MCF5307AI66B - ColdFire V3 32-bit 66MHz MCU | NXP
MPN: MCF5307AI66B ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $36.49 | $36.49 |
| 10 | $36.49 | $364.90 |
| 100 | $36.49 | $3,649.00 |
| 500 | $36.49 | $18,245.00 |
| 1,000 | $36.49 | $36,490.00 |
MCF5307AI66B Overview
A ColdFire microprocessor is a 32-bit embedded processor derived from the Motorola 68000 (M680x0) architecture. The ColdFire family spans the V1 through V4 core generations, sitting within the broader hierarchy of CISC-heritage embedded processors used in industrial control, networking, and instrumentation. The V3 core in the MCF5307 executes the ColdFire instruction set with a multiply-accumulate (MAC) module for DSP-style arithmetic, delivering approximately 70 MIPS of sustained performance for embedded control applications.
Key features of the MCF5307 include a highly integrated system-on-chip design combining the V3 core with a DRAM controller, a direct memory access (DMA) controller, programmable interrupt controller, timers, parallel interface, and serial interfaces including I2C and UART/USART. The 4 KB internal SRAM can be used as tightly-coupled scratchpad memory for time-critical code or data, reducing bus traffic on the external bus interface (EBI/EMI).
Technically, the MCF5307 is ROMless: program code executes from external flash or DRAM via the integrated DRAM controller and external bus interface. Peripherals include DMA, power-on reset (POR), and a watchdog timer (WDT). Sixteen general-purpose I/O lines are available, and the processor operates as a single-core 32-bit device at 66 MHz, offering a cost-effective balance of performance and integration for legacy embedded designs.
Typical applications include industrial embedded control systems, factory automation controllers, networking equipment line cards, and legacy instrumentation upgrades where existing ColdFire code bases must be maintained.
A key design consideration is that the MCF5307AI66B is designated End-of-Life by NXP and is Not Recommended for New Designs; new projects should evaluate ColdFire successors such as the MCF52xx or MCF53xx family variants, and existing designs should plan last-time-buy inventory strategies.
This page synthesizes distributor pricing, availability from multiple sources, and lifecycle status information not consolidated in the manufacturer product listing.
Drop-in alternatives for MCF5307AI66B — 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 MCF5307AI66B (same form factor and footprint) — differing in On-chip SRAM, Performance, Core, Data Bus Width, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF5307CAI66B
✅ Drop-In✓ In Stock
$34.8 / Unit
View Datasheet →MCF5307AI66B Maximum Ratings & Electrical Characteristics
| Core Processor | ColdFire V3 (MCF530x) |
| Core Size | 32-Bit |
| Maximum Clock Speed | 66 MHz |
| Performance | 70 MIPS |
| Program Memory Type | ROMless |
| RAM Size | 4 KB SRAM |
| Connectivity | EBI/EMI, I2C, UART/USART |
| Peripherals | DMA, POR, WDT |
| Number of I/O | 16 |
| DRAM Controller | Yes (integrated) |
| MAC Module | Yes (multiply-accumulate) |
| Package | 208-FQFP (28x28 mm) |
| Mounting Type | Surface Mount |
| Part Status | End of Life / Not For New Designs |
MCF5307AI66B 208-fqfp (28x28 mm) Pin Configuration Guide
Pin configuration for MCF5307AI66B (208-fqfp (28x28 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 MCF5307AI66B.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF5307AI66B is suitable for 6 applications: Industrial Embedded Control, Networking Equipment, Test and Measurement Instrumentation, Legacy System Sustainment and Repair, Motor Control and Automation Nodes, Building Automation and Access Control.
Industrial Embedded Control
The MCF5307AI66B was purpose-built for embedded control: according to NXP, it is a high-performance, cost-effective, highly integrated microprocessor delivering approximately 70 MIPS at 66 MHz. The integrated DRAM controller and external bus interface allow a minimal two-chip solution (processor plus DRAM/flash), while the DMA controller offloads data movement between UART and memory, keeping the ColdFire V3 core free for control-loop computation. In industrial controllers that already run ColdFire V3 code bases, replacing the MCF5307AI66B with the same part preserves the software investment entirely. The watchdog timer and power-on reset provide the supervision needed in unattended factory equipment. Because the part is now End-of-Life, industrial users should secure stock for the remaining service life of their controller platforms.
Recommended
Networking Equipment
The MCF5307AI66B suits board-level management and line-card control in networking equipment such as routers, switches, and hubs. Its external bus interface (EBI/EMI) drives external memory and peripheral ASICs, while dual UARTs and I2C connect to management PHYs, EEPROM, and console ports. The DMA controller moves packet-status data without core intervention, and the MAC module accelerates checksum-style arithmetic. The 4 KB internal SRAM serves as a scratchpad for interrupt service routines, keeping deterministic response times for management traffic. Since the device is ROMless, firmware boots from external flash, enabling remote field updates of management images. For designs sustaining legacy networking hardware, the 208-FQFP footprint and 66 MHz speed remain familiar and well-characterized, though End-of-Life status mandates last-time-buy planning for field-service spares.
Recommended
Test and Measurement Instrumentation
Bench and rack instrumentation benefits from the MCF5307AI66B's balanced mix of processing power and integration: 70 MIPS of ColdFire V3 throughput handles instrument state machines, front-panel logic, and calibration math, while the multiply-accumulate module speeds filtering and averaging of sampled data. The parallel interface and 16 I/O lines interface to display drivers, keypads, and ADC/DAC control logic; I2C reaches temperature sensors and configuration EEPROM. The integrated DRAM controller supports the larger program and data memory that measurement firmware typically requires, and the watchdog timer guarantees recovery from firmware hangs during long unattended acquisition runs. Legacy instrument manufacturers maintaining ColdFire-based platforms continue to source this EOL device through remaining distributor stock, as the software and board ecosystem cannot be replicated without a full redesign.
Recommended
Legacy System Sustainment and Repair
The primary ongoing use of the MCF5307AI66B is sustaining and repairing systems designed in the 1990s and 2000s around the ColdFire architecture. Military, aerospace, medical, and industrial OEMs frequently freeze hardware designs after qualification; in these cases the 208-FQFP 28x28 mm footprint, pin map, and 66 MHz ColdFire V3 timing must be preserved exactly, making the original part the only valid repair component. Distributors and brokers such as Heisener (7,648 pieces in stock as of 2026-10-18) and ExcessChip supply remaining inventory, and Rochester Electronics offers licensed continued-manufacturing paths for EOL NXP processors. Procurement teams should verify date codes, purchase from traceable sources, and buy sufficient quantity to cover the product's remaining field-service life, since no pin-compatible successors exist.
Recommended
Motor Control and Automation Nodes
Distributed automation nodes, motor-drive supervisory controllers, and protocol gateways historically used the MCF5307AI66B for its combination of a 32-bit core, DMA-driven serial I/O, and external memory expansion. The DMA controller sustains UART communication with a fieldbus controller without core loading, the timers generate PWM-adjacent control signals or time-stamp encoder events, and the MAC module handles scaling and control-law arithmetic. The integrated watchdog enforces fail-safe shutdown in drive systems, and power-on reset guarantees defined startup of the external DRAM boot sequence. At 66 MHz the device delivers headroom for Modbus, PROFIBUS-style protocol stacks in ColdFire C code. Because NXP has ended production, new automation node designs should select actively supported ColdFire or ARM parts, reserving the MCF5307AI66B for existing-installation spares.
Recommended
Building Automation and Access Control
Panel controllers for building automation, HVAC supervisory units, and access-control boards adopted the MCF5307AI66B because its 70 MIPS core comfortably runs protocol stacks and scheduling logic while the I2C bus reads sensors and real-time clocks, and UARTs link to modems or RS-485 transceivers. The 4 KB SRAM buffers communication frames, and the external bus interface attaches the flash and DRAM needed for logging applications. The watchdog timer supports the continuous unattended operation these panels demand, and the industrial-grade AI suffix variant covers non-conditioned spaces such as mechanical rooms. As the part is End-of-Life, integrators repairing installed bases should source remaining stock now, while new panel designs should move to supported 32-bit MCUs; the 208-FQFP footprint has no cross-brand pin-compatible replacement in current production.
Recommended
Recommended Products Summary
Engineering reference data for MCF5307AI66B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF5307CAI66B |
|---|---|---|
| Package | 208-FQFP (28x28 mm) | 208-FQFP (28x28 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Core | ColdFire V3 | ColdFire V3 |
| Clock Speed | 66 MHz | 66 MHz |
| RAM Size | 4 KB SRAM | 4 KB SRAM |
| Program Memory | ROMless | ROMless |
| Temperature Grade | Industrial (A) | Commercial (C) |
| Lifecycle Status | End-of-Life / Not For New Designs | End-of-Life / Not For New Designs |
Key Differentiators
- Industrial temperature grade availability (vs MCF5307CAI66B)
- Integrated DRAM controller (vs MC68EC060RC50)
- Trade-off: End-of-Life status (vs MCF5307CAI66B)
Design Notes
The MCF5307AI66B is End-of-Life and Not For New Designs per the NXP product page. Any new schematic capture using this part creates immediate supply risk. For legacy designs, perform a last-time-buy analysis: Heisener listed 7,648 pieces in stock as of 2026-10-18 at approximately $36.49 per unit, but EOL stock is finite and pricing from brokers can rise sharply. Confirm date codes and request authenticity documentation when purchasing from independent distributors, as EOL processors are a frequent target for counterfeit parts.
Because the MCF5307 is ROMless, boot code must reside in external non-volatile memory, and the integrated DRAM controller must be correctly configured during reset initialization. Verify DRAM timing parameters (refresh rate, CAS latency, and bus turnaround) against the specific DRAM devices in your design using the MCF5307 Integrated Microprocessor User's Manual available from NXP. Incorrect DRAM initialization is the most common cause of boot failure on this family; use the manufacturer's reference initialization sequence as the starting point.
The 208-pin FQFP (28x28 mm, 0.5 mm pitch) requires careful PCB footprint accuracy; verify the land pattern against the mechanical drawing in the NXP user manual before fabrication. Keep the external bus interface (EBI/EMI) traces to DRAM and flash short and length-matched where practical to preserve signal integrity at 66 MHz bus operation. Provide solid ground return paths under the address/data buses and place decoupling capacitors at all supply pins of the package per standard high-pin-count QFP practice.
Compliance Information
Compliance data was not present in the provided web data. The NXP product page includes an Environmental Quality section, but its contents were not retrieved; verify RoHS/REACH status on the official NXP part page before procurement.
