S9S12DP51J4MPVE - 16-Bit 50MHz 256KB Flash MCU | NXP | 112-LQFP
MPN: S9S12DP51J4MPVE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $48.5 | $48.50 |
| 10 | $43.65 | $436.50 |
| 100 | $38.8 | $3,880.00 |
| 500 | $34.95 | $17,475.00 |
| 1,000 | $31.1 | $31,100.00 |
S9S12DP51J4MPVE Overview
A microcontroller (MCU) is a single-chip processor that integrates a CPU, non-volatile program memory (Flash), volatile working memory (RAM), on-chip peripherals, and support logic in a single package. It belongs to the broader hierarchy of microcontrollers -> embedded processors -> system-on-chip -> semiconductor devices. The 16-bit HCS12/CPU12 architecture positions the S12D family between 8-bit legacy MCUs (used for simple control loops) and 32-bit ARM Cortex-M devices (used for higher-performance digital signal processing), making it well suited for deterministic real-time control in harsh environments.
Key features include 256 KB of embedded Flash for application code and parameter storage, 50 MHz CPU clock delivering 1.5 MIPS per MHz of 16-bit CISC performance, an on-chip 5V regulator for automotive 12V battery input, CAN and SCI/UART/SPI/I2C communication peripherals, and a 16-channel 10-bit ADC. The 112-LQFP package provides generous I/O count (digital GPIO plus analog inputs) with leads on all four sides for high-density board routing, while automotive-qualified silicon supports extended temperature operation.
Typical applications include automotive body controllers, HVAC control modules, instrument clusters, industrial PLC I/O expansion cards, and machine-to-machine gateway nodes. The wide 5V-tolerant I/O and CAN interfaces make it particularly well matched to SAE J1939 and CANopen networks used in commercial vehicles.
When designing with this MCU, verify the available memory map and peripheral channel count against the application firmware requirements, since the S12D family spans variants with different Flash/RAM sizes and peripheral mixes. Confirm Flash endurance and retention ratings versus the expected write-cycle profile before deployment in safety-critical or long-life installations.
Drop-in alternatives for S9S12DP51J4MPVE — 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 S9S12DP51J4MPVE (same form factor and footprint) — differing in Package, Core, ADC, PWM Channels, Program Memory Size.
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View Datasheet →S9S12DP51J4MPVE Maximum Ratings & Electrical Characteristics
| Core | CPU12 (HCS12) |
| Data Bus Width | 16 bit |
| Program Memory Size | 256 KB (256K x 8) FLASH |
| Maximum Clock Frequency | 50 MHz |
| Package | 112-LQFP (20 x 20 mm) |
| Pin Count | 112 |
| Mounting Type | Surface Mount |
| Supply Voltage | 5 V (internal regulator from 12 V battery) |
| Communication Interfaces | CAN, SCI/UART, SPI, I2C |
| Series | S12D (automotive and industrial) |
S9S12DP51J4MPVE 112-lqfp (20 x 20 mm) Pin Configuration Guide
Pin configuration for S9S12DP51J4MPVE (112-lqfp (20 x 20 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 S9S12DP51J4MPVE.
Refer to the datasheet for full pin configuration.
Typical Applications
S9S12DP51J4MPVE is suitable for 7 applications: Automotive Body Control Module, HVAC Control Module, Industrial PLC I/O Expansion, CAN-Based Machine-to-Machine Gateway Node, Instrument Cluster Controller, Battery Management Auxiliary MCU, Commercial Vehicle Telematics Box.
Automotive Body Control Module
The S9S12DP51J4MPVE integrates 256 KB Flash, a CAN 2.0A/B controller, and an on-chip 5V regulator accepting 12V automotive battery input, making it well matched to body control modules (BCMs) that coordinate lighting, central locking, wipers, and accessory loads. Its 16-bit CPU12 core at 50 MHz provides deterministic 16-bit CISC instruction execution for OSEK/OSEK-OS real-time schedulers, while the integrated 10-bit ADC is sufficient for switch debouncing and ambient-light sensing. Compared with 32-bit ARM Cortex-M parts, the DP51J4 offers wider 5V-tolerant digital I/O, eliminating the need for external level shifters in body-wiring harnesses. Typical placement is as the master BCM controller on CAN bus node 0x100 with software-controlled power management via the integrated voltage regulator.
Recommended
HVAC Control Module
The S9S12DP51J4MPVE's 112-pin LQFP package exposes enough GPIO and ADC channels for HVAC control modules that drive multiple stepper motors for blend/air-mode doors, read cabin and ambient temperature sensors, and exchange comfort setpoints with the rest of the vehicle via CAN. With 256 KB Flash available, engineers can run HVAC control loops plus diagnostics in a single device without external memory. The CPU12 core executes the HVAC scheduler in 16-bit arithmetic for accurate temperature calculations, while 5V-tolerant I/O interfaces directly to blower-motor drivers and resistor-network sensor inputs.
Recommended
Industrial PLC I/O Expansion
For industrial PLC I/O expansion cards the S9S12DP51J4MPVE delivers 256 KB Flash, SCI/UART for backplane communication with the main PLC CPU, SPI for high-speed digital I/O modules, and 16-bit timer channels for precise pulse counting. Its wide operating temperature range (extended automotive grade) supports factory-floor cabinets without additional thermal management, and the 112-LQFP package allows straightforward PCB routing of isolated digital-input, digital-output, and analog-input channels. The 50 MHz CPU12 throughput is adequate for deterministic scan-time control in IEC 61131-3 applications where tight, predictable loop times are essential.
Recommended
CAN-Based Machine-to-Machine Gateway Node
In machine-to-machine gateway nodes that aggregate CAN/J1939 traffic from off-highway equipment and forward it to a cloud gateway, the S9S12DP51J4MPVE provides the on-chip CAN module plus SCI/SPI for cellular or Ethernet companion chips. The 256 KB Flash accommodates TCP/IP-over-UART stacks, J1939 protocol libraries, and encryption modules. Automotive-grade temperature tolerance suits outdoor deployments, and the 112-LQFP package fits compact IP67 enclosures with conformal-coated assemblies common in heavy-equipment telematics boxes.
Recommended
Instrument Cluster Controller
The S9S12DP51J4MPVE is suitable as the main MCU inside digital instrument clusters, where it reads vehicle CAN traffic, drives segmented-LCD or stepper-motor gauges, and manages tell-tale LEDs. Its 112-pin package exposes enough digital I/O for the typical cluster backlight drivers, button inputs, and tachometer outputs, while 256 KB Flash supports cluster graphics libraries plus J1939 diagnostic protocols. Integrated PWM channels allow direct drive of analog-style gauges without an external timer chip.
Recommended
Battery Management Auxiliary MCU
In 12V/24V lead-acid battery management units for commercial vehicles, the S9S12DP51J4MPVE can serve as the supervisory MCU that monitors cell voltages via the on-chip 10-bit ADC, drives isolation FETs, and reports state-of-charge and state-of-health over CAN to the vehicle network. The integrated 5V regulator accepts direct 12V battery input, simplifying the power tree, and 256 KB Flash accommodates coulomb-counting algorithms with margin for firmware updates over CAN (UDS/KWP2000).
Recommended
Commercial Vehicle Telematics Box
Telematics boxes for commercial vehicles benefit from the S9S12DP51J4MPVE's CAN module for OBD-II/J1939 message logging, SCI/SPI for cellular/GPS companion modules, and automotive temperature rating for under-dash mounting. The 256 KB Flash captures firmware for CAN message filtering, event-triggered logging, and over-the-air update slots. The 112-LQFP package provides ample GPIO to support multiple SIM card interfaces and LED status indicators.
Recommended
Recommended Products Summary
Engineering reference data for S9S12DP51J4MPVE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12DP512MPVE | MC9S12XDP512VAG | S912XEQ512J2MAL | MC9S12C96CFAE557 | MC9S12DT256VPVE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors (formerly Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| 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 |
| Flash Memory Size | 256 KB | 512 KB | 512 KB | 512 KB | 96 KB | 256 KB |
| CPU Core | CPU12 (HCS12) 16-bit | CPU12 16-bit | CPU12X + XGATE coprocessor | CPU12XE enhanced | CPU12 16-bit | CPU12 16-bit |
| Maximum Clock Frequency | 50 MHz | 50 MHz | 40 MHz | 50 MHz | 25 MHz | 25 MHz |
| CAN Module | Yes (CAN 2.0A/B) | Yes (CAN 2.0A/B) | Yes (CAN 2.0A/B) | Yes (msCAN) | Yes (msCAN) | Yes (CAN 2.0A/B) |
| Series / Family | S12D (automotive/industrial) | S12DP | S12XD (with XGATE) | S12XE (enhanced) | S12C (cost-down) | S12DT |
Key Differentiators
- Highest-density drop-in upgrade via MC9S12DP512MPVE (vs MC9S12DP512MPVE)
- Same-package S12X variant adds XGATE coprocessor for DSP workloads (vs MC9S12XDP512VAG)
- Cost-down path to MC9S12C96CFAE557 in same footprint (vs MC9S12C96CFAE557)
Design Notes
Estimated: The S9S12DP51J4MPVE accepts an automotive 12V battery feed via its on-chip 5V regulator (5V tolerance on digital I/O). Provide bulk capacitance on VDDR (typically 10 uF ceramic + 1 uF decoupling) placed within 5 mm of the supply pin, plus a 100 nF ceramic on each AVDD/VDDPLL rail to suppress switching transients. Hold RESET low until VDDR stabilises for at least 1 ms to avoid spurious start-up.
Estimated: At the maximum 50 MHz CPU clock with all peripherals active the LQFP-112 device dissipates approximately 1.0 to 1.5 W. The 112-LQFP has a theta_JA on the order of 30 to 35 C/W on a standard 4-layer JEDEC test PCB, resulting in a junction temperature rise of roughly 30 to 50 C above ambient. For sealed automotive enclosures with ambient up to 85 C, observe the S12D family maximum junction temperature of 150 C and consider copper pours on all four sides of the package.
Place the 4 MHz-16 MHz crystal / resonator as close as possible to EXTAL/XTAL pins and route the oscillator traces with a guard ring tied to ground on both sides. Keep the CANH/CANL routing symmetric and length-matched within 5 mm to avoid EMI emission asymmetry. Decoupling capacitors (100 nF X7R) should sit within 2 mm of each power pin and use wide short traces for low inductance.
Common pitfalls: (1) Confusing the Freescale-branded S9S12 with later NXP-branded MC9S12 variants when sourcing production stock - cross-check the device marking. (2) Forgetting to enable the internal voltage regulator wait state sequence on BDM-based debug tools. (3) Programming Flash at the boundary of the guaranteed 100 K cycle endurance, which silently fails after Flash endurance is exhausted - for high-write applications store parameters in EEPROM / external NVM. (4) Forgetting to set the MODE register to Normal Single-Chip mode before initial programming.
Compliance Information
Compliance data not present in the verified web data retrieved 2026-10-19. The part is part of NXP's automotive/industrial S12D family, so automotive and lead-free certifications are likely but should be confirmed against the device marking and the manufacturer declaration of conformity before automotive-grade deployment.
