MC9S12C32MFAE25 - 16-bit HCS12 MCU 32KB Flash 25MHz | NXP
MPN: MC9S12C32MFAE25 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.21 | $8.21 |
| 10 | $7.8 | $78.00 |
| 100 | $7.25 | $725.00 |
| 500 | $6.8 | $3,400.00 |
| 1,000 | $6.4 | $6,400.00 |
MC9S12C32MFAE25 Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die. The HCS12 (S12) family is built around the CPU12 CISC core, a 16-bit architecture widely deployed in automotive body electronics and industrial control. MCUs sit at the top of the embedded hierarchy: semiconductor -> integrated circuit -> microcontroller unit -> application-specific embedded controller.
Key features include 32KB of flash program memory for code storage, an on-chip phase-locked loop (PLL) that allows flexible bus frequency synthesis up to 25 MHz, and an integrated bandgap-based voltage regulator (Vreg) that generates the internal VDD supply from a 2.97 V to 5.5 V external supply range. This wide supply range simplifies power design in 3.3 V and 5 V mixed systems.
The MC9S12C32MFAE25 carries an automotive temperature grade (-40C to +125C) and comes supplied in a tray pack. The LFQFP gull-wing package supports surface-mount assembly and provides 48 I/O-capable terminals for connecting on-chip peripherals such as timers, serial interfaces (SCI, SPI), and the 10-bit ADC reported by distributors.
Typical applications include automotive body and network nodes, industrial control panels, motor-adjacent monitoring logic, and general-purpose embedded systems where a 16-bit core and modest flash are sufficient.
Design consideration: since the part is NRND (Not Recommended for New Designs) per NXP, new designs should evaluate the recommended successors or pin-compatible S12 family members listed below.
This page adds distributor pricing, drop-in same-family alternatives, comparison tables, and design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC9S12C32MFAE25 — 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 MC9S12C32MFAE25 (same form factor and footprint) — differing in Core Architecture, Core Processor, Peripherals, Program Memory Size, Lifecycle Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12C32VFAE25
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S12GC32VFAE
✅ Drop-In✓ In Stock
$5.64 / Unit
View Datasheet →MC9S12C128VFAE
✅ Drop-In✓ In Stock
$9.75 / Unit
View Datasheet →MC9S12C32MPBE16
✅ Drop-In✓ In Stock
$4.93 / Unit
View Datasheet →MC9S12C32MFAE25 Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12 (CPU12) CISC |
| Core Size | 16-bit |
| Speed | 25 MHz |
| Flash Memory | 32KB (32K x 8) |
| Supply Voltage Range | 2.97 V to 5.5 V |
| On-chip Voltage Regulator | Bandgap-based Vreg |
| Clock Source | On-chip PLL |
| ADC Resolution | 10-bit |
| Operating Temperature | -40C to +125C (automotive grade) |
| Package | 48-LQFP (7x7 mm), LFQFP |
| Terminal Form | Gull Wing |
| Package Shape | Square |
| Mounting Type | Surface Mount |
| Pin Count | 48 |
| Family | S12C (48/52/80 pin flash-based MCU family) |
| Packaging | Tray |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
MC9S12C32MFAE25 square Pin Configuration Guide
Pin configuration for MC9S12C32MFAE25 (square 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 MC9S12C32MFAE25.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S12C32MFAE25 is suitable for 6 applications: Automotive Body Electronics, Industrial Control Panels, In-Vehicle Network Gateways (Low-Cost Nodes), Motor Control Supervision, Sensor Data Acquisition, Legacy System Maintenance and Service.
Automotive Body Electronics
The MC9S12C32MFAE25 is explicitly positioned by NXP for automotive network applications, and its -40C to +125C M temperature grade plus 2.97 V to 5.5 V supply tolerance make it a natural fit for body-control nodes such as window lift modules, lighting controllers, and mirror actuators. In these roles the 32KB flash holds the state-machine and CAN/serial handling code, the 10-bit ADC reads switch and sensor inputs, and the on-chip Vreg allows direct operation from the vehicle 5 V rail. The 25 MHz CPU12 bus gives ample headroom for low-cost real-time control. Because the part is NRND, new automotive programs should qualify MC9S12C128VFAE or GC-series equivalents, which reuse the same 48-LQFP footprint.
Recommended
Industrial Control Panels
In industrial control panels and machine sub-systems, the MC9S12C32MFAE25 combines a 16-bit HCS12 CISC core with 32KB flash and a 10-bit ADC, covering the needs of sequencer logic, operator interface scanning, and closed-loop monitoring without external memory. The on-chip bandgap regulator (Vreg) lets the MCU run from the panel's 3.3 V or 5 V logic rail directly, reducing BOM count, while the 25 MHz PLL-synthesized bus keeps scan loops deterministic. SCI and SPI peripherals handle RS-232 style links and external ADC/EEPROM communication. Designers must note the NRND status and verify the -40C to +125C grade against enclosure temperature, qualifying the pin-compatible C128 or GC32 variants for new builds.
Recommended
In-Vehicle Network Gateways (Low-Cost Nodes)
Low-cost network nodes in vehicles - seat controllers, sensor hubs, simple gateways - benefit from the S12C family heritage: Motorola/NXP designed the 48/52/80-pin flash MCUs specifically for cost- and space-sensitive network applications. The MC9S12C32MFAE25's 25 MHz bus and hardware PLL deliver sufficient processing for message buffering and filtering, while 32KB flash keeps firmware compact. The gull-wing LFQFP square package assembles reliably on standard automotive SMT lines. Given the NRND designation, designs here should migrate to same-footprint alternatives; the pinout-preserving MC9S12C128VFAE gives 4x code space for expanding protocol stacks without PCB respin.
Recommended
Motor Control Supervision
The MC9S12C32MFAE25 fits supervisory roles in motor-driven systems such as HVAC blowers, pumps, and small industrial drives, where the MCU monitors current via its 10-bit ADC, manages start/stop sequencing, and communicates status over serial links. Its 2.97 V to 5.5 V supply range tolerates noisy supply conditions on the power board when paired with local decoupling, and the -40C to +125C automotive grade covers under-hood and high-ambient cabinet installations. The 32KB flash accommodates PWM supervision and fault-handling firmware; the 25 MHz CPU12 core executes deterministic loop timing. Because the part is NRND, pair new designs with the same-package MC9S12C128VFAE for longevity.
Recommended
Sensor Data Acquisition
Distributed sensor nodes for pressure, temperature, and position measurement leverage the MC9S12C32MFAE25's integrated 10-bit ADC and low external-component count. The internal bandgap regulator and PLL allow a single-crystal clock and one supply rail, which simplifies compact sensor PCB design in the 7x7 mm 48-LQFP footprint. 32KB flash stores calibration tables and averaging filters, and the -40C to +125C grade supports harsh-environment deployments such as exhaust-adjacent sensing or industrial ovens. Serial outputs (SCI/SPI) forward processed readings to a host controller. Engineering teams replacing this NRND part should evaluate MC9S12GC32VFAE, which preserves the pin map while offering the general-purpose successor profile.
Recommended
Legacy System Maintenance and Service
A significant continuing use of the MC9S12C32MFAE25 is sustaining already-qualified products - vehicle modules, industrial units, and test equipment - whose firmware and toolchains are locked to the HCS12 S12C platform. Distributors including DigiKey ('ships today'), Mouser, and LCSC (in stock, from $8.2118 as of 2026-10-18) still supply the part, and Rochester Electronics offers extended-life sourcing through DigiKey Marketplace. For service stock, buying tray-packaged parts now is a low-risk hedge against eventual obsolescence. When supply tightens, the pin-compatible MC9S12C32VFAE25 and MC9S12GC32VFAE are the first substitution candidates, requiring only temperature-grade verification.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12C32MFAE25 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12C32VFAE25 | MC9S12GC32VFAE | MC9S12C128VFAE | MC9S12C32MPBE16 |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP - 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 |
| Flash Memory | 32KB (32K x 8) | 32KB | 32KB | 128KB | 32KB |
| Operating Temperature | -40C to +125C (automotive M grade) | -40C to +85C (V grade) | -40C to +85C (V grade) | -40C to +85C (V grade) | Commercial grade |
Key Differentiators
- Automotive M-grade temperature rating (vs MC9S12C32VFAE25)
- Lowest-cost entry to the S12C family at 25 MHz (vs MC9S12C128VFAE)
- 25 MHz bus speed in the same 48-LQFP footprint (vs MC9S12C32MPBE16)
Design Notes
The MC9S12C32MFAE25 integrates a bandgap-based voltage regulator that generates internal VDD from a 2.97 V to 5.5 V external supply, so a single 5 V rail can power the MCU without an external LDO. Follow the S12C reference manual's decoupling guidance: place ceramic bypass capacitors on VDD/VDDX pin pairs close to the package, and do not omit the Vreg stabilizing capacitor specified in the datasheet - omitting it is a common cause of PLL jitter and brown-out resets.
The part is NRND per NXP. Before committing to a new layout or a service stock build, verify long-term availability and qualify a pin-compatible successor (MC9S12C128VFAE or MC9S12GC32VFAE) on the same 48-LQFP footprint. Also confirm the temperature grade required by your application: the M-grade automotive rating (-40C to +125C) is what distinguishes this part from the otherwise near-identical V-grade variants - substituting a V-grade part in an under-hood or sealed enclosure design can exceed its +85C limit.
The on-chip PLL synthesizes the 25 MHz bus from a lower-frequency crystal. Route the oscillator and PLL filter traces short and away from fast-switching I/O, and use the PLL filter component values exactly as given in the S12C family datasheet rather than scaling them. For ADC accuracy on the 10-bit converter, keep analog inputs away from motor or switching-node coupling and provide a low-impedance source or buffer, since ADC acquisition windows on the S12C are short at 25 MHz bus rates.
Compliance Information
The 'AE' suffix in the part number typically indicates lead-free/RoHS-type qualification in NXP S12 nomenclature, but explicit RoHS/REACH statements were not present in the provided web data; confirm on the NXP product page's Environmental Quality section. Automotive temperature grade (-40C to +125C) confirmed from distributor data.
