MCF51AC128CVLKE - 32-bit ColdFire V1 MCU 128KB Flash | NXP
Référence : MCF51AC128CVLKE ⚠ Dernier achatMCF51AC128CVLKE Présentation
A 32-bit microcontroller (MCU) is an embedded computing device that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich peripheral set onto a single silicon die. The ColdFire V1 instruction set is a RISC-derived variable-length architecture positioned in NXP's vertical upgrade path that bridges 8-bit S08 designs and higher-end ColdFire V2/V3/V4 devices, letting OEMs port code across the Flexis family without rewriting firmware. Compared with 8-bit counterparts, the 32-bit core brings improved DSP arithmetic throughput, larger addressable memory, and more sophisticated interrupt controllers for deterministic real-time response.
Key features of the MCF51AC128CVLKE include ColdFire V1 V2 core, 50 MHz maximum bus clock, 128 KB on-chip Flash, multi-channel timers/PWM suited for three-phase motor commutation, up to 12-bit ADC, multiple serial interfaces (SCI, SPI, I2C) and on-chip voltage regulator with brown-out reset. The MCF51AC product line was designed for direct pin-for-pin compatibility with the corresponding 8-bit S08AC devices, simplifying migration between 8- and 32-bit designs on the same PCB. According to the manufacturer datasheet, the device includes an on-chip debug module supporting real-time background-debug mode (BDM) for in-circuit development.
Typical applications include industrial motor control (BLDC, PMSM and ACIM drives), appliance control boards, HVAC and pump controllers, sensor conditioning hubs, and low-end point-of-load industrial nodes. Engineering use cases leverage the integrated timers and ADC for closed-loop current sensing and field-oriented control (FOC) firmware.
When designing with this part, ensure that the host PCB provides both 5 V and 3.3 V rails if analog and digital sections are split, and respect the 50 MHz maximum bus clock when scaling oscillator settings. Be aware that NXP has begun end-of-life activity on certain MCF51AC256 variants; consult the latest NXP product change notice before locking the BOM for long-life production.
Cross-reference data unavailable in canonical distributor databases; substitute recommendations require manual verification against the target application's memory and peripheral requirements.
This page consolidates lifecycle status, package specifications, and same-family NXP pin-compatible alternatives not found in the manufacturer datasheet alone, supporting both new designs and legacy Flexis-series board refreshes.
Alternatives de remplacement direct pour MCF51AC128CVLKE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MCF51AC256ACLKE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCF51AC128CCLKE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCF51AC256BCLKER
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCF51CN128CLK
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCF51AG128VLK
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCF51AC128CVLKE Valeurs maximales et caractéristiques électriques
| Core Architecture | ColdFire V1 |
| Largeur du bus de données | 32 bit |
| Fréquence d'horloge maximale | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Package Type | 80-LQFP (14x14 mm) |
| Style de montage | Surface Mount |
| Series | MCF51AC (Flexis) |
| Program Memory Type | FLASH |
| Communication Interfaces | SCI, SPI, I2C |
| On-chip Debug | Background Debug Mode (BDM) |
| Pin Compatible With | S08AC 8-bit family (Flexis duo) |
Guide de configuration des broches du MCF51AC128CVLKE 80-lqfp (14x14 mm)
Configuration des broches du MCF51AC128CVLKE (boîtier 80-lqfp (14x14 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MCF51AC128CVLKE.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MCF51AC128CVLKE convient pour 6 applications: Brushless DC Motor Control, Home Appliance Control Boards, HVAC and Pump Controllers, Industrial Sensor Hubs, Point-of-Load Industrial Nodes, Smart Meter Edge Controllers.
Brushless DC Motor Control
The MCF51AC128CVLKE is well matched to three-phase brushless DC (BLDC) motor controllers because the ColdFire V1 core delivers deterministic interrupt response at 50 MHz while on-chip timers drive the complementary PWM channels for six-step or sinusoidal commutation. Its 128 KB Flash comfortably fits FOC firmware libraries and parameter tables for permanent-magnet synchronous motors. Place the MCU close to the gate-driver stage, route the ADC current-sense traces with Kelvin connections, and add a TVS diode across the bus for transient protection. Three-phase inverter sub-assemblies in industrial drives benefit from the integrated ADC sampling synchronised with PWM for field-oriented control.
Recommandé
Home Appliance Control Boards
White-goods appliance boards (washing machines, dishwashers, refrigerators) leverage the MCF51AC128CVLKE's 80-LQFP footprint and integrated peripherals for AC-line-fed motor control plus user-interface scanning. The 50 MHz ColdFire V1 core runs supervisory logic while dedicated timers generate the PWM for the drain pump or compressor inverter. Compared with 8-bit-only solutions, the 32-bit core simplifies firmware maintenance for variable-speed algorithms. Power-supply decoupling and a robust brown-out reset circuit are recommended, given the noisy AC-DC rails typical in this category.
Recommandé
HVAC and Pump Controllers
Variable-speed HVAC blowers and pump drives use the MCF51AC128CVLKE to execute sensorless or encoder-based speed loops driving a three-phase inverter through on-chip PWM and ADC. The 128 KB Flash houses the closed-loop firmware, while the integrated SCI and SPI interfaces connect to external temperature sensors and a host display. The ColdFire V1 50 MHz clock gives enough headroom for cascade control loops (current, speed, temperature). Pair the MCU with isolated gate drivers and place the analog ground pour around the current-sense pins to maintain ADC accuracy.
Recommandé
Industrial Sensor Hubs
Industrial sensor hubs aggregate data from analogue and digital transducers; the MCF51AC128CVLKE's on-chip ADC and serial bridges (SCI, SPI, I2C) make it a compact front-end to a higher-level PLC or gateway. The 32-bit data path and 128 KB Flash support lightweight DSP-style filtering routines, such as moving averages or Kalman-style pre-processing, that an 8-bit MCU would struggle with. Industrial EMC compliance requires the typical RF/ESD hardening - TVS arrays on external lines, common-mode chokes on serial buses, and a robust ground return path on the PCB.
Recommandé
Point-of-Load Industrial Nodes
Distributed industrial nodes (valve actuators, conveyor segments, packaging machines) often use the MCF51AC128CVLKE as a local controller that talks back to a central PLC over a serial or CAN-like link. The ColdFire V1 core's deterministic interrupt latency is essential for sequential logic in motion control, while 128 KB Flash holds safety routines and lookup tables. Adding a small external EEPROM or FRAM allows parameter storage that survives firmware reflash. Watch the supply-rail decoupling around the internal regulator pin.
Recommandé
Smart Meter Edge Controllers
Smart electricity, gas and water meters place the MCF51AC128CVLKE as the metering edge controller, where the ColdFire V1 core processes metrology algorithms and the serial ports drive the PLC or wireless M-Bus communication front-end. The LQFP-80 footprint gives generous pin access for the multiple sensor interfaces and tamper-detect inputs typical in metering hardware. Anti-tamper and EMC qualification depend on tight PCB stack-up, ground pours under the analog section, and external watchdog supervision beyond the internal COP.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCF51AC128CVLKE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCF51AC256ACLKE | MCF51AC128CCLKE | MCF51AC256BCLKER |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (14x14) | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same |
| Core | ColdFire V1 | ColdFire V1 | ColdFire V1 | ColdFire V1 |
| Max Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 128 KB | 256 KB | 128 KB | 256 KB |
| Data Bus Width | 32 bit | 32 bit | 32 bit | 32 bit |
| Pin-Compatible | Yes (Flexis duo with S08AC) | Yes | Yes | Yes |
| Lifecycle | Last Time Buy | Active (verify PCN) | Active (verify PCN) | Active (verify PCN) |
| Series | MCF51AC (Flexis) | MCF51AC (Flexis) | MCF51AC (Flexis) | MCF51AC (Flexis) |
Principaux différenciateurs
- Pin-compatible Flexis 32-bit drop-in (vs MC9S08AC60CFUE)
- Lower-cost 128 KB Flash tier (vs MCF51AC256ACLKE)
- Same silicon family as 32-bit ColdFire V1 (vs MCF51CN128CLK)
Notes de conception
The MCF51AC128CVLKE integrates an on-chip voltage regulator that requires external bulk decoupling on the VREG pin per the manufacturer datasheet. Place a 1 uF X7R ceramic and a 4.7 uF tantalum in parallel as close as possible to the regulator pin, and keep the analogue and digital ground returns stitched together at a single point near the MCU. Bulk decoupling on each VDDI/O pin prevents switching transients from corrupting the ADC result register on heavy PWM events.
Route ADC current-sense traces as a differential pair with Kelvin connection at the shunt resistor, and keep the trace length under 25 mm to minimise injection of switching noise. Maintain a solid ground pour beneath the analog section of the MCU; cut this pour back around the high-current power section to avoid creating large eddy-current loops. The 14x14 LQFP has a 0.5 mm pitch - follow NXP's land-pattern and paste-stencil recommendations to avoid solder bridging during reflow.
Estimated: at 50 MHz CPU clock the firmware loop budget is about 80 ns per instruction - keep critical motor-control interrupt service routines well under this budget. Watch for stack overflow in deeply nested interrupt priorities; configure the on-chip COP (computer-operating-properly) watchdog with a timeout shorter than the slowest expected firmware hang. Finally, secure factory production firmware via the internal Flash security byte because the BDM interface can otherwise allow unauthorised debug access.
Informations de conformité
Lifecycle is last-time-buy per NXP product page; consult the latest PCN for the final ship date and any compliance updates. RoHS, REACH, lead-free and halogen-free statuses were not in the verified data and are marked unknown pending the manufacturer's declaration of conformity.
