MCF52254CAF66 - ColdFire V2 32-bit MCU, 512KB Flash, 66MHz | NXP
MPN: MCF52254CAF66 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $27.96 | $27.96 |
| 10 | $25.5 | $255.00 |
| 100 | $22.75 | $2,275.00 |
| 500 | $20.1 | $10,050.00 |
| 1,000 | $18.25 | $18,250.00 |
MCF52254CAF66 Overview
A ColdFire V2 MCU is a 32-bit RISC microprocessor core derived from the original Motorola 68000 architecture, optimized for embedded control with deterministic interrupt response and low power consumption. ColdFire MCUs sit in the broader hierarchy of microcontroller -> embedded processor -> 32-bit MCU -> industrial/IoT compute engine. The MCF5225x family is positioned as a highly integrated connectivity MCU, targeting industrial automation, smart energy, and connected device applications that require multiple wired communication interfaces on a single chip.
Key features include 512 KB (512K x 8) FLASH program memory, 66 MHz maximum CPU frequency, integrated 10/100 Ethernet MAC, USB 2.0 Full-Speed On-the-Go, two CAN 2.0B controllers, hardware encryption (DES/3DES/AES/SHA), a 12-bit ADC, and a rich set of timers, UARTs, SPI and I2C peripherals. The integrated peripheral set eliminates external glue logic, reducing BOM cost and PCB area in connected embedded designs. The 100-LQFP package supports industrial temperature grade operation suitable for factory-floor deployment.
From an architectural standpoint, the ColdFire V2 core implements a variable-length RISC instruction set with 32-bit internal data paths. The integrated Fast Ethernet MAC supports both MII and RMII PHY interfaces. The encryption accelerator offloads AES, DES, 3DES, and SHA-1/MD5 operations from software, allowing secure communication stacks to run without overloading the main CPU.
Typical applications include industrial Ethernet gateways, building automation controllers, smart metering, HVAC control, point-of-sale terminals, and CAN-based factory equipment. The combination of USB OTG, Ethernet, and dual CAN makes this MCU a versatile hub for industrial networking.
When designing with this part, allocate sufficient decoupling capacitance near the analog and PLL supply pins. Plan for a stable 25 MHz crystal reference because the Ethernet MAC derives its timing from this source, and follow the ColdFire V2 reference manual for MMU-less memory mapping and interrupt prioritization.
Drop-in alternatives for MCF52254CAF66 — 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 MCF52254CAF66 (same form factor and footprint) — differing in Package, ADC, Supply Voltage, RoHS Status, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF52254AF80
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View Datasheet →MCF52254CAF66 Maximum Ratings & Electrical Characteristics
| Core | ColdFire V2 (32-bit RISC) |
| Maximum CPU Frequency | 66 MHz |
| Program Flash | 512 KB (512K x 8) |
| Package | 100-LQFP (14x14 mm) |
| Pin Count | 100 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Supply Voltage | 3.3 V |
| Ethernet MAC | 10/100 Mbps (MII/RMII) |
| USB | USB 2.0 Full-Speed OTG |
| CAN Controllers | 2x CAN 2.0B |
| ADC | 12-bit |
| Hardware Encryption | DES/3DES/AES/SHA |
| RoHS Status | Compliant (per Heisener distributor listing) |
MCF52254CAF66 100-lqfp (14x14 mm) Pin Configuration Guide
Pin configuration for MCF52254CAF66 (100-lqfp (14x14 mm) 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 MCF52254CAF66.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF52254CAF66 is suitable for 6 applications: Industrial Ethernet Gateway, Building Automation Controller, Smart Energy Metering, HVAC Climate Control, Point-of-Sale (POS) Terminal, CAN-based Factory Equipment.
Industrial Ethernet Gateway
The MCF52254CAF66 is well-suited for industrial Ethernet gateways because it integrates a 10/100 Ethernet MAC with MII/RMII PHY interface, dual CAN 2.0B controllers, and USB 2.0 Full-Speed OTG on a single chip. The ColdFire V2 32-bit core runs industrial TCP/IP and Modbus TCP stacks with deterministic latency, while the hardware AES/DES/SHA engine secures fieldbus-to-cloud uplinks. In typical designs, the MCU sits between a PHY transceiver and downstream RS-485 or CAN nodes, eliminating an external network processor and reducing BOM cost for DIN-rail mounted gateways.
Recommended
Building Automation Controller
The MCF52254CAF66 fits building automation controllers that aggregate BACnet, KNX, and Modbus fieldbus traffic. Its dual CAN 2.0B ports drive two independent fieldbus segments simultaneously, while the 512 KB Flash stores large protocol stacks. The 12-bit ADC reads temperature, humidity, and CO2 sensor outputs directly. Operating from -40C to +85C, it handles unconditioned mechanical-room environments. A single MCU can replace a separate MCU plus external CAN transceiver logic, simplifying the controller PCB.
Recommended
Smart Energy Metering
For smart electricity, water, or gas metering, the MCF52254CAF66 delivers the security, connectivity, and deterministic timing required by AMI (Advanced Metering Infrastructure). Hardware AES/SHA offloads TLS handshake for encrypted DLMS/COSEM or ANSI C12.18 communications. The 10/100 Ethernet MAC supports wired AMI backhaul, while the USB OTG port enables local maintenance interfaces. With 512 KB Flash, metering firmware plus DLMS stack fits without external memory. Real-time metrology counters remain accurate thanks to ColdFire V2's deterministic interrupt response.
Recommended
HVAC Climate Control
The MCF52254CAF66 drives HVAC climate control boards where multiple sensor inputs, actuator PWMs, and fieldbus connectivity must be coordinated in real time. Its UART, SPI, and I2C channels connect to temperature, pressure, and flow sensors, while CAN provides inter-board communication with chiller or AHU controllers. The 12-bit ADC samples analog channels with sufficient resolution for thermistor linearization. Free MQX RTOS enables multi-threaded HVAC firmware, and the 100-LQFP package is straightforward to hand-rework on legacy control boards.
Recommended
Point-of-Sale (POS) Terminal
The MCF52254CAF66 serves POS terminals needing USB device connectivity, secure transaction processing, and rich peripheral IO. USB 2.0 Full-Speed OTG connects to barcode scanners, cash drawers, and receipt printers. Hardware AES/3DES accelerates EMV chip-card crypto without burdening the main CPU. The Ethernet MAC provides LAN connectivity for back-office synchronization, and dual CAN ports are available for inter-terminal networking in fuel-station dispensers. 512 KB Flash holds payment application firmware plus secure storage area.
Recommended
CAN-based Factory Equipment
The MCF52254CAF66 is a strong choice for CAN-based factory equipment such as motor drives, sensor hubs, and remote IO blocks. Dual CAN 2.0B controllers support simultaneous communication on two independent CANopen or DeviceNet networks. The ColdFire V2 core executes fieldbus state machines with deterministic cycle times, and the hardware encryption engine secures machine-to-cloud telemetry. The 100-LQFP package supports industrial -40C to +85C operation in sealed cabinet environments, and the 512 KB Flash handles CANopen stack plus application firmware.
Recommended
Recommended Products Summary
Engineering reference data for MCF52254CAF66 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF52254AF80 | MCF52259 | MCF52236AF50 | MCF52233CAL60 | MCF5211CAE66 |
|---|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP - same family | 100-LQFP - same package |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | ColdFire V2 | ColdFire V2 | ColdFire V2 | ColdFire V2 | ColdFire V2 | ColdFire V1 |
| Maximum CPU Frequency | 66 MHz | 80 MHz | 66 MHz | 50 MHz | 60 MHz | 66 MHz |
| Ethernet MAC | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| USB | USB 2.0 OTG FS | USB 2.0 OTG FS | USB 2.0 OTG FS | USB 2.0 OTG FS | USB 2.0 OTG FS | USB 2.0 OTG FS |
| CAN Controllers | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B | 1x CAN 2.0B |
| Hardware Encryption | DES/3DES/AES/SHA | DES/3DES/AES/SHA | DES/3DES/AES/SHA | DES/3DES/AES/SHA | DES/3DES/AES/SHA | Not available |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Faster CPU clock than MCF52236AF50 while keeping the same peripheral set (vs MCF52236AF50)
- More complete peripheral mix than MCF5211CAE66 (vs MCF5211CAE66)
- Cost-balanced 66 MHz sweet spot vs MCF52254AF80 (vs MCF52254AF80)
Design Notes
The MCF52254CAF66 operates from a single 3.3 V supply but requires separate analog and PLL supply pins (VDDA, VDDPLL) that must be filtered with ferrite beads and bypassed with 100 nF ceramic capacitors. Place the ferrite within 5 mm of the supply pin. The internal voltage regulator generates the core voltage from the 3.3 V rail; ensure adequate bulk capacitance on VDD (typically 10 uF) to handle ColdFire V2 core load transients during DMA bursts.
The Ethernet MAC's MII/RMII traces to the PHY must be length-matched within 50 mil and routed over a continuous ground plane to meet IEEE 802.3 timing margins. Keep the 25 MHz external crystal within 5 mm of the XTAL pins with a guarded ground ring, since Ethernet PHY timing derives from this reference. USB DP/DM traces require 90-ohm differential impedance and should not cross any other high-speed signals on the PCB.
Estimated: At maximum CPU activity (66 MHz, all peripherals active, 3.3 V supply), the MCF52254CAF66 dissipates approximately 0.5 to 0.8 W into the 100-LQFP package. With theta_JA around 45 C/W for a standard JEDEC 4-layer board, junction temperature rises 22 to 36 C above ambient. Industrial-grade 85 C ambient operation is comfortable, but for sealed enclosures with restricted airflow, add thermal vias under the exposed pad and copper pours on inner layers.
Do not assume the MCF52254CAF66 is software-compatible with newer Kinetis Cortex-M parts - the ColdFire V2 instruction set is distinct and requires NXP-specific toolchains (CodeWarrior, CodeWarrior for ColdFire, or GCC with ColdFire support). Firmware porting to ARM Cortex-M requires full re-implementation. Also, when migrating from the older MCF52252 (ROM-based), note that the 'F' suffix indicates FLASH-based boot, requiring a different boot mode configuration.
Compliance Information
RoHS and REACH compliance per Heisener distributor listing. AEC-Q100 not applicable (industrial, not automotive qualified). Halogen-free status and conflict-minerals declaration not listed in available web data - left as unknown.