S9S12XS64J1MAE - 16-bit MCU, 64KB Flash, 40MHz, S12X | NXP
MPN: S9S12XS64J1MAE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.74 | $87.40 |
| 100 | $7.62 | $762.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $6.2 | $6,200.00 |
S9S12XS64J1MAE Overview
What is an HCS12X microcontroller? The HCS12X is a 16-bit CISC microcontroller core from NXP, evolving from the original HC12 architecture. It belongs to the broader 16-bit MCU category, sitting between 8-bit MCUs and 32-bit ARM Cortex-M devices in the embedded computing hierarchy. S12X parts typically target cost-sensitive automotive body electronics, offering on-chip peripherals (CAN, PWM, timers) and Flash memory for firmware storage.
Key features of the S9S12XS64J1MAE include 64KB (64K x 8) of Flash program memory, 4KB of RAM, an integrated LVD/POR/PWM/WDT peripheral set, and 44 general-purpose I/O pins. The 40MHz bus speed delivers sufficient throughput for body-control, sensor-fusion, and LIN/CAN slave-node applications while keeping active power modest.
The S9S12XS64J1MAE uses the HCS12X CISC core with enhanced XGATE co-processor support in the wider S12XS family, allowing deterministic peripheral handling. The 5V-tolerant I/O and automotive qualification make it well-suited to operate alongside analog drivers in mixed-signal body modules without external level shifters.
Typical applications include automotive body control modules, instrument clusters, HVAC panels, lighting controllers, door/window/seat modules, and CAN/LIN slave nodes. The combination of CAN+SCI+SPI connectivity and PWM-driven timers suits motor-control and LED-driver subsystems in vehicles.
When designing with this MCU, ensure a robust 5V supply decoupling network and review the NXP S12XS reference manual for port-mux and interrupt-vector assignments. The 64KB Flash budget requires disciplined code-section placement for applications approaching the memory ceiling.
Drop-in alternatives for S9S12XS64J1MAE — 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 S9S12XS64J1MAE (same form factor and footprint) — differing in Mounting Type, Package, RoHS Status, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S12XS64J1MAL
✅ Drop-In✓ In Stock
$9.1 / Unit
View Datasheet →MC9S12XS64CAE
✅ Drop-In📋 Reference alternative (not in catalog)
S912XEQ512J2MAL
✅ Drop-In✓ In Stock
$17.95 / Unit
View Datasheet →S9S12HY32J0VLL
✅ Drop-In✓ In Stock
$5.48 / Unit
View Datasheet →MC9S12DT256VPVE
✅ Drop-In✓ In Stock
$25.87 / Unit
View Datasheet →S9S12XS64J1MAE Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X |
| Core Size | 16-Bit |
| Program Memory Size | 64KB (64K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 4KB |
| CPU Speed | 40 MHz |
| Connectivity | CANbus, SCI, SPI |
| Number of I/O | 44 |
| Peripherals | LVD, POR, PWM, WDT |
| Operating Temperature | -40C to +125C (Automotive) |
| Supply Voltage | 5 V (typical, per datasheet family) |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Series | HCS12X / S12XS |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified (automotive grade) |
S9S12XS64J1MAE Pin Configuration
| Pin 1 | PP0/KWP0 — GPIO / PWM channel 0 |
| Pin 2 | PP1/KWP1 — GPIO / PWM channel 1 |
| Pin 3 | PP2/KWP2 — GPIO / PWM channel 2 |
| Pin 4 | PP3/KWP3 — GPIO / PWM channel 3 |
| Pin 5 | PP4/KWP4 — GPIO / PWM channel 4 |
| Pin 6 | PP5/KWP5 — GPIO / PWM channel 5 |
| Pin 7 | PP6/KWP6 — GPIO / PWM channel 6 |
| Pin 8 | PP7/KWP7 — GPIO / PWM channel 7 |
| Pin 9 | PT0/IOC0 — GPIO / Timer channel |
| Pin 10 | PT1/IOC1 — GPIO / Timer channel |
| Pin 11 | PT2/IOC2 — GPIO / Timer channel |
| Pin 12 | PT3/IOC3 — GPIO / Timer channel |
| Pin 13 | PT4/IOC4 — GPIO / Timer channel |
| Pin 14 | PT5/IOC5 — GPIO / Timer channel |
| Pin 15 | PT6/IOC6 — GPIO / Timer channel |
| Pin 16 | PT7/IOC7 — GPIO / Timer channel |
| Pin 17 | PA0/ADDR0 — Address/data bus or GPIO |
| Pin 18 | PA1/ADDR1 — Address/data bus or GPIO |
| Pin 19 | PA2/ADDR2 — Address/data bus or GPIO |
| Pin 20 | PA3/ADDR3 — Address/data bus or GPIO |
| Pin 21 | PA4/ADDR4 — Address/data bus or GPIO |
| Pin 22 | PA5/ADDR5 — Address/data bus or GPIO |
| Pin 23 | PA6/ADDR6 — Address/data bus or GPIO |
| Pin 24 | PA7/ADDR7 — Address/data bus or GPIO |
| Pin 25 | VDDR — Voltage regulator power supply |
| Pin 26 | VDD — Digital supply voltage (5V) |
| Pin 27 | VSS — Ground |
| Pin 28 | VDDPLL — PLL supply voltage |
| Pin 29 | VSSPLL — PLL ground |
| Pin 30 | XFC — PLL filter capacitor |
| Pin 31 | BKGD — Background Debug Mode / Mode select |
| Pin 32 | RESET — Reset input (active low) |
| Pin 33 | TEST — Test mode input (must be tied low) |
| Pin 34 | VDDX — I/O supply voltage |
| Pin 35 | VSSX — I/O ground |
| Pin 36 | PM0/PWM0 — GPIO / PWM channel |
| Pin 37 | PM1/PWM1 — GPIO / PWM channel |
| Pin 38 | PM2/PWM2 — GPIO / PWM channel |
| Pin 39 | PM3/PWM3 — GPIO / PWM channel |
| Pin 40 | PM4/PWM4 — GPIO / PWM channel |
| Pin 41 | PM5/PWM5 — GPIO / PWM channel |
| Pin 42 | PM6/PWM6 — GPIO / PWM channel |
| Pin 43 | PM7/PWM7 — GPIO / PWM channel |
| Pin 44 | PJ0/RXD0 — GPIO / SCI0 receive |
| Pin 45 | PJ1/TXD0 — GPIO / SCI0 transmit |
| Pin 46 | PJ2/RXD1 — GPIO / SCI1 receive |
| Pin 47 | PJ3/TXD1 — GPIO / SCI1 transmit |
| Pin 48 | PJ4/SPSCK0 — GPIO / SPI0 clock |
| Pin 49 | PJ5/MOSI0 — GPIO / SPI0 MOSI |
| Pin 50 | PJ6/MISO0 — GPIO / SPI0 MISO |
| Pin 51 | PJ7/SS0 — GPIO / SPI0 slave select |
| Pin 52 | PC0/CANRX — GPIO / CAN receive |
| Pin 53 | PC1/CANTX — GPIO / CAN transmit |
| Pin 54 | PC2/TXCAN — GPIO / CAN auxiliary |
| Pin 55 | PC3/RXCAN — GPIO / CAN auxiliary |
| Pin 56 | PC4/PWM8 — GPIO / PWM channel |
| Pin 57 | PC5/PWM9 — GPIO / PWM channel |
| Pin 58 | PC6/PWM10 — GPIO / PWM channel |
| Pin 59 | PC7/PWM11 — GPIO / PWM channel |
| Pin 60 | PD0/AN0 — GPIO / ADC input |
| Pin 61 | PD1/AN1 — GPIO / ADC input |
| Pin 62 | PD2/AN2 — GPIO / ADC input |
| Pin 63 | PD3/AN3 — GPIO / ADC input |
| Pin 64 | PD4/AN4 — GPIO / ADC input |
Typical Applications
S9S12XS64J1MAE is suitable for 6 applications: Automotive Body Control Modules, Instrument Cluster Display Drivers, HVAC Control Panels, CAN/LIN Slave Nodes, Lighting and LED Drivers, Automotive Sensor-Interface Modules.
Automotive Body Control Modules
The S9S12XS64J1MAE's CANbus connectivity, 16-bit HCS12X core at 40MHz, and 64KB Flash suit central body-control modules that coordinate lighting, wipers, and accessory relays. Why this part fits: AEC-Q100 qualification plus -40 to +125C operation guarantee operation underhood and in cabin; the 44 GPIO pins drive multiple load drivers without external mux ICs; PWM peripherals generate the timing signals needed for window lifters and motor speed control. How it's used: the MCU sits on a 5V rail alongside high-side drivers and CAN transceivers, running a CAN-based protocol such as CAN 2.0B at 500kbps; firmware size of 30-50KB fits within the 64KB budget. Compared with switching to a 32-bit ARM Cortex-M0+, the S9S12XS64J1MAE offers a more cost-effective path for legacy CAN networks and reuses established HCS12 toolchains.
Recommended
Instrument Cluster Display Drivers
Instrument clusters for two-wheelers, entry-level cars, and HVAC displays benefit from the S9S12XS64J1MAE's CAN+SCI peripheral set, 16-bit ALU, and 4KB RAM. Why this part fits: 40MHz HCS12X throughput drives segmented LCD refresh and CAN message polling within the same scan loop; 64KB Flash stores gauge maps and CAN message tables; AEC-Q100 qualification handles cabin-temperature extremes. How it's used: the MCU polls CAN for vehicle-speed/RPM/coolant-temperature data, computes filtered values, and outputs stepper-motor or LCD-segment drive signals via PWM and GPIO. Trade-off: the 4KB RAM limits simultaneous open CAN message objects, so application code must buffer selectively rather than holding all 32+ messages simultaneously.
Recommended
HVAC Control Panels
HVAC panel controllers blend temperature sensing, blower-speed control, and CAN bus reporting - a workload that fits the S9S12XS64J1MAE profile. Why this part fits: PWM channels drive blower and mode-door motors with programmable duty; 44 GPIO handle rotary encoders, pushbuttons, and LED-backlit indicators; CAN connectivity integrates with the vehicle body network. How it's used: the MCU reads NTC thermistor inputs via ADC, runs a closed-loop PI controller to set blower speed via PWM, and exchanges mode/blend-air commands over CAN at 125-500 kbps. Trade-off: designers targeting graphical TFT displays should consider the higher-memory S12XE families; segmented or monochrome interfaces fit the 64KB budget comfortably.
Recommended
CAN/LIN Slave Nodes
Body-electronics sub-modules - door, seat, mirror, and lighting - often appear as slave nodes on a CAN or LIN bus. The S9S12XS64J1MAE provides the 16-bit core, Flash budget, and connectivity needed for these compact controller roles. Why this part fits: CAN+SCI+SPI connectivity covers master and slave bus roles; 64KB Flash stores node IDs and actuator calibration tables; -40 to +125C operation supports engine-bay and door-cavity mounting. How it's used: the MCU monitors its assigned CAN IDs, actuates window motors via PWM, and reports faults over diagnostic frames. Trade-off: LIN-only nodes could use a smaller 8-bit MCU to save cost; choose the S9S12XS64J1MAE when CAN diagnostics and firmware updates are required.
Recommended
Lighting and LED Drivers
Daytime running lights, interior ambient lighting, and adaptive headlamp controllers leverage the S9S12XS64J1MAE's PWM-rich peripheral set. Why this part fits: PWM channels dim individual LED strings via MOSFET gate-drive signals; 16-bit CPU computes PWM duty with 12-bit equivalent resolution; AEC-Q100 handles underhood/headlamp module conditions. How it's used: the MCU receives CAN commands for target brightness, logs LED thermistor feedback via ADC, and adjusts PWM duty each PWM cycle. Trade-off: at high switching frequencies above 20 kHz, timer overhead can saturate the 40MHz core; designers may need to partition ISRs or move to a co-processor-equipped S12X sibling.
Recommended
Automotive Sensor-Interface Modules
Sensor-interface modules - tire pressure, parking-distance, and rain-light sensors - use the S9S12XS64J1MAE for ADC sampling and CAN reporting. Why this part fits: on-chip PWM/ADC/timer peripherals capture duty-cycle sensor outputs without external counters; CAN integration reports processed values to the body controller; automotive temperature rating survives engine-bay mounting. How it's used: the MCU times the energizing pulse to the sensor, samples the response via ADC, applies linearization, and transmits the result in a CAN frame every 10-100 ms. Trade-off: high-update-rate radar/LIDAR modules may need a faster ARM Cortex-M4; for sub-kHz sensor loops the S9S12XS64J1MAE fits comfortably.
Recommended
Recommended Products Summary
Engineering reference data for S9S12XS64J1MAE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S12XS64J1MAL | MC9S12XS64CAE | S912XEQ512J2MAL | S9S12HY32J0VLL | MC9S12DT256VPVE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP - same family | 64-LQFP - same family | 64-LQFP - same family |
| Core Architecture | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12XE 16-bit | HCS12 16-bit | HCS12D 16-bit |
| Flash Memory | 64KB | 64KB | 64KB | 512KB | 32KB | 256KB |
| RAM Size | 4KB | 4KB | 4KB | 32KB | 2KB | 12KB |
| CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 25 MHz |
| Connectivity | CAN, SCI, SPI | CAN, SCI, SPI | CAN, SCI, SPI | CAN, SCI, SPI | CAN, SCI, SPI | CAN, SCI, SPI |
| Automotive Grade (AEC-Q100) | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Number of I/O | 44 | 44 | 44 | 44 | 44 | 44 |
Key Differentiators
- Identical silicon with broader NXP S12XS family compatibility (vs MC9S12XS64CAE)
- Tailored for CANbus body networks with full AEC-Q100 qualification (vs MC9S12HY32J0VLL)
- Lower memory cost than S12XE flagship (vs S912XEQ512J2MAL)
Design Notes
Decouple VDD/VSS and VDDR/VDDX pairs with 100nF ceramic capacitors placed within 5mm of each pin pair; add a bulk 4.7-10uF tantalum or ceramic near the VDDR pin. The on-chip voltage regulator feeds the internal logic from the 5V VDDR supply - keep input ripple below 50mVpp to avoid spurious resets. Power-on sequencing: VDDR ramps first, then VDD/VDDX follow; the POR peripheral handles held-in-reset until supplies stabilize. Estimated quiescent current draw is 25-50mA in run mode at 40MHz per S12XS family datasheets.
Always tie the TEST pin to VSS via a 4.7k resistor (or directly) - leaving TEST floating can put the part in factory-test mode and lock out normal operation. The BKGD pin is used for background debug; place a 4.7k pull-up to VDD if you want default mode entry. Do not drive RESET above VDD+0.3V during programming cycles - this can damage the part. In BDM firmware-development phases, isolate the debugger header with series resistors to allow for tool-plug-noise tolerance.
Estimated: At max ambient +125C and 40MHz operating mode, junction temperature rise for the LQFP-64 package is on the order of 15-25C with a theta_JA around 50-60 C/W on a 2-layer PCB. Increase copper-pour area under the exposed pad region (or use a 4-layer board) to reduce theta_JA below 35 C/W. For underhood mounting above +105C ambient, design margin should target a max junction of +150C; this requires verifying actual theta_JA on your specific PCB stack-up.
Compliance Information
RoHS and REACH compliant per NXP product page; AEC-Q100 qualified for automotive under-hood/cabin use. Lead-free LQFP finish is standard.