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Texas Instruments MSP430F6635IPZ
- Part No.:
- MSP430F6635IPZ
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
MSP430F6635IPZ.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
MSP430F6635IPZ 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 targets portable sensor systems and energy-constrained metering applications.
For engineers reviewing the MSP430F6635IPZ datasheet, MSP430F6635IPZ pinout, MSP430F6635IPZ application, or MSP430F6635IPZ equivalent, key selection criteria include USB integration, low-power RTC operation (1.1 µA in LPM3.5), 74 GPIO count, 3 µs wake-up time, and absence of integrated DAC-distinguishing it from MSP430F6636/6638 variants.
Technical Context
The MSP430F6635IPZ implements a 16-bit RISC CPUXV2 core with constant generators and hardware multiplier for efficient code execution. Its unified clock system integrates FLL, VLO, REFO, XT1 (32 kHz), and XT2 (up to 32 MHz) sources, enabling precise frequency control across operating modes.
Power management includes a programmable LDO, supply supervision (SVS/SVM), brownout detection, and five low-power modes (LPM0–LPM4.5). The device supports full RAM retention in LPM3, RTC operation in LPM3.5, and 0.3 µA shutdown in LPM4.5-optimized for battery longevity in remote sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit RISC CPUXV2 with 32-bit hardware multiplier for deterministic math-intensive firmware. |
| Flash / RAM | 256 KB flash (in-system programmable) + 16 KB main RAM + 2 KB USB SRAM usable as general-purpose RAM when USB inactive. |
| ADC Performance | 12-bit SAR ADC with 200 ksps sampling rate, 16-channel input (12 external, 4 internal), autoscan, and shared reference (1.5/2.0/2.5 V). |
| USB Interface | Full-speed USB 2.0 PHY with integrated 3.3-V/1.8-V power system, USB-PLL, and eight bidirectional endpoints-enables direct PC connectivity without external transceiver. |
| Low-Power Modes | LPM3 draws 1.8 µA (2.2 V) with RTC active and full RAM retention; LPM3.5 draws 1.1 µA (3.0 V) with RTC + crystal; LPM4.5 draws 0.3 µA (3.0 V) shutdown. |
| I/O Count | 74 GPIO pins across ports P1–P9 and PJ, with interrupt capability on all pins and configurable drive strength (full/reduced). |
| Timer Resources | Four 16-bit timers: TA0 (5 CC registers), TA1/TA2 (3 CC each), TB0 (7 CC)-supporting PWM, capture, compare, and real-time counting. |
Pinout & Package
LQFP-100 package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad. Pin mapping 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 debugging-reduces PCB footprint. |
| P1.x–P9.x, PJ.x | General-purpose I/O with peripheral multiplexing | 74 total GPIOs support UART, SPI, I²C, ADC inputs, LCD segment/backplane, timer capture/compare, and interrupt generation. |
| XT1IN/XT1OUT | Low-frequency crystal oscillator terminals | Supports 32.768 kHz watch crystal for RTC accuracy and low-power timing-essential for calendar functions in thermostats/meters. |
| XT2IN/XT2OUT | High-frequency crystal oscillator terminals | Accepts crystals up to 32 MHz for system clock scaling; bypass mode enables external clock source for deterministic timing. |
| DP/DM | USB differential data pair | Integrated full-speed USB transceiver eliminates need for external PHY-simplifies USB host/device implementation in portable devices. |
| AVCC/AVSS/DVCC/DVSS | Analog/digital power and ground rails | Dual-supply separation minimizes noise coupling between analog peripherals (ADC, comparator) and digital logic-critical for precision measurement. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC in LPM3.5 | 1.1 µA at 3.0 V enables decade-scale battery life in always-on timekeeping applications like digital thermostats. |
| Hardware AES accelerator | Not present-MSP430F6635IPZ lacks cryptographic acceleration; security relies on software-based implementations. |
| Integrated LCD driver | Drives up to 160 segments with programmable contrast control-eliminates external display controller in handheld meters and remote controls. |
| DMA controller | 6-channel peripheral-to-memory and memory-to-memory DMA offloads CPU during ADC sampling, USB transfers, and LCD updates. |
| USB power system | On-chip 3.3-V and 1.8-V regulators supply USB PHY and logic-removes need for external LDOs in USB-powered designs. |
Applications
| Smart Energy Meters | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-operated electricity/water/gas meters requiring long-term logging, tamper detection, and local display. IC Role / Device Role / Timing Role: Central controller managing ADC sampling of sensor signals, RTC timestamping, LCD display refresh, and USB firmware updates. Use Value: 1.1 µA RTC current extends 10-year battery life; 74 GPIOs support metrology sensors, optical pulse readers, and keypad interfaces. |
Use Scenario: Handheld blood glucose monitors or pulse oximeters needing low-noise analog front-end and compact display. IC Role / Device Role / Timing Role: Signal acquisition hub digitizing analog sensor outputs via 12-bit ADC, applying calibration algorithms, and driving segmented LCD. Use Value: Integrated 12-bit ADC with internal reference (1.5/2.0/2.5 V) ensures stable measurement accuracy across temperature; LPM3.5 preserves RTC during sleep. |
| Industrial Remote Controls | Building Automation Thermostats |
Use Scenario: Two-way IR/RF remote controllers for HVAC or lighting systems with configuration storage and battery status reporting. IC Role / Device Role / Timing Role: Protocol processor handling IrDA encoding/decoding, button scan, nonvolatile parameter storage, and low-power wake-on-event. Use Value: USCI_A0's hardware IrDA encoder reduces firmware overhead; 3 µs wake-up from LPM3 enables responsive button press detection. |
Use Scenario: Wall-mounted thermostats requiring ambient temperature/humidity sensing, user interface, and scheduled HVAC control. IC Role / Device Role / Timing Role: System-on-chip integrating temperature sensor interface, RTC-based scheduling, LCD display, and relay control logic. Use Value: Integrated RTC with alarm interrupts eliminates external real-time clock IC; LCD_B driver supports custom segment layout for intuitive UI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430F6636IPZ | Includes dual 12-bit DACs (DAC12_A); same flash/RAM/USB/peripherals otherwise. | Required for analog waveform generation (e.g., sensor calibration signals, audio feedback tones). | Select MSP430F6636IPZ only if DAC functionality is needed-MSP430F6635IPZ omits DAC to reduce cost and power in pure sensing/display roles. |
| MSP430F6637IPZ | 192 KB flash (vs. 256 KB), identical RAM, peripherals, and power specs. | Suitable where firmware size < 192 KB suffices-reduces cost without sacrificing USB, RTC, or ADC capability. | Choose MSP430F6637IPZ for cost-sensitive deployments with constrained code size; MSP430F6635IPZ provides headroom for future firmware expansion. |
Compared with MSP430F6636IPZ, MSP430F6635IPZ trades DAC capability for lower unit cost and marginally reduced active-mode current; versus MSP430F6637IPZ, it delivers 64 KB additional flash for complex protocol stacks or OTA update partitions-without altering pinout, power profile, or peripheral set.
Availability
MSP430F6635IPZ is available at Aetrix Electronics and suitable for smart energy meters, portable medical sensors, industrial remote controls, and building automation thermostats requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSP430F6635IPZ 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 and system integration.
The MSP430F663x product line targets ultra-low-power portable measurement and sensing applications-designed to maximize battery life while integrating USB, high-resolution ADC, RTC, and LCD drivers in a single chip.
FAQ
What is the maximum system clock frequency supported by the MSP430F6635IPZ?
The MSP430F6635IPZ supports a maximum system clock frequency of 20 MHz, achieved using the integrated FLL with XT2 crystal (up to 32 MHz) or external clock source. This frequency is confirmed in the device description and functional block diagram sections of the SLAS566G datasheet, and governs instruction throughput, ADC sampling rate, and USB timing margins. MSP430F6635IPZ maintains full peripheral functionality-including USB and ADC-at this speed.
Does the MSP430F6635IPZ include integrated digital-to-analog converters (DACs)?
No, the MSP430F6635IPZ does not include integrated DACs. Per Table 6-1 (Device Comparison) in the SLAS566G datasheet, DAC12_A channel count is marked "–" for MSP430F6635IPZ, distinguishing it from MSP430F6636IPZ and MSP430F6638IPZ which feature two 12-bit DACs. This omission reduces silicon area and static power, aligning with its role in sensing/display applications where DACs are unnecessary.
What package type and pin count does the MSP430F6635IPZ use?
The MSP430F6635IPZ uses a 100-pin LQFP (PZ) package measuring 14 mm × 14 mm with 0.5 mm pitch. This is explicitly documented in the Device Information table of the SLAS566G datasheet and validated in Figure 7-1 (pin diagram). It shares pin compatibility with other MSP430F663x devices in the PZ package, including identical signal assignments for USB (DP/DM), crystal (XT1/XT2), and power (DVCC/DVSS/AVCC/AVSS).
How does the MSP430F6635IPZ handle real-time clock (RTC) functionality in low-power modes?
The MSP430F6635IPZ supports RTC operation in LPM3.5 mode, drawing just 1.1 µA at 3.0 V with 32.768 kHz crystal active. This mode retains RTC registers and calendar functions while shutting down the CPU and most peripherals-enabling decade-scale battery operation in thermostats and meters. The RTC_B module includes alarm interrupts and battery backup capability, as detailed in Sections 4.2 and 8.30 of SLAS566G.
What USB capabilities does the MSP430F6635IPZ provide?
The MSP430F6635IPZ integrates a full-speed USB 2.0 PHY with eight bidirectional endpoints, on-chip 3.3-V and 1.8-V USB power regulation, and USB-PLL. It supports device-mode operation only (no host capability) and requires no external transceiver. The USB interface is electrically compliant with USB 2.0 specifications and is validated per TI's USB compliance testing-enabling reliable firmware updates and data logging in portable instruments.
MSP430F6635IPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- MSP430F6xx
- Packaging:
- Tray
- 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:
MSP430F6635IPZ FAQ
1.How can I place an order for MSP430F6635IPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430F6635IPZ 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 MSP430F6635IPZ reliable?
The price and inventory of MSP430F6635IPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430F6635IPZ is usually 5 days.
3.What payment methods are accepted for MSP430F6635IPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430F6635IPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430F6635IPZ?
MSP430F6635IPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430F6635IPZ 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 MSP430F6635IPZ?
For technical support, including MSP430F6635IPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430F6635IPZ requirements.
6.How does Aetrix verify that MSP430F6635IPZ is sourced from the original manufacturer or authorized distributors?
All MSP430F6635IPZ 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 MSP430F6635IPZ meets industry standards.
7.What is the process for return or replacement of MSP430F6635IPZ?
All MSP430F6635IPZ units undergo pre-shipment inspection (PSI). If there is an issue with MSP430F6635IPZ, 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 MSP430F6635IPZ part is unused and in its original packaging.
Return procedure for MSP430F6635IPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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