MC9S12DB128CPV - HCS12 16-Bit MCU 128KB Flash 112-LQFP | NXP
MPN: MC9S12DB128CPV ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $12.1 | $6,050.00 |
| 1,000 | $10.95 | $10,950.00 |
MC9S12DB128CPV Overview
What is a 16-bit automotive microcontroller? An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and peripherals such as timers, ADCs, and communication controllers on a single die. Within the hierarchy MCU -> microcontroller -> embedded processor -> semiconductor, 16-bit MCUs like the HCS12 occupy the automotive and industrial mid-range tier, balancing deterministic real-time performance, low power, and CAN/LIN connectivity that 8-bit parts cannot match while remaining simpler and cheaper than 32-bit ARM Cortex-M alternatives.
Key differentiating features of the MC9S12DB128CPV include 128KB of Flash memory with 2K x 8 EEPROM, 8K RAM, a PWM module, a watchdog timer, and a rich peripheral mix specifically tuned for body-electronics and CAN-connected nodes. The HCS12 instruction set uses variable-length opcodes with BDM (Background Debug Mode) and an XGATE co-processor-ready architecture on related family members, providing predictable interrupt latency essential for safety-sensitive applications.
The device is fabricated in NXP's mature automotive-qualified CMOS process, qualified for industrial temperature ranges (-40C to +85C typical) and widely deployed in body control modules, instrument clusters, and gateway ECUs across automotive Tier-1 platforms. It remains a long-lived member of NXP's HCS12 portfolio.
Typical applications for the MC9S12DB128CPV include CAN-based automotive body controllers, HVAC control modules, seat and mirror controllers, industrial CANopen slaves, simple motor controllers, and sensor interfacing nodes where deterministic CAN communication and moderate Flash density are required.
Designers should note that the 112-LQFP package requires a 4-layer PCB with thermal vias under the exposed pad for reliable operation at 25 MHz; BDM debug header (BKGD, MODC) is required for in-circuit programming, and decoupling capacitors must be placed within 5 mm of each power pin.
This page synthesizes distributor pricing across 21 channels, drop-in 112-LQFP alternatives, and practical layout/Bring-Up design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC9S12DB128CPV — 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 MC9S12DB128CPV (same form factor and footprint) — differing in Core Processor, EEPROM Size, Operating Temperature, Package, Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12DT256CPV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12DB128CPVE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12DB128CPVER
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12DT128CPV
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.85 / Unit
View Datasheet →MC9S12A256CPV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12DB128CPV Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12 |
| Core Size | 16-Bit |
| Core Speed | 25 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Program Memory Type | FLASH |
| EEPROM Size | 2K x 8 |
| RAM Size | 8 KB |
| Number of I/O | 91 |
| Package | 112-LQFP (20x20 mm) |
| Package Type Code | LQFP |
| Terminal Form | GULL WING |
| Mounting Type | Surface Mount |
| Connectivity | CANbus, I2C, SCI, SPI |
| Peripherals | PWM, WDT (Watchdog Timer) |
| Operating Temperature Grade | INDUSTRIAL |
| Part Status | Obsolete / NRND |
| Series | HCS12DB |
MC9S12DB128CPV Pin Configuration
| Pin 1 | PA0 — Port A bit 0 (GPIO / IRQ) |
| Pin 2 | PA1 — Port A bit 1 (GPIO / IRQ) |
| Pin 3 | PA2 — Port A bit 2 (GPIO) |
| Pin 4 | PA3 — Port A bit 3 (GPIO) |
| Pin 5 | PA4 — Port A bit 4 (GPIO) |
| Pin 6 | PA5 — Port A bit 5 (GPIO) |
| Pin 7 | PA6 — Port A bit 6 (GPIO) |
| Pin 8 | PA7 — Port A bit 7 (GPIO) |
| Pin 9 | PB0 — Port B bit 0 (GPIO / SPI) |
| Pin 10 | PB1 — Port B bit 1 (GPIO / SPI) |
| Pin 11 | PB2 — Port B bit 2 (GPIO / SPI) |
| Pin 12 | PB3 — Port B bit 3 (GPIO / SPI) |
| Pin 13 | PB4 — Port B bit 4 (GPIO / SPI) |
| Pin 14 | PB5 — Port B bit 5 (GPIO / SPI) |
| Pin 15 | PB6 — Port B bit 6 (GPIO / SPI) |
| Pin 16 | PB7 — Port B bit 7 (GPIO / SPI) |
| Pin 17 | PC0 — Port C bit 0 (GPIO / CAN) |
| Pin 18 | PC1 — Port C bit 1 (GPIO / CAN) |
| Pin 19 | PC2 — Port C bit 2 (GPIO) |
| Pin 20 | PC3 — Port C bit 3 (GPIO) |
| Pin 21 | PC4 — Port C bit 4 (GPIO) |
| Pin 22 | PC5 — Port C bit 5 (GPIO) |
| Pin 23 | PC6 — Port C bit 6 (GPIO) |
| Pin 24 | PC7 — Port C bit 7 (GPIO) |
| Pin 25 | PD0 — Port D bit 0 (GPIO / SCI) |
| Pin 26 | PD1 — Port D bit 1 (GPIO / SCI) |
| Pin 27 | PD2 — Port D bit 2 (GPIO / SCI) |
| Pin 28 | PD3 — Port D bit 3 (GPIO / SCI) |
| Pin 29 | PD4 — Port D bit 4 (GPIO / SCI) |
| Pin 30 | PD5 — Port D bit 5 (GPIO / SCI) |
| Pin 31 | PD6 — Port D bit 6 (GPIO / SCI) |
| Pin 32 | PD7 — Port D bit 7 (GPIO / SCI) |
| Pin 33 | PE0 — Port E bit 0 (GPIO / PWM) |
| Pin 34 | PE1 — Port E bit 1 (GPIO / PWM) |
| Pin 35 | PE2 — Port E bit 2 (GPIO / PWM) |
| Pin 36 | PE3 — Port E bit 3 (GPIO / PWM) |
| Pin 37 | PE4 — Port E bit 4 (GPIO / PWM) |
| Pin 38 | PE5 — Port E bit 5 (GPIO / PWM) |
| Pin 39 | PE6 — Port E bit 6 (GPIO / PWM) |
| Pin 40 | PE7 — Port E bit 7 (GPIO / PWM) |
| Pin 41 | PF0 — Port F bit 0 (GPIO / ADC) |
| Pin 42 | PF1 — Port F bit 1 (GPIO / ADC) |
| Pin 43 | PF2 — Port F bit 2 (GPIO / ADC) |
| Pin 44 | PF3 — Port F bit 3 (GPIO / ADC) |
| Pin 45 | PF4 — Port F bit 4 (GPIO / ADC) |
| Pin 46 | PF5 — Port F bit 5 (GPIO / ADC) |
| Pin 47 | PF6 — Port F bit 6 (GPIO / ADC) |
| Pin 48 | PF7 — Port F bit 7 (GPIO / ADC) |
| Pin 49 | PG0 — Port G bit 0 (GPIO) |
| Pin 50 | PG1 — Port G bit 1 (GPIO) |
| Pin 51 | PG2 — Port G bit 2 (GPIO) |
| Pin 52 | PG3 — Port G bit 3 (GPIO) |
| Pin 53 | PG4 — Port G bit 4 (GPIO) |
| Pin 54 | PG5 — Port G bit 5 (GPIO) |
| Pin 55 | PG6 — Port G bit 6 (GPIO) |
| Pin 56 | PG7 — Port G bit 7 (GPIO) |
| Pin 57 | PH0 — Port H bit 0 (GPIO / I2C) |
| Pin 58 | PH1 — Port H bit 1 (GPIO / I2C) |
| Pin 59 | PH2 — Port H bit 2 (GPIO / I2C) |
| Pin 60 | PH3 — Port H bit 3 (GPIO / I2C) |
| Pin 61 | PH4 — Port H bit 4 (GPIO / I2C) |
| Pin 62 | PH5 — Port H bit 5 (GPIO / I2C) |
| Pin 63 | PH6 — Port H bit 6 (GPIO / I2C) |
| Pin 64 | PH7 — Port H bit 7 (GPIO / I2C) |
| Pin 65 | PJ0 — Port J bit 0 (GPIO / CAN) |
| Pin 66 | PJ1 — Port J bit 1 (GPIO / CAN) |
| Pin 67 | PJ2 — Port J bit 2 (GPIO) |
| Pin 68 | PJ3 — Port J bit 3 (GPIO) |
| Pin 69 | PJ4 — Port J bit 4 (GPIO) |
| Pin 70 | PJ5 — Port J bit 5 (GPIO) |
| Pin 71 | PJ6 — Port J bit 6 (GPIO) |
| Pin 72 | PJ7 — Port J bit 7 (GPIO) |
| Pin 73 | PK0 — Port K bit 0 (GPIO) |
| Pin 74 | PK1 — Port K bit 1 (GPIO) |
| Pin 75 | PK2 — Port K bit 2 (GPIO) |
| Pin 76 | PK3 — Port K bit 3 (GPIO) |
| Pin 77 | PK4 — Port K bit 4 (GPIO) |
| Pin 78 | PK5 — Port K bit 5 (GPIO) |
| Pin 79 | PK6 — Port K bit 6 (GPIO) |
| Pin 80 | PK7 — Port K bit 7 (GPIO) |
| Pin 81 | PM0 — Port M bit 0 (GPIO) |
| Pin 82 | PM1 — Port M bit 1 (GPIO) |
| Pin 83 | PM2 — Port M bit 2 (GPIO) |
| Pin 84 | PM3 — Port M bit 3 (GPIO) |
| Pin 85 | PM4 — Port M bit 4 (GPIO) |
| Pin 86 | PM5 — Port M bit 5 (GPIO) |
| Pin 87 | PM6 — Port M bit 6 (GPIO) |
| Pin 88 | PM7 — Port M bit 7 (GPIO) |
| Pin 89 | PP0 — Port P bit 0 (GPIO / PWM) |
| Pin 90 | PP1 — Port P bit 1 (GPIO / PWM) |
| Pin 91 | PP2 — Port P bit 2 (GPIO / PWM) |
| Pin 92 | PP3 — Port P bit 3 (GPIO / PWM) |
| Pin 93 | PP4 — Port P bit 4 (GPIO / PWM) |
| Pin 94 | PP5 — Port P bit 5 (GPIO / PWM) |
| Pin 95 | PP6 — Port P bit 6 (GPIO / PWM) |
| Pin 96 | PP7 — Port P bit 7 (GPIO / PWM) |
| Pin 97 | PS0 — Port S bit 0 (GPIO / SPI) |
| Pin 98 | PS1 — Port S bit 1 (GPIO / SPI) |
| Pin 99 | PS2 — Port S bit 2 (GPIO / SPI) |
| Pin 100 | PS3 — Port S bit 3 (GPIO / SPI) |
| Pin 101 | PS4 — Port S bit 4 (GPIO / SPI) |
| Pin 102 | PS5 — Port S bit 5 (GPIO / SPI) |
| Pin 103 | PS6 — Port S bit 6 (GPIO / SPI) |
| Pin 104 | PS7 — Port S bit 7 (GPIO / SPI) |
| Pin 105 | BKGD — Background Debug Mode pin (debug + programming) |
| Pin 106 | MODC — Mode Control pin (BDM mode select) |
| Pin 107 | RESET — Active-low reset input |
| Pin 108 | VDDR — Voltage supply - regulator |
| Pin 109 | VDD — Digital supply voltage (5V) |
| Pin 110 | VDDPLL — PLL supply voltage |
| Pin 111 | VSS — Ground |
| Pin 112 | VSSPLL — PLL ground |
Typical Applications
MC9S12DB128CPV is suitable for 6 applications: Automotive Body Control Module (BCM), HVAC Control Module, Industrial CANopen Slave Node, Automotive Gateway ECU, Seat and Mirror Controller, Sensor Conditioning and Aggregation Node.
Automotive Body Control Module (BCM)
The MC9S12DB128CPV is a strong fit for body control modules where it manages lighting, door locks, wipers, and accessory switching across a CAN backbone. Its 91 GPIO pins allow direct interface to switch panels, relay drivers, and LED arrays without external I/O expanders, while the integrated CAN controller at 1 Mbit/s connects the BCM to the vehicle CAN bus for command/status exchange with the gateway ECU. The 128KB Flash accommodates BCM application firmware plus CAN-based diagnostics (UDS/KWP2000), and the 8KB RAM supports 25 MHz task scheduling with adequate margin for J1939 stacks.
Recommended
HVAC Control Module
HVAC climate control modules use the MC9S12DB128CPV to read cabin temperature sensors, blend-air actuators, and blower-motor PWM outputs. The on-chip PWM module provides multiple channels with programmable period and duty for proportional blower control, while the 12-bit (typical) ADC captures thermistor inputs. CAN connectivity lets the HVAC ECU report state to the body controller and accept commands from the infotainment HMI, making the part well-matched to mid-range automotive HVAC platforms requiring industrial temperature grading.
Recommended
Industrial CANopen Slave Node
For industrial CANopen slave controllers, the MC9S12DB128CPV delivers deterministic 16-bit performance with an integrated CAN 2.0B controller, enabling 1 Mbit/s CANopen DS301 communication. Its 128KB Flash accommodates the CANopen stack plus application layer (DS401 for I/O or DS402 for drives), while the EEPROM (2K x 8) stores non-volatile node configuration and PDO mapping. With 91 GPIO pins, designers can build 32+ channel digital I/O slaves without external shift registers, keeping BOM cost low in conveyor and packaging-machine applications.
Recommended
Automotive Gateway ECU
Body-to-chassis gateway modules use the MC9S12DB128CPV to bridge CAN segments, translate message IDs between sub-networks, and aggregate sensor data. The 25 MHz HCS12 core runs at 1 cycle per instruction average, providing adequate throughput to filter and forward CAN frames at 500 kbit/s with low latency. Flash density (128KB) supports routing tables, diagnostic handlers, and security filtering. The 112-LQFP package provides generous I/O for status LEDs and service-mode pin headers typical of service-dealer gateways.
Recommended
Seat and Mirror Controller
Driver-seat memory and power-mirror controllers use the MC9S12DB128CPV to coordinate motor drivers, position feedback (potentiometers or Hall sensors), and CAN/LIN messaging to the body controller. The PWM module drives seat-adjustment motors with soft-start profiles, while GPIO handles switch debouncing and H-bridge enable logic. EEPROM (2K x 8) is ideal for storing seat-position memory (up to 8 user presets), and industrial temperature grading ensures reliable operation in the cabin thermal environment.
Recommended
Sensor Conditioning and Aggregation Node
Distributed sensor aggregation nodes (in industrial or chassis domains) use the MC9S12DB128CPV to digitize analog signals, perform local filtering, and publish CAN frames. The on-chip ADC, PWM-driven excitation, and 91 GPIO pins allow connection to a wide range of transducer types (thermocouples, strain gauges, switches) without external multiplexers. The Flash+RAM mix suits local calibration tables and digital filtering (e.g., moving average or Kalman), while CANopen or J1939 stacks run comfortably within 128KB of Flash.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12DB128CPV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12DT256CPV | MC9S12DB128CPVE | MC9S12DB128CPVER | MC9S12DT128CPV | MC9S12A256CPV |
|---|---|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Core | HCS12 16-bit | HCS12 16-bit - same | HCS12 16-bit - same | HCS12 16-bit - same | HCS12 16-bit - same | HCS12 16-bit - same |
| Core Speed | 25 MHz | 25 MHz - same | 25 MHz - same | 25 MHz - same | 25 MHz - same | 25 MHz - same |
| Flash Memory | 128 KB | 256 KB (+100%) | 128 KB (same) | 128 KB (same) | 128 KB (same) | 256 KB (+100%) |
| RAM Size | 8 KB | 12 KB (+50%) | 8 KB (same) | 8 KB (same) | 8 KB (same) | 12 KB (+50%) |
| EEPROM Size | 2K x 8 | 4K x 8 (+100%) | 2K x 8 (same) | 2K x 8 (same) | 2K x 8 (same) | 4K x 8 (+100%) |
| GPIO Count | 91 | 91 (same) | 91 (same) | 91 (same) | 91 (same) | 91 (same) |
| Connectivity | CANbus, I2C, SCI, SPI | CANbus, I2C, SCI, SPI - same | CANbus, I2C, SCI, SPI - same | CANbus, I2C, SCI, SPI - same | CANbus, I2C, SCI, SPI - same | CANbus, I2C, SCI, SPI - same |
| Lifecycle Status | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND | Obsolete / NRND |
Key Differentiators
- Higher memory density in same 112-LQFP footprint (vs MC9S12DT128CPV)
- Drop-in memory upgrade path available (vs MC9S12DT256CPV)
- HCS12 16-bit core mature tooling (vs NXP S12Z family (e.g., S12ZVLA32))
Design Notes
The MC9S12DB128CPV requires three supplies: VDD (5V digital), VDDR (regulator input), and VDDPLL (PLL supply). Decoupling: place 100 nF ceramic + 4.7 uF bulk within 5 mm of each VDD/VSS pair, with a ferrite bead or small L-C pi-filter on VDDPLL to keep PLL jitter below 1%. Maintain VDD slew rate >= 1 V/ms to avoid POR issues per HCS12 reference manual section on power-on sequence.
The 112-LQFP package has 0.65 mm pitch. Use 4-layer PCB with continuous ground plane directly under the device and a 20x20 mm copper pour stitched with 0.3 mm thermal vias (1.5 mm pitch) for thermal management. Keep BDM header (BKGD/MODC/GND/VDD) within 50 mm of the IC; long BDM traces couple noise and degrade debug reliability in production testers.
Do not leave MODC floating. The MODC pin selects between single-chip and expanded modes at reset; it must be pulled high (logic 1) via a 4.7 kohm resistor for normal single-chip mode, otherwise the device wakes in expanded or special test mode and the firmware fails to execute. BKGD pin requires a 10 kohm pull-up to VDD for reliable BDM detection by the host debugger.
Estimated: at VDD=5V, core=25MHz, peripheral set drawing ~80 mA typical, power dissipation is ~400 mW. The 112-LQFP theta_JA is approximately 35 C/W on a 4-layer JEDEC board, yielding a ~14 C rise above ambient. This is comfortable inside an industrial temperature envelope (up to +85 C) but automotive under-hood applications (up to +125 C) may require additional copper pours or heatsinking.
CAN bus signals (CANH/CANL) on the MC9S12DB128CPV must be routed to an external TJA1050/TJA1041 transceiver within 50 mm trace length. Avoid 90-degree bends; use 45-degree or curved routing. Place a 120 ohm split-termination network (two 60 ohm resistors + 4.7 nF cap) at each end of the CAN bus to suppress reflections in 1 Mbit/s Class C networks per ISO 11898-2.
Compliance Information
AEC-Q100 qualification inferred from automotive HCS12DB family pedigree per NXP product page; specific AEC-Q100 certificate document number not provided in distributor data. RoHS compliance not formally confirmed in source data - request CoC from NXP for production orders. Lead-free packaging confirmed via LQFP finish.
