MC9S12C64MFAE - 16-bit HCS12 MCU, 64KB Flash, 25MHz | NXP
MPN: MC9S12C64MFAE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.9 | $8.90 |
| 10 | $8.01 | $80.10 |
| 100 | $7.12 | $712.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.7 | $5,700.00 |
MC9S12C64MFAE Overview
A microcontroller is a single-chip computer that combines a processor core, program memory, data RAM, and peripherals on one die. Within the semiconductor hierarchy, the MC9S12C64MFAE sits at the 16-bit MCU level, part of NXP's (formerly Freescale/Motorola) HCS12 family, which evolved from the industry-standard 68HC11 architecture. The S12C sub-family targets cost- and space-sensitive general-purpose industrial and automotive networked applications.
Key differentiating features include the on-chip bandgap-based voltage regulator (Vreg) that generates the internal digital supply (VDD) from a wide external supply range of approximately 2.97V to 5.5V, a PLL circuit that lets the CPU run faster than the external crystal frequency, and 31 GPIO lines. These traits simplify board design and reduce external component count.
Technically, the CPU12 CISC core executes efficient 16-bit code with rich addressing modes, while the Flash memory supports in-system reprogramming for field updates. The 4K x 8 of on-chip RAM (per datasheet listings) supports buffers for the CAN and SCI stacks. The integrated MSCAN module and standard SCI/SPI serial interfaces make networked node design straightforward.
Typical applications include automotive body and network modules (CAN nodes), industrial control panels, motor control boards, and general-purpose embedded controllers where a 16-bit core with Flash and CAN is required.
Design consideration: confirm the operating supply range against the specific datasheet revision, as distributor listings show both 2.5V-class and 5V-class references; the on-chip Vreg typically supports the 2.97V to 5.5V external range.
This page synthesizes distributor pricing, drop-in S12-family alternatives, and practical design notes not found in the manufacturer datasheet, as of 2026-10-18.
Drop-in alternatives for MC9S12C64MFAE — 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 MC9S12C64MFAE (same form factor and footprint) — differing in Core Architecture, ADC, Operating Temperature, Program Memory Size, On-chip Voltage Regulator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12C128MFAE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.38 / Unit
View Datasheet →MC9S12GC64MFAE
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$10.1 / Unit
View Datasheet →MC9S12C32MFAE16
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.2 / Unit
View Datasheet →MC9S12C128VFAE
✅ Drop-In✓ In Stock
$9.75 / Unit
View Datasheet →MC9S12GC32VFAE
✅ Drop-In✓ In Stock
$5.64 / Unit
View Datasheet →MC9S12GC96MFUE
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →MC9S12C64MFAE Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12 (CPU12 CISC) |
| Core Size | 16-bit |
| Maximum Clock Speed | 25 MHz |
| Program Memory Size | 64KB (64K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 4K x 8 |
| EEPROM Size | N/A (not listed) |
| Connectivity | CANbus, EBI/EMI, SCI, SPI |
| Peripherals | POR, PWM, WDT |
| Number of I/O | 31 |
| Supply Voltage Range | 2.35 V to 5.5 V (per listings; Vreg supports 2.97 V to 5.5 V external) |
| Package Type | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Series | HCS12 / S12C Family |
| On-chip Voltage Regulator | Yes (bandgap-based Vreg, generates internal VDD) |
| PLL | Yes (on-chip phase-lock loop) |
| Packaging | Tray |
| Lifecycle Status | NRND (Not Recommended for New Designs) per NXP product page |
MC9S12C64MFAE 48-lqfp (7x7 mm) Pin Configuration Guide
Pin configuration for MC9S12C64MFAE (48-lqfp (7x7 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 MC9S12C64MFAE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S12C64MFAE is suitable for 6 applications: Automotive CAN Network Nodes, Industrial Control Panels, Motor Control and PWM Actuator Drive, Embedded Instrumentation and Data Loggers, Building Automation and HVAC Controllers, General-Purpose Embedded Controllers.
Automotive CAN Network Nodes
The MC9S12C64MFAE fits automotive body and network modules because it integrates a CAN controller alongside the 16-bit HCS12 core running at 25MHz with 64KB of in-system-programmable Flash. Typical roles include door modules, seat controllers, and lighting nodes that exchange frames on a vehicle CAN bus. The on-chip bandgap voltage regulator accepts the vehicle 5V rail across a 2.97V to 5.5V range, reducing external component count, while the PLL permits a low-cost crystal to clock the 25MHz core. The 4KB RAM provides message buffers and signal storage for CAN stacks. Because the part is NRND, it suits service, repair, and legacy line延续 designs rather than brand-new vehicle programs.
Recommended
Industrial Control Panels
In industrial control panels, the MC9S12C64MFAE serves as a compact 16-bit controller combining 31 GPIO lines, PWM outputs for actuator and heater drive, and SCI/SPI links to HMI or instrumentation. The 25MHz CPU12 core handles PID loops and sequencer logic comfortably, while the watchdog timer (WDT) and power-on reset (POR) improve system robustness in electrically noisy factory environments. The 64KB Flash supports in-field firmware updates over SCI, minimizing downtime. Its 7x7mm LQFP-48 footprint conserves PCB area in DIN-rail-mounted boards. Engineers should apply proper decoupling and EMI layout practices around the CAN and SPI lines, per NXP S12C hardware design guidance.
Recommended
Motor Control and PWM Actuator Drive
The MC9S12C64MFAE's dedicated PWM peripheral makes it a practical choice for DC motor and actuator control in cost-sensitive equipment. The 25MHz HCS12 core executes control algorithms with 16-bit arithmetic, while PWM channels drive H-bridges or MOSFET gates at audible-safe carrier frequencies. The 4KB RAM supports control state variables and telemetry buffering, and SPI connects digital current or position sensors. Because the on-chip voltage regulator accepts a 2.97V to 5.5V supply, the MCU can share a single 5V rail with gate drivers. Designers should estimate MOSFET switching losses and verify SOA of the external power stage, since the MCU itself only generates the PWM signal.
Recommended
Embedded Instrumentation and Data Loggers
For embedded instrumentation, the MC9S12C64MFAE offers the EBI/EMI external bus, enabling memory-mapped expansion such as external SRAM or parallel-interface displays beyond the internal 4KB RAM. SCI ports stream measurement data to PCs or modems, and SPI interfaces ADCs and real-time clocks. The 64KB Flash stores calibration tables and logging firmware, and the 25MHz core provides adequate throughput for filtering and scaling of sampled channels. The integrated POR and WDT sustain long unattended operation. Because Flash is in-system programmable, calibration routines and feature updates can be deployed in the field without socketed parts, reducing maintenance cost in installed instrument fleets.
Recommended
Building Automation and HVAC Controllers
Building automation nodes benefit from the MC9S12C64MFAE's blend of CAN/SCI networking, PWM-driven damper and valve control, and 31 GPIOs for sensor polling. The 25MHz CPU12 core runs protocol stacks and control loops, while the 64KB Flash accommodates firmware plus configuration tables in nonvolatile storage. The integrated regulator and PLL minimize bill-of-materials cost, important in high-volume thermostat and zone-controller products. Its 7x7mm LQFP-48 package suits compact PCBs inside wall thermostats and actuator housings. NRND status means new HVAC platforms should begin on supported NXP parts, but the C64 remains appropriate for servicing installed bases and running out existing inventory.
Recommended
General-Purpose Embedded Controllers
As a general-purpose embedded controller, the MC9S12C64MFAE delivers a balanced feature set: a 16-bit 25MHz HCS12 core, 64KB Flash, 4KB RAM, CAN/SCI/SPI connectivity, and PWM with watchdog supervision. It suits vending machines, access-control readers, battery chargers, and small appliances where a modest but robust MCU is required. The CISC CPU12 architecture, descended from the 68HC11, shortens the learning curve for teams with legacy HC11 code. Development toolchains for S12 devices (CodeWarrior-class IDEs and BDM/ancillary debug interfaces) remain available. Designers should confirm current availability given the NRND status and consider pin-compatible S12G parts for new projects.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12C64MFAE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12C128MFAE | MC9S12GC64MFAE | MC9S12C32MFAE16 | MC9S12C128VFAE |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | HCS12 (CPU12), 16-bit CISC | HCS12, 16-bit CISC | HCS12, 16-bit CISC | HCS12, 16-bit CISC | HCS12, 16-bit CISC |
| Program Memory (Flash) | 64KB (64K x 8) | 128KB | 64KB | 32KB | 128KB |
| Connectivity | CAN, EBI/EMI, SCI, SPI | CAN, EBI/EMI, SCI, SPI | CAN, SCI, SPI (per G-series) | CAN, SCI, SPI | CAN, EBI/EMI, SCI, SPI |
Key Differentiators
- Balanced 64KB Flash at 25MHz (vs MC9S12C32MFAE16)
- Cost-optimized memory for legacy builds (vs MC9S12C128MFAE)
- Proven C-series heritage vs G-series update (vs MC9S12GC64MFAE)
Design Notes
Power the MC9S12C64MFAE from a single external rail; the NXP product description states the on-chip bandgap-based voltage regulator (Vreg) generates the internal VDD from a 2.97V to 5.5V external supply. Distributor archives list internal-domain figures near 2.5V, which refers to the regulated core, not the pin supply. Place 0.1uF ceramic decoupling capacitors on each VDD pin pair and follow the S12C hardware design guide for VDDRX/PLL filter capacitor values, as the internal regulator requires specific external filter capacitance for stability.
The PLL demands careful layout: NXP S12C hardware guidance specifies an external RC filter network on the PLL filter pin, and this network should be placed close to the device with a quiet analog ground return to minimize clock jitter. Route the CAN transceiver (e.g., an NXP TJA or MC3390x class transceiver) with a controlled-length twisted pair stub and place the crystal within a few millimeters of the EXTAL/XTAL pins with guard ground. Keep the EBI/EMI bus traces matched if external memory is used, as the 25MHz bus tolerates limited skew.
Because the part is NRND, lock in an approved alternative (MC9S12C128MFAE or MC9S12GC64MFAE, both same LQFP-48 footprint) before new layout freezes. Also verify the exact ordering-code suffixes: NXP S12C speed and temperature grades are encoded in the part number (e.g., MFAE vs VFAE vs CFAE), and a mismatch in speed grade can cause marginal timing on the 25MHz bus. Confirm Flash erase/program voltages for in-system programming if field updates are planned - some S12C variants require charge-pump enable sequences documented in the family reference manual.
Compliance Information
The AE suffix in NXP part numbering traditionally denotes lead-free/RoHS-compliant packaging, but RoHS/REACH status was not explicitly stated in the provided web data. Verify on the official NXP product page (nxp.com/part/MC9S12C64MFAE) under Environmental Quality.