NXP Semiconductors MCF51AC

MCF51AC variants from NXP Semiconductors

MCF51AC Datasheet

Variants

Mfr

NXP Semiconductors

Lifecycle

Active

MCF51AC Overview

What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
2 distinct suffix patternsExamples: 256ACLKE, 256ACPUE. Decode suffix meaning in the ordering notes under the variant table.

Target Applications

Microcontrollers — design-in and field replacement
BOM scrub where only the base prefix is known but suffix is TBD
Second-source checks when the original MPN is constrained

Ordering Variants

Compare 2 MCF51AC part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part Number	Description	Manufacturer	Lifecycle	RoHS	Availability	Action
MCF51AC256ACLKE	IC MCU 32BIT 256KB FLASH 80LQFP	NXP Semiconductors	Active	Compliant	In Stock	RFQ
MCF51AC256ACPUE	IC MCU 32BIT 256KB FLASH 64LQFP	NXP Semiconductors	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on MCF51AC map to package, grade, and reel options.

How to Choose the Right MCF51AC Microcontrollers

📦

Match the footprint first

Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.

⚡

Electrical headroom

Compare voltage and current columns in the variant table. For MCF51AC, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.

🌡️

Temp grade letter matters

Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.

🔢

Copy the full MPN

Do not BOM only "MCF51AC" — include the full suffix (e.g. 256ACLKE, 256ACPUE). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for MCF51AC product family

Identity

Base Model

MCF51AC

Manufacturer

NXP Semiconductors

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source MCF51AC with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from NXP Semiconductors. Our team supports active, EOL, and hard-to-find component sourcing.

Original manufacturer parts with traceability options
BOM upload and multi-line RFQ support
Package, grade, and compliance verification

Request Quote View NXP Semiconductors Browse all base models →

Frequently Asked Questions

Common technical questions about the MCF51AC product family.

Is MCF51AC a single part I can order, or a family prefix?

MCF51AC is a base / family code from NXP Semiconductors. You order a full MPN such as MCF51AC256ACLKE, MCF51AC256ACPUE. The variant table lists 2 orderable lines with different suffixes.

What do the suffix letters on MCF51AC part numbers mean?

Listed suffix fragments include: 256ACLKE, 256ACPUE. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the NXP Semiconductors datasheet ordering guide — do not guess from pattern alone.

What is the lifecycle status of MCF51AC variants?

Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.

What should I send for an RFQ on MCF51AC?

Full manufacturer MPN (not just MCF51AC), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.

Where is the MCF51AC datasheet?

Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.