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NXP Semiconductors MCF51AC128ACLKE
- Part No.:
- MCF51AC128ACLKE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
MCF51AC128ACLKE.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,097
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Product details
Overview
MCF51AC128ACLKE from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with CAN interface, 128 KB flash, 32 KB SRAM, and 80-pin LQFP package. It operates up to 50.33 MHz at 2.7–5.5 V, integrates dual analog comparators, 24-channel 12-bit ADC, two FTM modules, and supports LIN/SCI, I²C, SPI, and CRC acceleration - deployed in automotive body control modules requiring real-time CAN messaging and mixed-signal processing.
For engineers reviewing the MCF51AC128ACLKE datasheet, MCF51AC128ACLKE pinout, MCF51AC128ACLKE application, or MCF51AC128ACLKE equivalent, key selection criteria include CAN 2.0A/B compliance at up to 1 Mbps, 80-pin LQFP thermal performance (–40°C to +85°C), ColdFire V1 ISA_C instruction set compatibility, and on-chip BDM debug support for embedded firmware development.
Technical Context
The MCF51AC128ACLKE implements the ColdFire V1 core with background debug module (BDM), executing ISA_C instructions at up to 50.33 MHz. Its system integration includes multipurpose clock generator (MCG) with FLL/PLL, independent LPO for COP/RTI, and voltage regulator (VREG) for power management across operating modes.
It features two flexible timer modules (FTM1/FTM2) supporting edge- and center-aligned PWM, input capture, deadtime insertion, and hardware-triggered ADC conversions. The integrated MSCAN controller provides five receive buffers, three prioritized transmit buffers, programmable wakeup, and bus-off recovery - all compliant with ISO 11898-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ColdFire V1 32-bit RISC CPU, ISA_C instruction set, 0.76 DMIPS/MHz when executing from flash |
| Max Operating Frequency | 50.33 MHz - enables real-time control loop execution within sub-20 µs timing budgets |
| Flash / SRAM | 128 KB flash (read/program/erase over full voltage/temperature), 32 KB SRAM with security lock |
| ADC | 24-channel 12-bit SAR ADC with asynchronous clock option, auto-compare interrupt, and on-chip temperature sensor |
| CAN Interface | MSCAN module compliant with CAN 2.0A/B, programmable bit rate up to 1 Mbps, five RX buffers with FIFO |
| Package & Temp Range | 80-pin LQFP (14 mm × 14 mm), industrial temperature range: –40°C to +85°C |
| Debug Interface | Single-wire BDM with 6 hardware breakpoints and on-chip trace buffer for real-time program profiling |
Pinout & Package
Package: 80-pin LQFP (14 mm × 14 mm), RoHS-compliant, lead-free (Pb-free) per part number suffix 'E'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PTA0 / TxCAN | CAN Transmit Output | Dedicated CAN high-speed differential transmitter output; requires external CAN transceiver for bus connection |
| PTA1 / RxCAN | CAN Receive Input | Dedicated CAN receiver input; accepts differential signal from external transceiver; enabled only in CAN-enabled variants |
| BKGD / MS | Background Debug / Master Select | Single-wire BDM interface pin; used for programming, debugging, and reset control during development |
| RESET | Active-Low Reset Input | Asynchronous reset assertion resets CPU, peripherals, and registers; debounced internally for noise immunity |
| VDD / VSS | Power Supply / Ground | Multiple VDD/VSS pairs distributed across package for low-impedance power delivery and EMI reduction |
| PTF0–PTF7, PTE0–PTE7, etc. | Rapid GPIO / Peripheral Multiplex | 69 total GPIOs; 16 pins support RGPIO mode for CPU-clock-speed toggling, set/clear, and atomic bit manipulation |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Security | Flash block protection and SRAM lock prevent unauthorized read-out of firmware and sensitive data |
| Low-Power Operation | Three stop modes plus wait mode; peripheral clocks can be disabled individually to reduce active current below 1 mA |
| Hardware CRC Accelerator | Dedicated 16-bit CRC engine compliant with CRC16-CCITT (x¹⁶ + x¹² + x⁵ + 1); offloads CPU during firmware update or message integrity checks |
| Flexible Timer Synchronization | FTM register loads synchronized across channels; supports coordinated PWM generation and precise ADC triggering |
| Analog Comparator Options | ACMP1/ACMP2 support internal bandgap reference comparison and pin-visible output (ACMPxO) for external logic interfacing |
Applications
| Automotive Body Control Unit (BCU) | Industrial CAN Gateway |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and mirror adjustment via CAN network. IC Role / Device Role / Timing Role: Primary MCU managing real-time CAN message routing, analog sensor acquisition (e.g., ambient light, temperature), and PWM-driven motor control. Use Value: Integrated MSCAN, 24-channel ADC, and FTM-based motor drivers eliminate need for external CAN controllers and timing ICs - reducing BOM count by ≥3 components. | Use Scenario: Protocol translation between legacy RS-485 fieldbus and modern CAN networks in factory automation systems. IC Role / Device Role / Timing Role: Dual-SCI and MSCAN co-processor performing serial-to-CAN bridging with configurable baud rates and message filtering. Use Value: Hardware CRC and programmable CAN identifier filters enable deterministic, low-latency message forwarding with error detection - meeting IEC 61131-3 cycle time requirements. |
| Smart HVAC Controller | Medical Infusion Pump MCU |
Use Scenario: Closed-loop climate control using thermistor inputs, fan speed modulation, and valve actuation in commercial HVAC panels. IC Role / Device Role / Timing Role: Mixed-signal controller acquiring 12-bit temperature/humidity readings and generating precise 16-bit PWM outputs for brushless fan drivers. Use Value: Asynchronous ADC clocking and FTM deadtime insertion ensure low-noise analog measurements and glitch-free motor commutation - critical for EMI-sensitive environments. | Use Scenario: Safety-critical fluid delivery system requiring redundant monitoring, flow calibration, and alarm signaling. IC Role / Device Role / Timing Role: Fault-tolerant MCU executing COP watchdog, LVD voltage supervision, and dual ACMP-based occlusion detection with interrupt-driven response. Use Value: On-chip COP with independent LPO clock and low-voltage detect interrupt provide fail-safe behavior without external supervisors - satisfying IEC 62304 Class C software requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCF51AC256ACLKE | 256 KB flash, same 80-pin LQFP package, identical peripherals and clock architecture | Higher firmware capacity for OTA updates or complex protocol stacks (e.g., CAN FD gateway layer) | Select when future firmware growth or dual-application partitioning (e.g., bootloader + app) is required |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+ core, 128 KB flash, 16 KB RAM, 64-pin LQFP, no native CAN (requires external transceiver + software stack) | Limited peripheral integration: single 12-bit ADC (16 ch), no FTM, no hardware CRC, lower max frequency (40 MHz) | Choose for ARM ecosystem alignment and toolchain continuity where CAN bandwidth ≤500 kbps suffices |
Compared with MCF51AC256ACLKE, the higher-flash variant offers headroom for feature-rich firmware but shares identical timing, debug, and CAN performance; versus S9KEAZ128AMLH, MCF51AC128ACLKE delivers superior real-time determinism via ColdFire V1's fixed-cycle instruction execution and dedicated MSCAN hardware - critical for hard real-time CAN nodes.
Availability
MCF51AC128ACLKE is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, and medical infusion pump designs requiring stable component supply, long-term lifecycle support, and industrial-grade temperature operation.
Supply support for MCF51AC128ACLKE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors acquired Freescale in 2015 and maintains the ColdFire portfolio for legacy industrial and automotive applications requiring deterministic real-time performance and long product lifecycles.
The MCF51AC series belongs to NXP's legacy ColdFire microcontroller line, designed specifically for cost-sensitive, mixed-signal embedded systems needing CAN 2.0, robust debug, and seamless migration from 8-bit MCUs like the MC9S08AC128.
FAQ
What is the maximum operating frequency of the MCF51AC128ACLKE?
The MCF51AC128ACLKE operates at up to 50.33 MHz across its full voltage range (2.7 V to 5.5 V). This frequency is achievable using the internal MCG with FLL/PLL enabled and an external crystal (1–16 MHz) or ceramic resonator. Performance is validated per electrical characteristics in Table 16 of the Rev.7 datasheet, with timing margins maintained under worst-case temperature and voltage conditions.
Does the MCF51AC128ACLKE support CAN FD?
No, the MCF51AC128ACLKE implements only classical CAN 2.0A/B protocol via its MSCAN module. It does not support CAN FD features such as flexible data-rate, extended data length (up to 64 bytes), or CRC separation. Its CAN controller is limited to standard/extended frames with up to 8 bytes per message and bit rates up to 1 Mbps - confirmed in Section 1.3.1 and Table 19 of the datasheet.
How many analog comparator channels does the MCF51AC128ACLKE include?
The MCF51AC128ACLKE includes two analog comparators: ACMP1 and ACMP2. Both support rail-to-rail input operation, selectable interrupt edges, internal bandgap reference comparison, and pin-visible output (ACMP1O/ACMP2O). This is explicitly stated in Table 1 (Device Comparison) and Section 1.3.1 of the datasheet, and applies to all CAN-enabled MCF51AC128 variants including MCF51AC128ACLKE.
Is the MCF51AC128ACLKE pin-compatible with other members of the MCF51AC family?
Yes - the MCF51AC128ACLKE uses the same 80-pin LQFP package and pinout as MCF51AC256ACLKE, MCF51AC128AVLKE, and MCF51AC256AVLKE. Pin assignments are defined in Figure 2 and Table 4 of the datasheet. However, CAN-related pins (PTA0/TxCAN and PTA1/RxCAN) are functionally inactive in non-CAN variants (e.g., MCF51AC128Cxx), and RAM size differs (32 KB vs. 16 KB) between 'A' and 'C' suffix parts.
What debug interface does the MCF51AC128ACLKE use?
The MCF51AC128ACLKE uses a single-wire Background Debug Mode (BDM) interface via the BKGD/MS pin. It supports full-featured on-chip debugging including 6 hardware breakpoints (4 PC, 1 address pair, 1 data), real-time trace via VBUS, and on-chip trace buffer - all documented in Section 1.3.1 and Table 2 of the datasheet. No JTAG port is present.
MCF51AC128ACLKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-LQFP
- Series:
- MCF51AC
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- Coldfire V1
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, SCI, SPI
- Peripherals:
- LVD, PWM, WDT
- Number of I/O:
- 69
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 24x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCF51AC128ACLKE FAQ
1.How can I place an order for MCF51AC128ACLKE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCF51AC128ACLKE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCF51AC128ACLKE reliable?
The price and inventory of MCF51AC128ACLKE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCF51AC128ACLKE is usually 5 days.
3.What payment methods are accepted for MCF51AC128ACLKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCF51AC128ACLKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCF51AC128ACLKE?
MCF51AC128ACLKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCF51AC128ACLKE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCF51AC128ACLKE?
For technical support, including MCF51AC128ACLKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCF51AC128ACLKE requirements.
6.How does Aetrix verify that MCF51AC128ACLKE is sourced from the original manufacturer or authorized distributors?
All MCF51AC128ACLKE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCF51AC128ACLKE meets industry standards.
7.What is the process for return or replacement of MCF51AC128ACLKE?
All MCF51AC128ACLKE units undergo pre-shipment inspection (PSI). If there is an issue with MCF51AC128ACLKE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCF51AC128ACLKE part is unused and in its original packaging.
Return procedure for MCF51AC128ACLKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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