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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~MSP430F6637IPZR~~

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MSP430F6637IPZR - Texas Instruments

Name: Texas Instruments MSP430F6637IPZR
Brand: Texas Instruments
SKU: MSP430F6637IPZR
Availability: InStock
Rating: 5 (7 reviews)

Manufacturer Part Number: MSP430F6637IPZR

Manufacturer: Texas Instruments

Allelco Part Number: 98D-MSP430F6637IPZR

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 3,821 pcs available, New & Original

Parts Description: IC MCU 16BIT 192KB FLASH 100LQFP

Package: 100-LQFP (14x14)

Data sheet: MSP430F6637IPZR.pdf

PCN Design/Specification
MSP430F54yy/F6yy Datasheet Update 26/Aug/2013.pdf Mult Dev Datasheet Rev 17/Dec/2018.pdf

PCN Other
2.73KHz.pdf

HTML Datasheet
MSP430F663x Datasheet.pdf

RoHs Status: ROHS3 Compliant

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In stock: 3821

Specifications

MSP430F6637IPZR Tech Specifications
Texas Instruments - MSP430F6637IPZR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - MSP430F6637IPZR

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
Voltage - Supply (Vcc/Vdd)	1.8V ~ 3.6V
Supplier Device Package	100-LQFP (14x14)
Speed	20MHz
Series	MSP430F6xx
RAM Size	18K x 8
Program Memory Type	FLASH
Program Memory Size	192KB (192K x 8)
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Package / Case	100-LQFP
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	74
Mounting Type	Surface Mount
EEPROM Size	-
Data Converters	A/D 16x12b; D/A 2x12b
Core Size	16-Bit
Core Processor	MSP430 CPUXV2
Connectivity	I²C, IrDA, LINbus, SCI, SPI, UART/USART, USB
Base Product Number	MSP430F6637

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.31.0001

Frequently Asked Questions(FAQ)

How does the MSP430F6637IPZR handle USB connectivity in low-power embedded designs, and what considerations are needed for reliable host or peripheral operation?: The MSP430F6637IPZR includes native USB 2.0 support, enabling direct communication with PC hosts or other USB-enabled devices without requiring external transceivers. This integration reduces component count and simplifies PCB layout. However, achieving stable operation demands careful attention to power supply filtering, impedance matching on USB differential lines, and adherence to timing constraints in firmware. Designers must implement proper reset signaling during enumeration and manage clock accuracy within ±0.25% to meet USB specifications. Additionally, since USB draws higher current during connection events, robust brown-out detection and voltage monitoring are essential to prevent erratic behavior.

What is the impact of the 18KB RAM size on real-time control tasks when using the MSP430F6638IPZ?: With only 18KB of RAM available, memory footprint management becomes critical for complex applications such as motor control or sensor fusion algorithms. Each interrupt service routine, data buffer, or task stack consumes a significant portion of this limited space. For example, a single 12-bit ADC sample stream at 10 kSPS requires 24 bytes per second, but buffering over several milliseconds can quickly accumulate. Developers should minimize global variables, use static allocation where possible, and avoid dynamic memory allocation in time-critical sections. Partitioning data into smaller chunks and leveraging flash-based lookup tables instead of large arrays can help conserve RAM while maintaining performance.

How do the 74 GPIO pins of the MSP430F6637IPZR compare to other MSP430F6xx series microcontrollers in terms of peripheral sharing and flexibility?: Compared to smaller variants like the MSP430F6636 (66 I/O), the MSP430F6637IPZR offers more general-purpose pins, which enhances system scalability. However, like all MSP430 devices, many peripherals—including timers, comparators, and ADCs—share pin functions. This multiplexing means that increasing usable GPIO often comes at the cost of reduced dedicated functionality unless carefully managed. Designers benefit from using Port Mapping (via PMAP registers) to reassign peripherals dynamically, but this adds firmware complexity. In contrast, larger packages such as the 128-pin version offer even more pins but may not be necessary for moderate I/O requirements, making the 100-LQFP a balanced choice for medium-density applications.

Can the MSP430F6637IPZR operate reliably in industrial environments with temperature fluctuations, and how does its operating range compare to commercial-grade alternatives?: Yes, the MSP430F6637IPZR is rated for -40°C to +85°C, which meets standard industrial temperature requirements. This extended range surpasses most commercial-grade MCUs limited to 0°C to 70°C. The wider range ensures stable operation in automotive edge cases, outdoor sensors, or factory automation where ambient conditions vary significantly. However, reliability under thermal stress depends not only on the MCU itself but also on PCB materials, solder integrity, and power delivery stability. Engineers should still perform worst-case analysis, including derating voltage margins and verifying oscillator performance across extremes, especially when relying on internal clocks for precision timing.

What role does the internal oscillator play in the MSP430F6637IPZR’s power-saving modes, and when should an external crystal be preferred?: The MSP430F6637IPZR features a calibrated internal DCO (Digitally Controlled Oscillator) that allows fast wake-up from low-power modes like LPM3.5 or LPM4.5, reducing latency compared to external crystals. However, the internal oscillator typically has ±1% to ±2% accuracy, which may be insufficient for USB, RF communications, or precision timing. In such cases, an external 4–32 MHz crystal provides better stability and meets USB 2.0 timing requirements. Designers must weigh startup time against accuracy: if sub-millisecond response is needed, the DCO suffices; for long-term reliability in clock-sensitive protocols, an external resonator is advisable despite added board space and cost.

How does the 20MHz core speed affect real-time responsiveness versus power consumption in battery-powered IoT nodes using the MSP430F6637IPZR?: Running at 20MHz enables fast signal processing and quick execution of interrupt handlers, improving real-time performance for tasks like pulse counting or UART handling. Yet, higher frequency increases active current draw—typically 250 µA/MHz in active mode. In a typical sleep-to-active cycle, this can dominate total energy budget. To optimize efficiency, developers should keep execution times short and return to low-power modes promptly. Using the MCU’s DMA to offload data movement further reduces CPU load and saves power. Compared to slower MSP430 variants, the MSP430F6637IPZR trades peak speed for versatility, making it suitable for applications needing both responsiveness and energy awareness.

Is it feasible to use the MSP430F6637IPZR for CAN bus communication, and what modifications or additions are required?: No, the MSP430F6637IPZR lacks a native CAN controller. While it supports LINbus and SCI/UART, implementing CAN requires either adding an external transceiver paired with bit-banging software stacks or selecting a different microcontroller with integrated CAN. Software-based CAN is possible but demands precise timing and interrupts, which may exceed real-time constraints. Given the absence of dedicated modules, designers considering automotive or industrial networks should evaluate alternatives like the MSP430FRxx series with FRAM or devices featuring CAN-FD. Thus, the MSP430F6637IPZR is better suited for non-CAN serial protocols such as SPI or I²C.

How does flash memory endurance influence application longevity when reprogramming frequently on the MSP430F6637IPZR?: The MSP430F6637IPZR uses standard floating-gate FLASH with typical write/erase cycles around 10,000 to 100,000 depending on process node and usage patterns. For firmware updates occurring once every few months, this poses little risk. However, frequent mass erasure—such as in field-programmable calibration routines—can degrade memory over time. Best practice involves minimizing writes by batching updates, storing data in EEPROM-like areas (if available), or using wear-leveling techniques. Since the MSP430F6637IPZR lacks built-in wear leveling, external logging to non-volatile storage (e.g., FRAM or flash sectors marked as read-only post-production) is recommended for high-write environments.

What are the key trade-offs between using the internal 16-channel ADC versus external precision ADCs in measurement systems based on the MSP430F6637IPZR?: The integrated 16-channel, 12-bit ADC offers convenience, low cost, and minimal external components, with sampling rates up to 200 ksps. It supports internal references and channel scanning, ideal for multi-sensor monitoring. However, its effective resolution may be limited by noise, gain drift, and lack of external reference options. External ADCs like the ADS1256 provide higher precision (±0.1%), lower noise, and better linearity but increase BOM cost and board complexity. For applications requiring <0.1% accuracy or multiple simultaneous inputs, an external solution may be justified. Otherwise, the MSP430F6637IPZR’s ADC strikes a reasonable balance for moderate-precision analog front ends.

How does the presence of DMA improve system efficiency in data-intensive applications using the MSP430F6637IPZR?: The MSP430F6637IPZR includes DMA channels that allow peripherals like USART, ADC, and timers to transfer data directly to/from memory without CPU intervention. This reduces interrupt overhead, prevents missed samples during high-speed transfers, and frees the CPU for control logic or computations. For instance, continuous ADC streaming at 100 ksps would otherwise monopolize the CPU. By configuring DMA triggers from ADC end-of-conversion signals, data moves autonomously into RAM buffers. This capability is particularly valuable in USB applications, where bulk transfers demand predictable timing and low jitter—both enhanced by DMA-driven packet assembly and transmission.

What considerations apply when interfacing the MSP430F6637IPZR with USB hosts, and how does its USB module behave during hot-plug scenarios?: During USB enumeration, the MSP430F6637IPZR must respond within mandated timeframes and correctly report descriptors. Hot-plugging requires robust ESD protection, proper pull-up/pull-down resistor placement, and power sequencing compliance. If the host disconnects abruptly, the MCU must detect VBUS loss via external circuitry or monitor internal status bits and reinitialize accordingly. Firmware should handle unexpected resets gracefully, avoiding infinite loops or corrupted states. Additionally, since USB draws up to 500 mA (for full-speed peripherals), the power supply must sustain this load without dropping below 4.4 V. Without onboard regulators, designers must ensure clean, well-filtered 5V input to maintain reliable operation across plug/unplug cycles.

How does the choice of package—specifically the 100-LQFP (14x14)—affect thermal dissipation and signal routing in compact designs using the MSP430F6637IPZR?: The 100-LQFP provides 74 I/Os in a relatively small footprint, facilitating dense layouts. However, its fine-pitch leads (0.5 mm pitch) demand careful PCB design to avoid crosstalk and ensure manufacturability. Thermal performance is modest due to limited exposed pads; without thermal vias or copper pours, junction temperatures can rise during prolonged high-load operation. Signal integrity requires attention to high-speed traces like USB D+/D−, which should be length-matched and impedance-controlled. Compared to QFN packages, the LQFP offers easier inspection and rework but trades off some miniaturization potential. For most applications, the MSP430F6637IPZR in 100-LQFP strikes a practical balance between functionality and assembly feasibility.

What limitations exist regarding code density and compiler optimization when developing C applications for the MSP430F6637IPZR?: As a 16-bit RISC architecture, the MSP430F6637IPZR executes instructions efficiently but lacks advanced features like SIMD or wide registers, limiting certain algorithmic optimizations. Code density can suffer compared to ARM Cortex-M series, requiring more instructions for complex operations. Compilers like TI’s CCS or GCC produce reasonably efficient output, but hand-tuned assembly remains beneficial for critical loops. Additionally, interrupt latency and context-switch overhead are higher than in newer architectures, affecting real-time guarantees. Despite these constraints, the MSP430F6637IPZR’s linear instruction set and rich peripheral integration make it highly effective for structured, event-driven firmware common in embedded control.

How does the absence of onboard EEPROM affect data persistence strategies in systems using the MSP430F6637IPZR?: Unlike some MSP430 variants with embedded EEPROM, the MSP430F6637IPZR relies solely on FLASH for non-volatile storage. While FLASH can store configuration parameters, frequent writes risk premature wear. Therefore, critical settings should be written sparingly—ideally during initialization or infrequent update windows. Alternatives include storing data in reserved flash sectors marked as read-only after programming or integrating external FRAM or battery-backed SRAM. Another approach leverages the MCU’s ability to emulate EEPROM-like behavior using flash blocks with wear mitigation, though this requires custom firmware to manage erase cycles. Designers must plan persistence carefully to extend system lifespan beyond the flash endurance limit.

What are the implications of the MSP430F6637IPZR’s voltage range (1.8V–3.6V) when driving legacy 5V logic levels or sensors?: Operating between 1.8V and 3.6V means the MSP430F6637IPZR cannot natively drive 5V TTL-compatible inputs or outputs without level-shifting circuitry. Attempting direct connection may result in undefined states or damage. Solutions include bidirectional level translators, open-drain configurations with pull-up resistors to 5V, or using MOSFET-based shifters. Conversely, interfacing with 3.3V sensors is straightforward if both devices share the same rail. When designing mixed-voltage systems, isolation between domains and careful signal routing become essential. The MSP430F6637IPZR’s I/Os tolerate up to Vcc + 0.3V, but exceeding absolute maximum ratings risks permanent failure.

How does the watchdog timer configuration affect system robustness in safety-critical applications using the MSP430F6637IPZR?: The MSP430F6637IPZR includes a windowed watchdog timer (WDT+) that enforces periodic software acknowledgments. Proper setup ensures recovery from hangs caused by unhandled exceptions or infinite loops. However, misconfiguration—such as disabling the WDT without proper safeguards—can mask faults. In safety-oriented designs, the WDT should be initialized early, fed from a stable clock source, and paired with brown-out detection and power-on reset monitoring. Unlike lockup mechanisms in more modern MCUs, the MSP430F6637IPZR lacks hardware task monitoring, so software must explicitly manage timing and error states. Redundant checks and graceful degradation enhance reliability beyond what the WDT alone provides.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments MSP430F6637IPZR

Product Attribute
Part Number	MSP430F6638IPZR	MSP430F6637IPZ	MSP430F6636IPZR	MSP430F6635IPZR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Oscillator Type	-	-	-	-
Core Processor	-	-	-	-
Program Memory Type	-	-	-	-
Peripherals	-	-	-	-
Speed	-	-	-	-
Connectivity	-	-	-	-
Number of I/O	-	-	-	-
Series	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Program Memory Size	-	-	-	-
RAM Size	-	-	-	-
Core Size	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Data Converters	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
EEPROM Size	-	-	-	-

MSP430F6637IPZR Datasheet PDF

Download MSP430F6637IPZR pdf datasheets and Texas Instruments documentation for MSP430F6637IPZR - Texas Instruments.

PCN Design/Specification: MSP430F54yy/F6yy Datasheet Update 26/Aug/2013.pdf Mult Dev Datasheet Rev 17/Dec/2018.pdf
PCN Other: 2.73KHz.pdf
HTML Datasheet: MSP430F663x Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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