-pin), real-time clock with alarm, and absence of on-chip DACs compared to higher-tier F663x variants.
Technical Context
The MSP430F6635IZQWR implements a 16-bit RISC CPUXV2 core with constant generators and hardware multiplier for 32-bit operations, paired with a unified clock system including FLL, VLO, REFO, XT1 (32 kHz), and XT2 (up to 32 MHz). Its power architecture integrates a programmable LDO, supply supervision, brownout detection, and five low-power modes - enabling wake-up from LPM3 in 3 µs (typical).
Peripherals are organized around six-channel DMA, dual USCI modules (USCI_A0/A1 for UART/IrDA/SPI; USCI_B0/B1 for I²C/SPI), USB-PHY with integrated 3.3-V/1.8-V power system and USB-PLL, and a 12-bit ADC with autoscan, internal reference (1.5/2.0/2.5 V), and temperature sensor. Unlike MSP430F6638/F6636, it omits dual 12-bit DACs but retains full USB, RTC, LCD, and comparator functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2 with hardware multiplier supporting 32-bit arithmetic - enables efficient signal processing and control loop execution without external coprocessor. |
| Flash / RAM | 256 KB flash + 16 KB + 2 KB SRAM (USB buffer usable as general RAM) - supports complex firmware with USB stack, real-time logging, and LCD GUI assets. |
| USB Interface | Full-speed USB 2.0 with integrated PHY, PLL, and dual-voltage power system - eliminates need for external transceiver or level-shifting components. |
| ADC Performance | 12-bit ADC, 200 ksps, 16 channels (12 external + 4 internal), autoscan mode - captures multi-sensor analog inputs synchronously with minimal CPU overhead. |
| Low-Power Modes | LPM3: 1.8 µA at 2.2 V; LPM3.5 (RTC active): 1.1 µA at 3.0 V; LPM4.5: 0.3 µA - enables decade-scale battery life in always-on monitoring applications. |
| Timer Resources | Four 16-bit timers: TA0 (5 CC), TA1/TA2 (3 CC each), TB0 (7 CC) - supports simultaneous PWM generation, input capture, quadrature decoding, and real-time scheduling. |
| I/O Count | 74 configurable GPIO pins across 10 ports (P1–P9, PJ) with interrupt capability, Schmitt-trigger inputs, and programmable drive strength - accommodates dense sensor/actuator interfacing and segment-based LCD driving. |
Pinout & Package
Package: MicroStar Junior™ BGA (113-pin, ZQW), 7 mm × 7 mm body size. Pin mapping follows TI's standardized 113-ball BGA layout for MSP430F663x series, with dedicated VCC/DVCC/AVCC, ground balls, and peripheral-specific ball assignments (e.g., DP/DM for USB, XIN/XOUT for crystals, LCDSxx for LCD segments).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire debug I/O | Single-pin multifunction interface for device initialization, fault recovery, and in-circuit programming/debugging without JTAG header. |
| DP / DM | USB differential data pair | Direct connection to USB host/device; requires no external termination or ESD protection due to integrated PHY compliance. |
| XIN / XOUT | Low-frequency crystal oscillator terminals | Supports 32.768 kHz watch crystal for RTC accuracy; internal load capacitors eliminate need for external caps in most designs. |
| LCDS0–LCDS39 | LCD segment drivers | Drive up to 160 segments in static or multiplexed (4-backplane) configuration; software-configurable bias and contrast control. |
| P1.0–P9.7, PJ.0–PJ.7 | General-purpose I/O with peripheral multiplexing | 74 total pins support UART, I²C, SPI, timer capture/compare, ADC inputs, and comparator I/O - enables flexible peripheral routing without pin conflicts. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB 2.0 Full-Speed PHY | Eliminates external transceiver, reduces BOM count by ≥3 components, and simplifies USB compliance testing via on-die electrostatic discharge (ESD) protection. |
| Unified Clock System with FLL | Enables stable 20-MHz system clock from low-cost 32-kHz crystal or internal VLO - removes need for high-frequency crystal and associated layout constraints. |
| Seven Low-Power Modes (LPM0–LPM4.5) | Allows granular power optimization: e.g., LPM3.5 maintains RTC timekeeping at 1.1 µA while preserving RAM, enabling calendar-aware wake-up without external RTC IC. |
| Hardware CRC16 Engine | Offloads checksum computation from CPU during firmware updates or data logging - reduces flash write latency and extends EEPROM emulation endurance. |
| 12-Bit ADC with Internal Reference | Provides calibrated 1.5 V / 2.0 V / 2.5 V references independent of AVCC - ensures consistent measurement accuracy across varying supply conditions. |
Applications
| Portable Hand-Held Meter | Digital Thermostat |
|---|---|
|
Use Scenario: Battery-powered multimeter measuring voltage, current, resistance, and temperature with LCD display and USB data export. IC Role / Device Role / Timing Role: Central controller managing analog front-end, LCD refresh, button scanning, USB CDC communication, and RTC-stamped logging. Use Value: Ultra-low 1.8 µA LPM3 current extends AA battery life beyond 5 years; integrated USB avoids separate interface IC; 160-segment LCD driver supports custom icons and bar graphs. |
Use Scenario: Wall-mounted HVAC controller with ambient/remote temperature sensing, relay actuation, and wireless gateway connectivity via USB-to-serial bridge. IC Role / Device Role / Timing Role: Primary MCU executing PID control loop, reading thermistors via ADC, driving relays through GPIO, and maintaining accurate time for scheduling. Use Value: RTC with crystal backup ensures ±2 ppm timekeeping over temperature; 74 I/O pins support multiple sensors, displays, and communication interfaces without expansion logic. |
| Remote Sensor Node | Analog Motor Control Panel |
|
Use Scenario: Solar-powered environmental monitor collecting humidity, pressure, and CO₂ data, then transmitting via USB-connected cellular modem. IC Role / Device Role / Timing Role: Data acquisition hub performing ADC sampling, sensor calibration, CRC-protected data buffering, and USB mass storage emulation for field data retrieval. Use Value: 256 KB flash stores firmware + historical logs; LPM4.5 (0.3 µA) enables multi-year operation on supercapacitor backup; USB enumeration handles plug-and-play host recognition. |
Use Scenario: Industrial motor starter panel with current/voltage monitoring, thermal shutdown, soft-start sequencing, and local HMI via segmented LCD. IC Role / Device Role / Timing Role: Real-time controller executing PWM timing, analog protection thresholds, fault latching, and LCD status feedback with millisecond-level response. Use Value: Four 16-bit timers provide independent PWM channels for gate drivers and precise input capture for encoder feedback; comparator_B enables fast overcurrent detection (<1 µs response). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6636IPZ | Same core, peripherals, and memory; differs in package (100-pin LQFP vs. 113-pin ZQW) and includes dual 12-bit DACs - absent in MSP430F6635IZQWR. | Suitable where analog output (e.g., sensor calibration voltage, bias generation) is required; not drop-in due to package and DAC pinout differences. | Select MSP430F6636IPZ only if DAC functionality is mandatory and LQFP layout is acceptable; MSP430F6635IZQWR remains optimal for USB+LCD+ADC-centric designs in space-constrained BGA layouts. |
| MSP430F6634IZQWR | Identical package (ZQW), same USB/LCD/RTC/ADC/timer set, but reduced flash (192 KB vs. 256 KB) and no DAC - matches MSP430F6635IZQWR feature set except memory size. | Better suited for cost-sensitive applications with smaller firmware footprints; insufficient for complex USB stacks with large descriptor tables or extensive GUI assets. | Choose MSP430F6634IZQWR when firmware size stays under 192 KB and BGA footprint is fixed; MSP430F6635IZQWR provides headroom for future feature expansion and bootloader robustness. |
Compared with MSP430F6636IPZ, the MSP430F6635IZQWR trades DACs for BGA packaging and higher flash density, favoring compact, USB-connected instrumentation. Against MSP430F6634IZQWR, it delivers 64 KB more flash for enhanced firmware resilience and USB descriptor flexibility - critical for certified device-class implementations.
Availability
MSP430F6635IZQWR is available at Aetrix Electronics and suitable for portable meters, digital thermostats, remote sensor nodes, and analog motor control panels requiring stable component supply, long-term lifecycle support, and verified BGA assembly compatibility.
Supply support for MSP430F6635IZQWR 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in ultra-low-power microcontrollers for industrial and sensing applications.
The MSP430F663x product line was designed for battery-operated measurement systems requiring integrated USB, high-resolution analog peripherals, and extended sleep-mode efficiency - targeting metering, HVAC, and portable instrumentation markets.
FAQ
What is the maximum system clock frequency supported by the MSP430F6635IZQWR?
The MSP430F6635IZQWR supports a maximum system clock frequency of 20 MHz, achieved using the integrated FLL with either an external high-frequency crystal (XT2, up to 32 MHz) or internal VLO/REFO sources. This frequency enables real-time processing of ADC samples, USB transactions, and LCD updates without compromising low-power operation in active mode.
Does the MSP430F6635IZQWR include built-in digital-to-analog converters (DACs)?
No, the MSP430F6635IZQWR does not include on-chip DACs. Per the official device comparison table (SLAS566G), DAC12_A channels are marked as "–" for MSP430F6635, distinguishing it from MSP430F6636/MSP430F6638 which feature dual 12-bit DACs. Designers requiring analog output must use external DACs or select a higher-tier variant.
What package type and pin count does the MSP430F6635IZQWR use?
The MSP430F6635IZQWR uses the MicroStar Junior™ BGA package (ZQW) with 113 balls and a 7 mm × 7 mm body size. It provides 74 usable I/O pins, with dedicated balls for USB (DP/DM), crystal (XIN/XOUT), power (DVCC/AVCC), ground, and LCD segment drivers (LCDS0–LCDS39).
How does the MSP430F6635IZQWR handle real-time clock (RTC) functionality with power loss?
The MSP430F6635IZQWR integrates an RTC_B module with automatic supply voltage backup switching. When main DVCC drops below threshold, the RTC seamlessly transitions to a backup source (e.g., coin cell on VBAT pin), retaining time, date, and alarm settings while consuming just 1.1 µA in LPM3.5 mode - ensuring uninterrupted timekeeping during main power interruptions.
Can the MSP430F6635IZQWR operate without an external crystal?
Yes, the MSP430F6635IZQWR can operate without external crystals. It includes internal low-frequency oscillators (VLO at ~10 kHz and trimmed REFO at 32.768 kHz) sufficient for basic timing and LPM3 operation. However, for RTC accuracy or USB clock precision, a 32.768 kHz crystal (XT1) is required - the device does not derive USB timing from internal sources.
MSP430F6635IZQWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 113-VFBGA
- 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:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 18K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430F6635IZQWR FAQ
1.How can I place an order for MSP430F6635IZQWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6635IZQWR 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 MSP430F6635IZQWR reliable?
The price and inventory of MSP430F6635IZQWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6635IZQWR is usually 5 days.
3.What payment methods are accepted for MSP430F6635IZQWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6635IZQWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6635IZQWR?
MSP430F6635IZQWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6635IZQWR 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 MSP430F6635IZQWR?
For technical support, including MSP430F6635IZQWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6635IZQWR requirements.
6.How does Aetrix verify that MSP430F6635IZQWR is sourced from the original manufacturer or authorized distributors?
All MSP430F6635IZQWR 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 MSP430F6635IZQWR meets industry standards.
7.What is the process for return or replacement of MSP430F6635IZQWR?
All MSP430F6635IZQWR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6635IZQWR, 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 MSP430F6635IZQWR part is unused and in its original packaging.
Return procedure for MSP430F6635IZQWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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