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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersMC908MR32CFUE
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MC908MR32CFUE - NXP USA Inc.

Manufacturer Part Number
MC908MR32CFUE
Manufacturer
NXP Semiconductors
Allelco Part Number
32D-MC908MR32CFUE
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,318 pcs available, New & Original
Parts Description
IC MCU 8BIT 32KB FLASH 64QFP
Package
64-QFP (14x14)
Data sheet
MC908MR32CFUE.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 9318
  • Unit Price: $10.98
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $10.98 $10.98
10+ $10.59 $105.90
30+ $9.90 $297.00
100+ $9.31 $931.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

MC908MR32CFUE Tech Specifications
NXP USA Inc. - MC908MR32CFUE technical specifications, attributes, parameters and parts with similar specifications to NXP USA Inc. - MC908MR32CFUE

Product Attribute Attribute Value
Manufacturer NXP Semiconductors
Voltage - Supply (Vcc/Vdd) 4.5V ~ 5.5V
Supplier Device Package 64-QFP (14x14)
Speed 8MHz
Series HC08
RAM Size 768 x 8
Program Memory Type FLASH
Program Memory Size 32KB (32K x 8)
Peripherals LVD, POR, PWM
Package / Case 64-QFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 44
Mounting Type Surface Mount
EEPROM Size -
Data Converters A/D 10x10b
Core Size 8-Bit
Core Processor HC08
Connectivity SCI, SPI
Base Product Number MC908

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

Parts Introduction

MC908MR32CFUE Image
MC908MR32CFUE (1)

Manufacturer Part Number

MC908MR32CFUE

Manufacturer

NXP Semiconductors

Introduction

The MC908MR32CFUE is an embedded microcontroller from NXP's HC08 series tailored for a varied range of applications.

Product Features and Performance

Core Processor: HC08

8-bit core size for efficient processing

Operating speed of 8MHz

Serial Communication Interface (SCI) and Serial Peripheral Interface (SPI) for connectivity

Integrated peripherals including Low Voltage Detect (LVD), Power-On Reset (POR), and Pulse Width Modulation (PWM)

44 input/output ports for extensive interfacing

On-chip 32KB FLASH memory for program storage

768 bytes of internal RAM

A/D converter with 10 channels of 10 bits resolution

Internal oscillator simplifying circuit design

Designed for surface mount technology with a 64-QFP package

Product Advantages

Robust interface options for flexible connectivity

Adequate memory resources for complex operations

Integrated peripherals reduce external component requirements

Ability to operate in extreme temperature conditions

Reliability assured by NXP's quality manufacturing

Key Technical Parameters

Speed: 8MHz

Program Memory Size: 32KB

RAM Size: 768 x 8

Voltage Supply: 4.5V to 5.5V

Operating Temperature: -40°C to 85°C

64-QFP (14x14) device package

Quality and Safety Features

Includes LVD for battery-powered applications to prevent data loss

POR for system stability during power up

Compatibility

Compatible with surface mount technology equipment

Universal use with various SPI and SCI peripherals

Application Areas

Industrial control systems

Consumer electronics

Automotive applications

Communication devices

Product Lifecycle

Not for new designs (legacy product)

Inquiry for availability of replacements or upgrades is advisable

Several Key Reasons to Choose This Product

Trusted manufacturer with proven track record in embedded microcontrollers

Diverse onboard features reduce additional component needs and system complexity

Versatile use across multiple applications, including harsh environments

Support for legacy systems in need of specific series microcontrollers

Sufficient computational capabilities for a wide range of tasks

Frequently Asked Questions(FAQ)

What are the key architectural trade-offs when selecting the MC908MR32CFUE for an 8-bit embedded control application compared to more modern 32-bit alternatives?
The MC908MR32CFUE employs an HC08 core operating at 8 MHz, which limits instruction throughput to approximately 1 MIPS under typical conditions. While this is sufficient for basic real-time control tasks such as motor sequencing or sensor polling, it lacks the computational headroom and memory addressing capabilities of 32-bit ARM Cortex-M0+ or RISC-V-based MCUs. Designers gain simplicity, lower power in idle states, and deterministic timing—critical in safety-locked industrial loops—but sacrifice floating-point performance, advanced debugging features, and scalability. The 32KB FLASH and 768-byte RAM constrain complex state machines or protocol stacks, making the MC908MR32CFUE best suited for cost-sensitive, functionally bounded systems where upgrade paths are not anticipated.
How does the internal oscillator in the MC908MR32CFUE impact timing accuracy in precision sensor sampling applications?
The MC908MR32CFUE relies on an internal RC oscillator with a typical accuracy of ±2% over the industrial temperature range (-40°C to 85°C), which may introduce timing drift in time-critical A/D conversions or communication baud rates. For example, when using the 10-bit ADC with a 10-channel multiplexer, sampling intervals calibrated to 100 µs could vary by up to ±2 µs, potentially affecting signal integrity in high-noise environments. Engineers implementing time-sensitive protocols like SPI daisy-chaining or SCI-based UART communication should consider external crystal stabilization or periodic calibration routines if tighter synchronization is required.
Can the MC908MR32CFUE support real-time motor control using its PWM peripheral, and what are the limitations in resolution and frequency?
Yes, the MC908MR32CFUE integrates PWM modules capable of generating control signals for brushed DC or stepper motors. With an 8 MHz system clock, the PWM resolution is constrained by the timer prescaler and period register settings. For instance, a 10-bit effective resolution yields approximately 7.8 kHz PWM frequency when using a 1:1 prescaler—adequate for basic speed regulation but insufficient for high-fidelity sinusoidal drive or low-ripple applications. Dead-time insertion is not hardware-supported, requiring software intervention in bridge-driven topologies, which increases CPU overhead and jitter.
What design considerations are necessary for reliable operation of the MC908MR32CFUE in automotive under-hood environments given its -40°C to 85°C rating?
Although the MC908MR32CFUE is rated for -40°C to 85°C ambient temperature, sustained operation near the upper limit demands careful thermal management due to its 64-QFP package and lack of integrated thermal shutdown. Power dissipation under full I/O load and active FLASH access can elevate junction temperature beyond safe margins if PCB copper area for heat spreading is inadequate. Additionally, voltage transients on the 4.5V–5.5V supply rail—common in automotive environments—require robust filtering and transient voltage suppression, as the internal LVD (Low-Voltage Detect) only triggers reset below ~4.2V, offering limited protection against brownout conditions during cranking events.
How does the absence of EEPROM in the MC908MR32CFUE affect field calibration and parameter storage strategies?
The MC908MR32CFUE lacks dedicated EEPROM, forcing developers to emulate non-volatile storage using reserved sectors of the 32KB FLASH memory. This approach introduces wear-leveling challenges, as FLASH endurance is typically rated for 10,000 write/erase cycles per block. Frequent calibration updates—such as sensor offset corrections or trim values—can prematurely degrade specific memory regions. A common mitigation is to allocate a dedicated 512-byte FLASH block with a circular buffer and checksum validation, but this reduces available program space and increases firmware complexity compared to MCUs with true EEPROM.
What are the implications of the MC908MR32CFUE’s 768-byte RAM size when implementing communication stacks or data buffering?
With only 768 bytes of RAM, the MC908MR32CFUE imposes strict constraints on buffer allocation for SCI or SPI communication. For example, a full-duplex UART interface with 64-byte transmit and receive buffers consumes nearly 16% of available RAM, leaving limited space for application variables, stack, and interrupt contexts. Protocols requiring packet reassembly—such as Modbus RTU or custom binary frames—must use minimal state machines and avoid dynamic memory allocation. Engineers often resort to bit-banged implementations or reduce baud rates to minimize buffer overflow risks, trading off responsiveness for memory efficiency.
How does the MC908MR32CFUE compare to the MC9S08DZ60 in terms of peripheral integration and scalability for mid-tier industrial controllers?
The MC908MR32CFUE offers a simpler feature set compared to the MC9S08DZ60, which includes enhanced timers, more ADC channels, and greater FLASH/RAM capacity. While both share the HC08-derived core architecture, the DZ60 supports 60KB FLASH and 4KB RAM, enabling more complex firmware and RTOS integration. The MR32CFUE’s 44 I/O pins and basic PWM/SCI/SPI peripherals suffice for standalone sensor nodes or actuator drivers, but lack the headroom for field-upgradable firmware or multi-protocol support. Migration between the two is feasible at the source level, but pin compatibility and clocking differences require PCB re-layout.
Is the MC908MR32CFUE suitable for safety-critical applications requiring fault detection and recovery mechanisms?
The MC908MR32CFUE includes foundational safety features such as Power-On Reset (POR), Low-Voltage Detect (LVD), and a watchdog timer, which support basic fault containment. However, it lacks advanced diagnostics like clock monitoring, memory parity checks, or redundant execution units required for ISO 26262 or IEC 61508 compliance. In safety-critical designs, these limitations necessitate external supervision circuits or layered software mitigations. The internal oscillator’s drift and single-point FLASH storage further reduce fault tolerance, making the MC908MR32CFUE more appropriate for non-certified systems where graceful degradation is acceptable.
What PCB layout practices are recommended for the 64-QFP package of the MC908MR32CFUE to ensure signal integrity and manufacturability?
The 64-QFP (14x14 mm) package of the MC908MR32CFUE requires careful attention to pad geometry, solder mask definition, and thermal relief to prevent tombstoning or bridging during reflow. A 0.5 mm pitch demands precise stencil aperture design—typically 90% area ratio with trapezoidal profiles—to ensure consistent solder paste deposition. Ground pins should be connected to a solid ground plane with minimal via inductance, especially for the internal oscillator and ADC reference. Decoupling capacitors (100 nF ceramic) must be placed within 2 mm of VDD pins, and high-speed signal traces (e.g., SPI clock) should be length-matched and routed away from analog inputs to reduce crosstalk.
How does the MC908MR32CFUE’s FLASH memory architecture influence firmware update strategies in deployed systems?
The MC908MR32CFUE’s 32KB FLASH is organized in 512-byte sectors, allowing partial updates without full-chip erase. However, in-application programming (IAP) requires careful management of the FLASH controller registers and temporary suspension of interrupts to prevent corruption. Since the CPU cannot execute from FLASH during write operations, a bootloader must reside in a protected sector or RAM. This limits over-the-air (OTA) update feasibility unless external memory is added. Additionally, the 10,000-cycle endurance necessitates update throttling in frequently reconfigured systems, favoring the MC908MR32CFUE in static-configuration environments like appliance controllers or metering devices.

Parts with Similar Specifications

The three parts on the right have similar specifications to NXP USA Inc. MC908MR32CFUE

Product Attribute MC908MR32VFUE MC908MR32VFUE MC908MR32VFUE-NXP MC908MR16CFUE
Part Number MC908MR32VFUE MC908MR32VFUE MC908MR32VFUE-NXP MC908MR16CFUE
Manufacturer Freescale Semiconductor NXP USA Inc. NXP USA Inc. NXP USA Inc.
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
EEPROM Size - - - -
Program Memory Type - - - -
Series - - - -
Data Converters - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
RAM Size - - - -
Core Processor - - - -
Speed - - - -
Number of I/O - - - -
Oscillator Type - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Peripherals - - - -
Voltage - Supply (Vcc/Vdd) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Connectivity - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Mounting Type - Surface Mount Through Hole Surface Mount
Program Memory Size - - - -
Core Size - - - -

MC908MR32CFUE Datasheet PDF

Download MC908MR32CFUE pdf datasheets and NXP USA Inc. documentation for MC908MR32CFUE - NXP USA Inc..

Datasheets
MC68HC908MR16,32.pdf
PCN Packaging
All Dev Label Update 15/Dec/2020.pdf Mult Dev Pkg Seal 15/Dec/2020.pdf
Environmental Information
NXP USA Inc REACH.pdf NXP USA Inc RoHS Cert.pdf

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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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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
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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MC908MR32CFUE Image

MC908MR32CFUE

NXP USA Inc.
32D-MC908MR32CFUE

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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