MC9S12A64CPVE - 16-bit HCS12 MCU 64KB Flash 25MHz | NXP
MPN: MC9S12A64CPVE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $37.85 | $37.85 |
| 10 | $36.5 | $365.00 |
| 100 | $35.2 | $3,520.00 |
| 500 | $33.9 | $16,950.00 |
| 1,000 | $32.6 | $32,600.00 |
MC9S12A64CPVE Overview
A 16-bit microcontroller (MCU) is a complete computing system on a single chip that combines a processor core, program memory, data memory, and peripheral functions such as timers, serial interfaces, and analog-to-digital converters. Within the MCU hierarchy, the HCS12 family sits in the broader 16-bit embedded controller category, descending from the Freescale (Motorola) HC12 and 68HC11 lineage that has served industrial and automotive platforms for decades. NXP, which acquired Freescale Semiconductor, continues to supply this family for legacy designs.
Key features of the MC9S12A64CPVE include the HCS12 CPU core with CISC instruction set, 64KB (64K x 8) of Flash program memory, and a maximum bus frequency of 25 MHz. The system integration module handles resource mapping, clock generation, interrupt control, and bus interfacing. An external bus narrow mode allows the 16-bit bus to operate in 8-bit mode, enabling interfacing with single 8-bit-wide external memory devices.
The architecture provides a 2.5V/5V supply environment per cross-reference data, with the core and I/O engineered around the classic 5V-tolerant HCS12 electrical profile that made the family popular in noisy automotive and industrial environments where 5V signaling remains standard. Peripherals typically found across the S12A family include SCI serial ports, SPI, an ATD analog-to-digital converter, timer channels, and PWM outputs, all controlled through memory-mapped registers.
Typical applications include automotive body electronics, industrial control systems, motor control nodes, instrumentation, and legacy product lines requiring continued sourcing of proven HCS12 silicon. The 112-pin LQFP offers generous I/O count for relays, sensors, and communication expansion.
Design consideration: this part is classified NRND (Not Recommended for New Designs) by NXP, so new designs should evaluate S12G, S12Z, or MagniV successors, while existing designs can continue to source this part for maintenance.
This page synthesizes distributor pricing, drop-in alternatives within the S12 family, and practical design notes not found in the manufacturer datasheet, with pricing data as of 2026-10-18.
Drop-in alternatives for MC9S12A64CPVE — 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 MC9S12A64CPVE (same form factor and footprint) — differing in Package, ADC, Core Architecture, Program Memory Size, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12A64CPV
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12A128CPVE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12B64CPVE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12D64CPVE
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →MC9S12D64MPVE
✅ Drop-In✓ In Stock
$9.84 / Unit
View Datasheet →MC9S12A64CPVE Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12 |
| Core Size | 16-Bit |
| Architecture | CISC |
| Maximum Clock Frequency | 25 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 64KB (64K x 8) |
| Supply Voltage | 2.5V/5V |
| Package | 112-LQFP (20x20 mm) |
| Pin Count | 112 |
| Mounting Type | Surface Mount |
| External Bus | 8-bit narrow mode supported |
| System Module | SIM (System Integration Module) |
| RoHS Status | Compliant |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
MC9S12A64CPVE 112-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for MC9S12A64CPVE (112-lqfp (20x20 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 MC9S12A64CPVE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S12A64CPVE is suitable for 6 applications: Automotive Body Electronics, Industrial Control and Automation, Motor Control Nodes, Instrumentation and Test Equipment, Legacy Product Line Maintenance, Building Automation and Access Control.
Automotive Body Electronics
The MC9S12A64CPVE fits automotive body-control nodes such as door modules, seat controllers, and lighting units because the HCS12 architecture combines 5V-tolerant I/O with the deterministic 16-bit core these designs were originally qualified around. With 64KB of Flash and up to 25 MHz bus speed, it comfortably runs relay sequencing, LIN-style polling loops, and diagnostic routines. The 112-LQFP provides enough GPIO for multiple switches, lamps, and motor drivers without port expanders. In existing platforms, re-sourcing this NRND part keeps the validated firmware base unchanged; new designs should target S12G/MagniV successors with integrated LIN/CAN physical layers.
Recommended
Industrial Control and Automation
In PLC I/O modules, sensor hubs, and machine controllers, the MC9S12A64CPVE offers a robust 5V signaling environment and the HCS12's bit-manipulation instruction set, which simplifies direct register control of relays, valves, and steppers. The 64KB Flash accommodates state machines and Modbus-type serial protocols over SCI; the 25 MHz bus keeps interrupt latency predictable. The SIM-based clock system tolerates the noisy electrical environment of factory floors, and the 112-LQFP exposes ample port pins for parallel I/O expansion. Designers maintaining legacy industrial equipment benefit from pin-compatible family alternatives if 64KB becomes a firmware ceiling.
Recommended
Motor Control Nodes
The MC9S12A64CPVE serves DC and small BLDC motor control in applications like pumps, fans, and actuators. The HCS12 timer/PWM resources generate the drive waveforms while the 16-bit core closes speed and current loops at 25 MHz. The 5V I/O directly interfaces gate drivers and Hall sensors without level shifting, improving noise immunity over 3.3V MCUs. With 64KB Flash, field-oriented or trapezoidal commutation firmware plus a communication stack fits comfortably. Because S12A peripherals are the reduced set, verify ADC channel count against the datasheet; the S12D64 alternative in the same footprint adds peripheral options when more sensing channels are required.
Recommended
Instrumentation and Test Equipment
Bench instruments, meters, and data loggers use the MC9S12A64CPVE as a system controller driving front-panel keys, displays, and serial links. The CISC HCS12 core handles BCD/ASCII conversions and menu logic efficiently, while 64KB Flash stores calibration tables and firmware. The 112-LQFP's abundant I/O connects directly to LCD modules, keypad matrices, and printer ports at 5V logic levels. Predictable 25 MHz interrupt behavior suits timekeeping and sample scheduling. For higher-precision measurement front ends, pair the MCU with external ADCs from the MAX or TLC families over SPI, keeping the analog domain separate from the 5V digital controller.
Recommended
Legacy Product Line Maintenance
The primary ongoing use case for the MC9S12A64CPVE is sustaining production of designs first qualified on Freescale silicon. Since the part is NRND but still orderable through distributors as of 2026-10-18, procurement teams should perform a stock audit and place last-time-buy quantities matching the remaining product lifetime. The pin-compatible S12 family alternatives (A128, B64, D64 variants in 112-LQFP) provide a migration ladder if raw supply tightens, preserving PCB footprints and much of the toolchain. Firmware revalidation is minimal within the same S12A family and moderate when moving to S12B/S12D due to peripheral electrical differences.
Recommended
Building Automation and Access Control
Door controllers, HVAC zone boards, and lighting schedulers benefit from the MC9S12A64CPVE's combination of 5V I/O density and serial connectivity. The HCS12 SCI ports link to RS-485 transceivers for multi-drop building networks, while timers schedule relay actions and PWM dims lighting loads. The 64KB Flash holds protocol stacks, schedules, and event logs in external EEPROM-backed storage. The 25 MHz bus handles polling of dozens of addressable nodes without dropped interrupts. Its NRND status makes it best suited to service replacements of installed bases; retrofit projects should evaluate S12G parts that integrate LIN physical interfaces for lower system cost.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12A64CPVE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12A64CPV | MC9S12A128CPVE | MC9S12B64CPVE | MC9S12D64CPVE | MC9S12D64MPVE |
|---|---|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC |
| Max Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Flash Memory | 64KB (64K x 8) | 64KB | 128KB | 64KB | 64KB | 64KB |
| Peripheral Family | S12A (baseline) | S12A (baseline) | S12A (baseline) | S12B (adds CAN) | S12D (richer set incl. CAN) | S12D (richer set incl. CAN) |
Key Differentiators
- Largest Flash in the pin-compatible S12A sub-family (vs MC9S12A64CPVE (this part) vs MC9S12A64CPV)
- Baseline S12A simplicity for cost-sensitive legacy boards (vs MC9S12D64CPVE)
- Non-CAN baseline where CAN is not required (vs MC9S12B64CPVE)
Design Notes
The MC9S12A64CPVE is NRND per NXP's product page. Do not start new designs with this part: place a last-time-buy sized to your remaining product lifetime, and pre-qualify a pin-compatible S12 family successor (A128, B64, or D64 in the same 112-LQFP). Note that S12B/S12D parts differ in peripheral electrical characteristics per FindIC's comparison data, so re-run I/O and timing validation before qualifying a substitute.
The S12 family operates in a 5V I/O environment (2.5V/5V supply per cross-reference data). Decouple each VDD/VDDA/VDDX pin pair with 100 nF ceramics placed within 2 mm of the pins, plus bulk 10 uF near the regulator. Keep VDDA on a filtered supply or ferrite-isolated rail, since ATD accuracy on HCS12 parts is sensitive to digital noise on the analog supply. Observe power sequencing guidance in the manufacturer datasheet when the external bus is used.
The 112-LQFP 20x20 mm footprint requires a solder-mask-defined land pattern per the JEDEC LQFP outline referenced in the manufacturer datasheet. For the external bus in 8-bit narrow mode, keep address/data traces under 10 cm and add series termination (22-33 ohm) on bus lines to control ringing at 25 MHz bus rates. Expose adequate thermal relief via ground vias to the internal plane; the LQFP thermal pad is the package perimeter only, so copper flooding under the body aids heat spreading.
Compliance Information
RoHS compliant per DigiKey/digchip product data. NXP product page lists environmental quality documentation; detailed REACH/halogen status not included in provided data.
