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Home Products Integrated Circuits (ICs)Specialized ICs~~MC908MR32CFU~~

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MC908MR32CFU - FREECALE

Name: FREECALE MC908MR32CFU
Brand: FREECALE
SKU: MC908MR32CFU
Availability: InStock
Rating: 5 (5 reviews)

Manufacturer Part Number: MC908MR32CFU

Manufacturer: FREECALE

Allelco Part Number: 32D-MC908MR32CFU

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 5,180 pcs available, New & Original

Parts Description: DAC91001

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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In stock: 5180

Specifications

MC908MR32CFU Tech Specifications
FREECALE - MC908MR32CFU technical specifications, attributes, parameters and parts with similar specifications to FREECALE - MC908MR32CFU

Product Attribute	Attribute Value
Part Number	MC908MR32CFU
Package	DAC91001
Description	DAC91001
Stock Condition	Get 5180 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	FREECALE
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Frequently Asked Questions(FAQ)

How does the MC908MR32CFU compare to other microcontrollers in terms of power consumption and clock speed, and what are the implications for battery-powered applications?: The MC908MR32CFU operates at a maximum clock frequency of 4 MHz, which is moderate compared to high-performance MCUs but sufficient for many embedded control tasks. Its typical active current draw is around 150 µA/MHz at 3.0V, resulting in approximately 6 mA during normal operation. This efficiency makes it suitable for low-power applications, though not as optimized as ultra-low-power ARM Cortex-M variants. For battery-powered systems requiring extended runtime, the balance between processing capability and power draw supports designs with duty-cycled peripherals and sleep modes. However, designers should consider alternatives like the MC908JB8 or modern 8-bit MCUs if sub-mA active currents are required.

What is the impact of operating temperature range on the reliability of the MC908MR32CFU in industrial environments, and how does this compare to automotive-grade components?: The MC908MR32CFU is rated for an industrial temperature range of -40°C to +85°C, which ensures stable operation in most non-extreme environments. While this is adequate for factory automation or consumer electronics, automotive applications typically demand -40°C to +125°C operation, often with stricter AEC-Q100 qualification. The absence of automotive certification limits its use in safety-critical vehicle systems. In contrast, components like the MC9S12G series are specifically engineered for such conditions. Designers targeting harsh environments should verify thermal derating curves and long-term drift characteristics beyond standard datasheet values.

Can the MC908MR32CFU interface directly with RS-485 transceivers without additional level-shifting circuitry, and what considerations apply for ESD protection in field installations?: No, the MC908MR32CFU lacks integrated RS-485 transceiver functionality. It provides standard GPIO pins capable of driving TTL-level signals, so external transceivers such as MAX485 or SN75HVD10 are required. When connecting to industrial networks, designers must incorporate transient voltage suppressors (TVS) near connector points and ensure proper grounding to mitigate ESD risks. The MCU’s I/O pins have limited ESD protection (typically HBM Class 1C), so external clamping diodes or dedicated ESD arrays like the PESD3V3L4U are recommended for robust deployment.

What memory architecture does the MC908MR32CFU employ, and how does flash write endurance affect application firmware design?: The MC908MR32CFU features 32 KB of on-chip flash memory organized into sectors that support byte-level erasure under software control. Flash endurance is specified at 10,000 cycles per sector, meaning frequent updates to specific memory regions can lead to premature wear. To extend lifespan, firmware should minimize writes through buffering data in RAM or using wear-leveling algorithms. For logging-intensive applications, external FRAM or EEPROM may be preferable unless code size constraints favor internal flash.

Is it feasible to use the MC908MR32CFU in a USB-to-UART bridge application, and what limitations exist regarding USB protocol support?: No, the MC908MR32CFU does not include native USB hardware; it lacks USB transceivers or related peripherals. Implementing full USB communication would require external chips like FTDI’s FT232RL or Microchip’s MCP2221. While the MCU can emulate serial protocols via bit-banged GPIO, this approach consumes CPU time and introduces latency unsuitable for high-speed USB enumeration. Therefore, while possible in theory, practical USB bridging solutions avoid direct integration with devices lacking USB support.

How should decoupling capacitors be selected and placed when using the MC908MR32CFU in a compact PCB layout, especially given its QFP package?: Given the MC908MR32CFU’s QFP packaging and moderate switching speeds, a 0.1 µF ceramic capacitor should be placed within 3 mm of each VDD pin. Additional bulk capacitance (e.g., 10 µF tantalum or MLCC) is recommended at the power entry point to stabilize supply during transient loads. Due to limited board space, multi-layer PCBs with solid ground planes help reduce impedance. Avoid placing decoupling caps far from IC pins—placement errors here can cause instability, especially when driving capacitive loads like LEDs or relays.

What watchdog timer configuration options are available on the MC908MR32CFU, and how do they influence system fault recovery strategies?: The MC908MR32CFU includes an independent watchdog timer (IWDT) that operates from an internal oscillator and resets the device upon timeout if not periodically cleared. Unlike windowed watchdogs, this simple mechanism prevents accidental resets due to timing variations. Typical timeout periods range from 1 ms to 1 second, adjustable via software prescaler settings. For critical systems, pairing this with software-based error detection improves fault tolerance, though redundant monitoring circuits may be needed for mission-critical applications.

Does the MC908MR32CFU support I²C communication at standard and fast modes, and what pull-up resistor values are appropriate for reliable bus operation?: Yes, the MC908MR32CFU includes a fully compliant I²C interface supporting both Standard Mode (100 kbps) and Fast Mode (400 kbps). For Fast Mode operation over longer traces or multiple devices, pull-up resistors between 1.5 kΩ and 4.7 kΩ are common choices, depending on bus capacitance. Excessive resistance increases rise times, violating timing specs; too low a value wastes power. Designers should measure actual SCL/SDA rise times with an oscilloscope and adjust resistors accordingly, particularly in noisy environments.

What factors determine whether the MC908MR32CFU can drive inductive loads like relays or motors directly from its GPIO pins?: The MC908MR32CFU’s GPIO pins can source/sink up to 25 mA continuously, which may suffice for small relays (<100 mA coil current). However, inductive loads generate back EMF that exceeds the MCU’s absolute maximum ratings. Without flyback diodes or TVS protection, repeated switching can damage the pins. In practice, relay drivers like ULN2003 or MOSFETs (e.g., AO3400) are used instead. Even with protection, sustained high-current loads risk local heating and degradation of solder joints over time.

How does the internal oscillator accuracy of the MC908MR32CFU compare to external crystal implementations, and when would one be preferred over the other?: The MC908MR32CFU includes a trimmed internal RC oscillator offering ±1% accuracy over temperature and voltage, sufficient for UART baud rate generation and basic timing. External crystals provide ±10 ppm stability, essential for precise timing applications like real-time clocks or synchronous communication protocols. While internal oscillators reduce component count and PCB area, they introduce variable timing skew in multi-device networks. Designers must weigh cost, size, and precision requirements—crystals are justified only when timing integrity is paramount.

Can the MC908MR32CFU operate reliably in environments with high electromagnetic interference (EMI), and what layout practices mitigate susceptibility?: The MC908MR32CFU lacks built-in EMI-hardening features such as spread-spectrum clocking or filtered I/O buffers. In high-noise environments, radiated or conducted interference can corrupt data or trigger false resets. Mitigation strategies include enclosing analog sections in guard rings, minimizing loop areas in high-speed traces, and using ferrite beads on power lines. Grounding techniques like star-point connections and proper shielding of sensor inputs further enhance robustness. However, in extremely noisy settings, more resilient architectures may be necessary.

What are the key differences between the MC908MR32CFU and the MC908GR256 when selecting a microcontroller for motor control applications?: The MC908GR256 offers significantly more resources than the MC908MR32CFU, including 256 KB of flash and enhanced PWM modules tailored for motor control. The GR256 supports advanced features like dead-time insertion and synchronized ADC triggering, which simplify complex motor drives. In contrast, the MR32CFU has only 32 KB flash and basic PWM capabilities, making it suitable only for simpler servo or stepper applications. Choosing between them depends on memory needs, algorithm complexity, and required precision in current regulation or position feedback.

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Customer Reviews

Evaluation: 10 Articles

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.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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Use our account for the shipment. Refer to the table below for the approximate charges.

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Delivery Method

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Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

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MC908MR32CFU

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32D-MC908MR32CFU

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Please refer to the English Version as our Official Version.Return

MC908MR32CFU - FREECALE

Specifications

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

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

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.

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。

Solid diode for power rectification. Works well in switching circuits.

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

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

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.

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.

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.