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Texas Instruments MSP430F6635IPZR
- Part No.:
- MSP430F6635IPZR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F6635IPZR.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,689
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Product details
Overview
MSP430F6635IPZR from Texas Instruments is an ultra-low-power 16-bit mixed-signal microcontroller featuring a 256 KB flash memory, 16 KB + 2 KB RAM, USB 2.0 full-speed interface, 12-bit ADC with 16 channels (12 external, 4 internal), and up to 74 GPIO pins in a 100-pin LQFP package. It targets battery-powered portable measurement systems requiring RTC backup, LCD driving, and sensor interfacing.
For engineers reviewing the MSP430F6635IPZR datasheet, MSP430F6635IPZR pinout, MSP430F6635IPZR application, or MSP430F6635IPZR equivalent, key selection criteria include USB integration, low-power LPM3.5/4.5 current (1.1 µA / 0.3 µA), 12-bit DAC absence, and compatibility with TI's MSP430F663x family toolchain and firmware libraries.
Technical Context
The MSP430F6635IPZR implements a 16-bit RISC CPUXV2 core with constant generators and hardware multiplier supporting 32-bit operations. Its unified clock system includes FLL stabilization, VLO and REFO internal sources, XT1 (32 kHz crystal), and XT2 (up to 32 MHz crystal), enabling precise timing across five low-power modes.
Peripherals are tightly integrated: four 16-bit timers (TA0/TA1/TA2/TB0), two USCIs (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, RTC_B with alarm and battery backup, and LCD_B driver supporting up to 160 segments - all operating under programmable LDO-regulated core voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2 with hardware multiplier; enables efficient signal processing and deterministic real-time control. |
| Flash / RAM | 256 KB flash + 16 KB + 2 KB RAM; supports large firmware images and dual-bank operation with USB SRAM usable as general-purpose RAM. |
| USB Interface | Full-speed USB 2.0 with integrated PHY, PLL, and 3.3-V/1.8-V power system; eliminates need for external transceivers or regulators. |
| ADC | 12-bit ADC12_A with 200 ksps, 16-channel autoscan (12 external, 4 internal), internal reference (1.5/2.0/2.5 V); suitable for multi-sensor data acquisition. |
| Low-Power Modes | LPM3.5: 1.1 µA (RTC active, crystal); LPM4.5: 0.3 µA (full shutdown); wake-up in 3 µs from standby; critical for multi-year battery life. |
| Timers & Communication | Four 16-bit timers (TA0/TA1/TA2/TB0), two USCI modules (UART/IrDA/SPI/I²C), no DAC; supports motor control, protocol bridging, and time-critical event handling. |
| Package | LQFP-100 (14 mm × 14 mm); exposes 74 GPIO pins with configurable pullups/downs, Schmitt-trigger inputs, and port mapping controller. |
Pinout & Package
LQFP-100 package (14 mm × 14 mm) with exposed thermal pad; 74 multifunction I/O pins, including dedicated USB DP/DM, crystal (XT1/XT2), JTAG/SBW debug, RTC backup, and LCD segment/com drivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST/NMI/SBWTDIO | Reset / Non-maskable interrupt / Spy-Bi-Wire data I/O | Single-pin debug interface compatible with TI MSP-FET; enables programming and real-time debugging without dedicated JTAG pins. |
| DP / DM | USB differential data pair | Full-speed USB 2.0 physical layer signals; require 27-Ω series resistors and proper PCB routing for EMI compliance. |
| XT1IN / XT1OUT | Low-frequency crystal oscillator terminals | Supports 32.768-kHz watch crystal for RTC accuracy; internal load capacitors configurable via registers. |
| XT2IN / XT2OUT | High-frequency crystal oscillator terminals | Supports crystals up to 32 MHz for system clock; optional bypass mode for external clock source. |
| P1.x–P9.x | General-purpose I/O ports | 74 total GPIO with interrupt capability, configurable drive strength, and port mapping controller for flexible peripheral routing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 1.1 µA in RTC-active LPM3.5 and 0.3 µA in LPM4.5 enable decade-scale battery life in metering and sensing applications. |
| Integrated USB subsystem | On-chip USB-PHY, PLL, and dual-voltage power system eliminate external components, reducing BOM cost and board area. |
| 12-bit ADC with autoscan | Simultaneous sampling of up to 16 analog inputs (12 external sensors + 4 internal references) without CPU intervention. |
| Unified clock system | FLL-stabilized DCO with multiple internal/external sources ensures robust clocking across temperature and voltage variations. |
| LCD driver with contrast control | Direct drive of up to 160 segments with software-adjustable bias and charge pump; eliminates external LCD controller IC. |
Applications
| Smart Energy Metering | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Battery-powered electricity/water/gas meter with real-time consumption logging, tamper detection, and optical/IR communication. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling of shunt/CT sensors, RTC timestamping, LCD display, and USB-based firmware updates. Use Value: LPM3.5 current (1.1 µA) extends battery life beyond 10 years; integrated USB enables field technician reprogramming without opening enclosure. |
Use Scenario: Handheld pulse oximeter or glucose monitor aggregating data from optical, temperature, and electrochemical sensors. IC Role / Device Role / Timing Role: Central data acquisition unit synchronizing 12-bit ADC conversions, driving segmented LCD, and communicating via USB to host PC for calibration and report export. Use Value: 200 ksps ADC autoscan captures multi-channel physiological waveforms; 3 µs wake-up ensures responsive button press handling without latency. |
| Industrial Remote Control Panel | Programmable Digital Thermostat |
|
Use Scenario: Wall-mounted HMI for HVAC or lighting control with push buttons, rotary encoder, LCD, and USB configuration port. IC Role / Device Role / Timing Role: Real-time input processor reading mechanical/electronic inputs, updating LCD segments, and executing control logic with RTC-based scheduling. Use Value: 74 GPIO support direct matrix keypad and encoder interface; integrated LCD_B driver reduces component count by eliminating external display controller. |
Use Scenario: Battery-operated thermostat with ambient temperature/humidity sensing, setpoint adjustment, and weekly schedule storage. IC Role / Device Role / Timing Role: Low-power environmental monitoring node using internal temperature sensor and external I²C humidity sensor, backed by RTC and nonvolatile flash. Use Value: LPM4.5 shutdown (0.3 µA) preserves battery during seasonal inactivity; internal REFO (2.0 V) provides stable ADC reference independent of supply droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6636IPZR | 128 KB flash, same peripherals except no DAC; identical package, pinout, and USB/ADC/LCD specs. | Suitable where firmware size <128 KB and DAC not required; lower cost but reduced code margin. | Select when flash budget allows and DAC functionality is unused; drop-in replacement with no layout changes. |
| MSP430F6634IPZR | 192 KB flash, same peripheral set as MSP430F6635IPZR; differs only in flash capacity and ordering part number. | Preferred for mid-size firmware deployments needing more space than F6636 but less than F6635; identical power/performance envelope. | Choose for balanced cost/flash trade-off; verified pin-compatible and functionally identical except flash size. |
Compared with MSP430F6635IPZR, MSP430F6636IPZR offers 128 KB flash at lower cost for simpler applications, while MSP430F6634IPZR provides 192 KB flash with identical feature set - both retain full USB, LCD, RTC, and ADC capabilities without design modification.
Availability
MSP430F6635IPZR is available at Aetrix Electronics and suitable for smart metering, portable medical devices, industrial HMIs, and programmable thermostats requiring stable component supply, long-term lifecycle support, and TI-qualified production traceability.
Supply support for MSP430F6635IPZR 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 over 50 years of innovation in low-power design.
The MSP430F663x product line delivers ultra-low-power mixed-signal MCUs optimized for portable measurement, sensor fusion, and battery-constrained human-interface applications - emphasizing energy efficiency, integrated peripherals, and rapid wake-up responsiveness.
FAQ
Does MSP430F6635IPZR include a digital-to-analog converter (DAC)?
No, MSP430F6635IPZR does not include a DAC. Per the official device comparison table (SLAS566G), DAC12_A is marked with "–" for MSP430F6635, confirming its absence. This distinguishes it from MSP430F6638/F6637/F6636 which integrate dual 12-bit DACs. Designers requiring analog output must use external DACs or PWM-based filtering solutions with MSP430F6635IPZR.
What is the maximum system clock frequency supported by MSP430F6635IPZR?
MSP430F6635IPZR supports a maximum system clock frequency of 20 MHz, as confirmed in the "Description" section and functional block diagrams. While the XT2 oscillator accepts crystals up to 32 MHz, the CPU and peripheral clock domains are rated for 20 MHz operation per electrical specifications - exceeding this may cause timing violations or instability.
Which low-power modes are available on MSP430F6635IPZR, and what is the current draw in LPM3.5?
MSP430F6635IPZR supports five low-power modes (LPM0–LPM4.5). In LPM3.5 (RTC active with 32-kHz crystal), typical current draw is 1.1 µA at 3.0 V, as specified in the "Features" section and Section 8.5. This mode retains RTC functionality and RAM while minimizing power - ideal for time-stamped data logging in battery-powered applications.
Is MSP430F6635IPZR pin-compatible with other devices in the MSP430F663x family?
Yes, MSP430F6635IPZR in the LQFP-100 (PZ) package shares identical pinout and package dimensions with MSP430F6638IPZR, MSP430F6637IPZR, MSP430F6636IPZR, MSP430F6634IPZR, and MSP430F6633IPZR. Pin diagrams in Section 7.1 confirm this uniformity, enabling hardware reuse across firmware variants with different flash sizes or peripheral configurations.
What USB speed and compliance level does MSP430F6635IPZR support?
MSP430F6635IPZR supports full-speed USB 2.0 (12 Mbps) with integrated USB-PHY, USB-PLL, and dual-voltage power system (3.3 V and 1.8 V). It complies with USB 2.0 specification for device-side operation and requires no external transceiver. The USB module includes eight endpoints (four IN, four OUT) and supports standard device descriptors for HID, CDC, and custom class implementations.
MSP430F6635IPZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
MSP430F6635IPZR FAQ
1.How can I place an order for MSP430F6635IPZR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6635IPZR 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 MSP430F6635IPZR reliable?
The price and inventory of MSP430F6635IPZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6635IPZR is usually 5 days.
3.What payment methods are accepted for MSP430F6635IPZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6635IPZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6635IPZR?
MSP430F6635IPZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6635IPZR 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 MSP430F6635IPZR?
For technical support, including MSP430F6635IPZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6635IPZR requirements.
6.How does Aetrix verify that MSP430F6635IPZR is sourced from the original manufacturer or authorized distributors?
All MSP430F6635IPZR 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 MSP430F6635IPZR meets industry standards.
7.What is the process for return or replacement of MSP430F6635IPZR?
All MSP430F6635IPZR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6635IPZR, 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 MSP430F6635IPZR part is unused and in its original packaging.
Return procedure for MSP430F6635IPZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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