NXP Semiconductors MCF51AC128CVLKE

Overview

MCF51AC128CVLKE from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller designed for automotive and industrial control applications requiring CAN-free deterministic real-time processing. It features a 50.33 MHz core, 128 KB flash, 16 KB SRAM, 24-channel 12-bit ADC, dual FTM modules, and 69 GPIOs in an 80-pin LQFP package.

For engineers reviewing the MCF51AC128CVLKE datasheet, MCF51AC128CVLKE pinout, MCF51AC128CVLKE application, or MCF51AC128CVLKE equivalent, key selection considerations include its CAN-disabled configuration, 80-pin LQFP mechanical footprint, 16 KB RAM allocation, −40°C to +105°C operating range, and compatibility with ColdFire V1 toolchains and BDM debugging.

Technical Context

The MCF51AC128CVLKE implements the ColdFire V1 core with ISA_C instruction set, delivering 0.76 DMIPS/MHz when executing from flash. Its system integration includes a multipurpose clock generator (MCG) supporting FLL/PLL operation with external crystal (1–16 MHz) or internal reference, plus low-power oscillator (LPO) for COP and RTI.

Peripheral integration centers on deterministic timing: two flexible timer modules (FTM1/FTM2) support synchronized PWM generation, deadtime insertion, and hardware-triggered ADC conversions; the 24-channel 12-bit ADC operates with asynchronous clocking for noise reduction and includes automatic compare interrupts and on-chip temperature sensing.

Key Specifications

Pinout & Package

Package: 80-pin LQFP, 14 mm × 14 mm, 0.5 mm pitch, exposed pad (thermal pad not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MCF51AC128AVLKE, the MCF51AC128CVLKE removes CAN hardware to reduce die size and cost while retaining identical ADC, FTM, and RGPIO capabilities; versus K22FN512VLH12, it offers lower power consumption at equivalent real-time tasks but lacks CAN FD and modern peripheral sets.

Availability

MCF51AC128CVLKE is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and smart sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCF51AC128CVLKE 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation through its acquisition of Freescale.

The MCF51AC128CVLKE belongs to the ColdFire® microcontroller family, designed specifically for deterministic real-time control in cost-sensitive, thermally demanding applications where CAN is unnecessary but high-integration analog and timer peripherals are essential.

FAQ

What is the maximum operating frequency of the MCF51AC128CVLKE?

The MCF51AC128CVLKE operates at a maximum core frequency of 50.33 MHz across its full supply voltage range (2.7 V to 5.5 V). This speed is achievable in both FEI (internal FLL) and FBE (external crystal) modes, with timing validated per Table 16 (MCG Frequency Specifications) and Table 17 (Control Timing) in the Rev.7 datasheet. The MCF51AC128CVLKE delivers consistent 50.33 MHz operation under −40°C to +105°C ambient conditions.

Does the MCF51AC128CVLKE support CAN communication?

No, the MCF51AC128CVLKE does not support CAN communication. The "C" in the part number suffix denotes CAN-disabled configuration, confirmed in Table 1 (Device Comparison) and Table 3 (Orderable Part Number Summary) of the Rev.7 datasheet. Pins PTA0 (TxCAN) and PTA1 (RxCAN) are physically present but functionally disabled; they may be used as general-purpose I/O. For CAN-enabled variants, select MCF51AC128AVLKE.

What is the SRAM capacity of the MCF51AC128CVLKE?

The MCF51AC128CVLKE integrates 16 KB of on-chip static RAM (SRAM), as specified in Table 1 (Device Comparison) and Section 1.3.1 (Feature List) of the Rev.7 datasheet. This SRAM is used for stack, heap, and global variable storage, and is accessible at full CPU clock speed without wait states. Note that CAN-enabled variants (e.g., MCF51AC128AVLKE) include 32 KB SRAM, but the C-suffix version is fixed at 16 KB.

Which package type and dimensions does the MCF51AC128CVLKE use?

The MCF51AC128CVLKE uses an 80-pin LQFP package measuring 14 mm × 14 mm with 0.5 mm lead pitch, as documented in Figure 2 (80-Pin LQFP) and Table 22 (Package Information) of the Rev.7 datasheet. The package includes an exposed thermal pad (non-electrical), and pin assignments match the MCF51AC256 series 80-pin variant, with CAN-related pins repurposed as GPIO in this CAN-disabled model.

How many ADC channels does the MCF51AC128CVLKE support?

The MCF51AC128CVLKE supports 24 single-ended analog input channels for its 12-bit successive-approximation ADC, as confirmed in Table 1 (Device Comparison) and Section 1.3.1. These channels are distributed across Ports A, B, D, G, and H (e.g., AD1P0–AD1P23), enabling simultaneous sampling of multiple sensors. The ADC supports 12-/10-/8-bit right-justified output formats and hardware-triggered conversions via FTM modules.