MC908MR16CFUE - 8-Bit HC08 MCU 16KB Flash 64-QFP | NXP
MPN: MC908MR16CFUE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.21 | $62.10 |
| 100 | $5.52 | $552.00 |
| 500 | $4.97 | $2,485.00 |
| 1,000 | $4.48 | $4,480.00 |
MC908MR16CFUE Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals such as timers, ADCs, and serial interfaces into one chip. Within the MCU hierarchy, the MC908MR16CFUE belongs to the 8-bit class, based on the enhanced M68HC08 CPU08 CISC core, a low-cost, high-performance architecture developed by Motorola/Freescale under the CSIC (customer-specific integrated circuit) design strategy.
Key features include high-performance M68HC08 architecture, an on-chip analog-to-digital converter, motor-control-oriented peripherals (the MR family targets motor drive applications), up to 44 general-purpose I/O pins depending on package, up to 786 bytes of on-chip RAM, and low-voltage-inhibit (LVI) and power-on-reset (POR) modules. The 16KB FLASH program memory supports in-circuit reprogramming, simplifying field updates.
Architecturally, the CPU08 executes an enhanced HC05 instruction set with stack manipulation and indexed addressing support. The MR family integrates an 8-channel, 10-bit ADC and PWM capability suited to closed-loop motor control, alongside SCI and SPI serial connectivity for system communication. Operation from a 5V supply with an internal clock generator option reduces external component count.
Typical applications include AC induction and DC motor control in appliances, industrial drives, fan controllers, and power tool electronics, where the ADC plus PWM combination enables sensorless control topologies. The serial interfaces also support simple host communication in embedded products.
Design consideration: this part is End of Life per the NXP product page; new designs should evaluate the last-time-buy stock position or the replacement parts identified by NXP's discontinuance notice before committing to a design-in.
This page synthesizes distributor availability data, family cross-references, and lifecycle information not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC908MR16CFUE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC908MR16CFUE (same form factor and footprint) — differing in RAM Size, Program Memory Size, Package / Case, Peripherals, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68HC908MR16CFU
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →MC908MR32CBE
✅ Drop-In✓ In Stock
$7.25 / Unit
View Datasheet →MC908AP32CFBE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC908AP32ACBE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC908GZ32VFUE
✅ Drop-In✓ In Stock
$5.15 / Unit
View Datasheet →MC908GR32ACFUE
✅ Drop-In✓ In Stock
$5.25 / Unit
View Datasheet →MC908AS60AMFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908MR16CFUE Maximum Ratings & Electrical Characteristics
| Core Processor | HC08 (CPU08) CISC |
| Core Size | 8-bit |
| Maximum Clock Frequency | 8 MHz internal bus |
| Program Memory Size | 16KB (16K x 8) FLASH |
| RAM Size | Up to 786 bytes |
| Supply Voltage | 5 V |
| Package / Case | 64-QFP (14x14 mm), PQFP |
| Mounting Type | Surface Mount |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM, ADC |
| Data Bus Width | 8 bit |
| Series | HC08MR |
| General-Purpose I/O | Up to 44 pins (family maximum) |
| Number of Pins | 64 |
| Packaging | Tray |
MC908MR16CFUE 64-qfp (14x14 mm), pqfp Pin Configuration Guide
Pin configuration for MC908MR16CFUE (64-qfp (14x14 mm), pqfp package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC908MR16CFUE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908MR16CFUE is suitable for 6 applications: AC Induction Motor Control, DC Motor and Fan Controllers, Power Tool Electronics, Industrial Embedded Control Nodes, Home Appliance Control Boards, Legacy 5V System Maintenance and Repair.
AC Induction Motor Control
The MC908MR16CFUE was purpose-designed for motor drive applications: its HC08MR family pairs an ADC with PWM outputs so firmware can implement V/F and sensorless scalar control of AC induction motors at an 8MHz bus speed. Operating from a single 5V rail, it interfaces cleanly with IGBT/MOSFET gate drivers whose logic inputs are 5V-compatible, and the 16KB FLASH accommodates typical scalar control firmware with room for protection routines. The LVD and POR modules guard against brown-out misfires of the power stage. Because the part is EOL, new motor designs should use it only for legacy production; the same-family MC908MR32CBE offers 32KB FLASH for vector-control math headroom. PCB reuse of existing MR16 footprints with the MR32 minimizes requalification effort.
Recommended
DC Motor and Fan Controllers
In appliance and HVAC fan controllers, the MC908MR16CFUE reads tachometer or BEMF feedback through its ADC and drives the motor bridge through PWM outputs, enabling speed regulation with modest 8MHz-class compute. The 5V supply matches legacy hall-sensor and comparator thresholds commonly used in these products, and SCI allows optional host communication for speed commands in smart-appliance architectures. The up-to-44 GPIO (package dependent) cover keypad, relay, and LED drive needs without extra logic. Designers should account for the EOL status: units procured from residual stock should have date codes and programming verified, and firmware should be frozen with a validated monitor-based FLASH programming fixture for late-stage updates.
Recommended
Power Tool Electronics
Corded and early cordless power tools use the MC908MR16CFUE for trigger-driven speed control: the ADC samples the trigger potentiometer and current-sense signal, while PWM outputs drive the chopper or inverter stage. The 8MHz HC08 core executes current-limit loops fast enough for universal motor drives, and the 16KB FLASH stores multi-mode firmware (speed presets, soft-start, thermal protection). The POR/LVD combination prevents erratic power-stage gating during battery sag or line dips. Sustained production lines still running this MCU should secure last-time-buy inventory sized to remaining product life, and qualify MC908MR32CBE as a footprint-compatible backup for long-term service parts.
Recommended
Industrial Embedded Control Nodes
For general industrial nodes such as pump controllers, sensor hubs, and small sequencers, the MC908MR16CFUE offers SPI for peripheral expansion (ADCs, EEPROMs, displays) and SCI for RS-485-style links, with the ADC and PWM covering local analog control loops. The 64-QFP 14x14mm package provides generous pin count for discrete I/O at up to 44 GPIO, reducing glue logic on legacy 5V backplanes. Firmware developed under the HC08 toolchain remains maintainable through the monitor-mode programming interface. Because NXP has ended production, integration engineers should treat this part as a maintenance-only component and map future product revisions to the MC9S08 or S12 families.
Recommended
Home Appliance Control Boards
Washer, dishwasher, and small-kitchen-appliance boards built around the MC908MR16CFUE use its ADC to monitor temperature (NTC) and pressure inputs, PWM to drive motors or heaters, and GPIO for user-interface switches and indicators on a 5V rail. The on-chip FLASH supports firmware variants across appliance models from one PCB, and the internal clock generator option trims BOM cost by avoiding a crystal in cost-sensitive SKUs. Service organizations repairing legacy appliances can reprogram the FLASH in-circuit through the monitor interface. With the part EOL, repair inventories should be stocked from surplus distributors, and appliance makers should have already completed migration to the MC9S08 family for current models.
Recommended
Legacy 5V System Maintenance and Repair
The dominant current use of the MC908MR16CFUE is sustaining engineering: repairing and extending the life of installed 5V systems whose firmware was written for the HC08 core. Its 8MHz CPU08 executes legacy object code unchanged, the 64-QFP footprint keeps existing test fixtures valid, and monitor-mode FLASH programming allows field updates without desoldering. Engineers maintaining such systems should verify remaining stock authenticity through authorized surplus channels such as Rochester Electronics inventory listed on DigiKey Marketplace, and maintain a documented migration plan to the pin-compatible MR32 or the HCS08 family before residual inventory depletes. This lifecycle-management role, rather than new design-ins, now defines the part's market.
Recommended
Recommended Products Summary
Engineering reference data for MC908MR16CFUE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68HC908MR16CFU | MC908MR32CBE | MC908AP32CFBE | MC908GZ32VFUE | MC908AS60AMFUE |
|---|---|---|---|---|---|---|
| Package | 64-QFP (14x14 mm) | 64-QFP - same | 64-QFP - same | 64-QFP - same | 64-QFP - same | 64-QFP - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Bus Speed | HC08 CPU08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz |
| FLASH Memory | 16KB | 16KB | 32KB | 32KB | 32KB | 60KB |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Family Focus | Motor control (ADC + PWM) | Motor control | Motor control | General purpose (LED, I2C) | General purpose | Automotive safety |
Key Differentiators
- Purpose-built motor-control peripheral set (vs MC908GP16CBE)
- Smallest FLASH in family keeps legacy code identical (vs MC908MR32CBE)
- 5V noise margin for industrial environments (vs Modern 3.3V MC9S08 parts)
- Honest trade-off: no active lifecycle (vs MC9S08DV128CLF)
Design Notes
The MC908MR16CFUE is End of Life per the NXP product page, which publishes a discontinuance and replacement product change notice. Before any new PCB layout or production build, obtain this PCN and size a last-time-buy covering your product's remaining service life plus attrition. Purchase only through traceable channels (Rochester Electronics stock via DigiKey Marketplace or authorized surplus) - untraceable broker stock of EOL HC08 parts carries meaningful counterfeit and remarked-chip risk.
The device runs from a single 5V rail; decouple each VDD pin pair with 0.1uF ceramic capacitors placed within 5mm of the pins, plus one bulk 4.7-10uF capacitor near the package. The LVD (low-voltage-inhibit) module prevents erratic PWM gating during brown-outs, but do not rely on it alone in motor-drive systems - pair it with an external reset supervisor if the power stage can back-feed the 5V rail. Estimated: on a 14x14mm 64-QFP, a solid ground plane under the package keeps supply impedance low and improves ADC accuracy.
When PWM outputs directly gate power devices, route PWM traces away from ADC input lines to prevent switching noise from corrupting motor current samples; the family ADC is SAR-based and samples synchronously with the bus clock, so triggering ADC conversion during PWM off-time yields cleaner readings. Keep the monitor-mode (MON08) programming pins accessible on a header for in-circuit FLASH reprogramming - burying them under a conformal-coated assembly complicates field updates.
The 64-QFP (14x14mm, 0.5mm pitch) requires solder-mask-defined or non-solder-mask-defined QFP footprints per IPC-7351 practice; verify paste aperture reduction of roughly 10-15% on outer leads to prevent bridging during reflow. Place the crystal or oscillator (if not using the internal clock generator) close to the OSC pins with short ground returns. If migrating to MC908MR32CBE, the land pattern is unchanged - only re-verify the oscillator and peripheral-pin multiplexing assignments in the new datasheet.
Compliance Information
Compliance details were not provided in the verified web data. The NXP product page has an Environmental Quality section that should be consulted directly; note the suffix letter (E in CFUE) may indicate the terminal finish/plating per NXP part-number conventions, but this was not confirmed in the provided data.
