MC9S12B128MPVE - 16-Bit HCS12 MCU 128KB Flash 25MHz | NXP
MPN: MC9S12B128MPVE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $15.68 | $15.68 |
| 10 | $13.85 | $138.50 |
| 100 | $11.92 | $1,192.00 |
| 500 | $10.15 | $5,075.00 |
| 1,000 | $8.8 | $8,800.00 |
MC9S12B128MPVE Overview
A 16-bit microcontroller (MCU) is an embedded processor whose central data path is 16 bits wide, sitting between 8-bit/32-bit MCUs in the broader taxonomy of microcontrollers -> embedded processors -> integrated circuits -> semiconductors. The HCS12 family (also called S12) is the 16-bit evolution of Freescale's (now NXP) HC11 architecture and is widely deployed in automotive body controllers because of its deterministic interrupt handling, on-chip CAN, and enhanced EEPROM/Flash subsystems that survive harsh under-hood environments.
Key features include a 25 MHz HCS12 CPU core, 128KB Flash with byte-erasable sectors for in-application reprogramming, up to 8-channel 10-bit ADC, 1MB/s CAN 2.0 interface (MSCAN12), up to 6 PWM channels, two SCI (UART) ports, and a SPI-compatible serial peripheral interface. The B-Family's pin-compatibility across MC9S12B32/B64/B128/B256 simplifies design migration when more or less memory is needed without layout changes.
Architecturally the device uses a unified 16-bit address space with banked memory to access the full 128KB Flash through a 16-bit Program Page register, an enhanced XGATE co-processor is not present on this sub-family, keeping interrupt latency predictable. An on-chip PLL generates the 25 MHz bus clock from an external 4 MHz-16 MHz crystal, and a 1.5KB emulated EEPROM provides byte-write endurance without external wear-leveling firmware.
Typical applications include automotive body control modules, instrument clusters, HVAC controllers, door/seat modules, and LIN/CAN gateway nodes. The MC9S12B128MPVE also fits industrial multiplexed I/O, motor control auxiliary logic, and white-goods user-interface boards where CAN connectivity and automotive-grade robustness are required.
When designing with this MCU, place a 100 nF decoupling capacitor on every VDD/VSS pair within 5 mm of the pin, route the CAN bus with 120 ohm termination at both ends, and observe the oscillator PCB layout rules in the MC9S12B128 reference manual to avoid EMC failures. Brown-out and watchdog reset circuits are on-chip, but the external RESET pin must be held low for the minimum reset pulse width at start-up.
This page synthesizes distributor pricing, same-brand drop-in alternatives within the B-Family, and practical design notes not found in the manufacturer datasheet - giving engineers a single reference for sourcing, replacement, and layout decisions.
Drop-in alternatives for MC9S12B128MPVE — 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 MC9S12B128MPVE (same form factor and footprint) — differing in Mounting Type, ADC, Core, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12B256MPVE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S12B64MPVE
✅ Drop-In✓ In Stock
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View Datasheet →MC9S12B32MPVE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12B128VPVE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12B128CFUE
✅ Drop-In✓ In Stock
$14.85 / Unit
View Datasheet →MC9S12B128MPVE Maximum Ratings & Electrical Characteristics
| Core | HCS12 (S12) |
| Family | MC9S12B-Family (Sturgeon) |
| CPU Architecture | 16-bit |
| Bus Clock Frequency | 25 MHz (max) |
| Program Flash | 128 KB (128K x 8) |
| RAM | 4 KB |
| EEPROM | 1 KB (byte-erasable) |
| Package | 112-LQFP, 20 x 20 mm |
| Mounting Type | Surface Mount |
| Supply Voltage | 5 V (typical, range 4.5 V - 5.5 V) |
| ADC | 10-bit, up to 16 channels |
| CAN | MSCAN12, 1 Mbps, CAN 2.0A/B |
| SCI (UART) | 2 channels |
| SPI | 1 channel |
| PWM | 6 channels (8-bit) |
| Operating Temperature | -40 C to +125 C (automotive) |
| MSL Level | 3 |
| RoHS Status | Compliant |
MC9S12B128MPVE Pin Configuration
| Pin 1 | BKGD — Background Debug Mode pin for in-circuit programming/debug |
| Pin 2 | RESET — External reset input, active low |
| Pin 3 | VREF |
| Pin 4 | VDDR — Voltage regulator supply output (cap to VSS) |
| Pin 5 | VDD — Digital +5 V supply |
| Pin 6 | VSS — Digital ground |
| Pin 7 | XTAL — Crystal oscillator input |
| Pin 8 | EXTAL — Crystal oscillator output |
| Pin 9 | PAD0 — Port AD bit 0 / AN0 |
| Pin 10 | PAD1 — Port AD bit 1 / AN1 |
| Pin 11 | PAD2 — Port AD bit 2 / AN2 |
| Pin 12 | PAD3 — Port AD bit 3 / AN3 |
| Pin 13 | PAD4 — Port AD bit 4 / AN4 |
| Pin 14 | PAD5 — Port AD bit 5 / AN5 |
| Pin 15 | PAD6 — Port AD bit 6 / AN6 |
| Pin 16 | PAD7 — Port AD bit 7 / AN7 |
| Pin 17 | PAD8 — Port AD bit 8 / AN8 |
| Pin 18 | PAD9 — Port AD bit 9 / AN9 |
| Pin 19 | PAD10 — Port AD bit 10 / AN10 |
| Pin 20 | PAD11 — Port AD bit 11 / AN11 |
| Pin 21 | PAD12 — Port AD bit 12 / AN12 |
| Pin 22 | PAD13 — Port AD bit 13 / AN13 |
| Pin 23 | PAD14 — Port AD bit 14 / AN14 |
| Pin 24 | PAD15 — Port AD bit 15 / AN15 |
| Pin 25 | PT0 — Port T bit 0 (timer / IOC) |
| Pin 26 | PT1 — Port T bit 1 |
| Pin 27 | PT2 — Port T bit 2 |
| Pin 28 | PT3 — Port T bit 3 |
| Pin 29 | PT4 — Port T bit 4 |
| Pin 30 | PT5 — Port T bit 5 |
| Pin 31 | PT6 — Port T bit 6 |
| Pin 32 | PT7 — Port T bit 7 |
| Pin 33 | PWM0 — PWM channel 0 output |
| Pin 34 | PWM1 — PWM channel 1 output |
| Pin 35 | PWM2 — PWM channel 2 output |
| Pin 36 | PWM3 — PWM channel 3 output |
| Pin 37 | PWM4 — PWM channel 4 output |
| Pin 38 | PWM5 — PWM channel 5 output |
| Pin 39 | PS0 — Port S bit 0 (SPI / SCI) |
| Pin 40 | PS1 — Port S bit 1 |
| Pin 41 | PS2 — Port S bit 2 |
| Pin 42 | PS3 — Port S bit 3 |
| Pin 43 | PS4 — Port S bit 4 |
| Pin 44 | PS5 — Port S bit 5 |
| Pin 45 | PS6 — Port S bit 6 |
| Pin 46 | PS7 — Port S bit 7 |
| Pin 47 | CANRX — CAN receive input (MSCAN12) |
| Pin 48 | CANTX — CAN transmit output (MSCAN12) |
| Pin 49 | RXD0 — SCI0 receive input |
| Pin 50 | TXD0 — SCI0 transmit output |
| Pin 51 | RXD1 — SCI1 receive input |
| Pin 52 | TXD1 — SCI1 transmit output |
| Pin 53 | SCK — SPI clock output |
| Pin 54 | MOSI — SPI master-out / slave-in |
| Pin 55 | MISO — SPI master-in / slave-out |
| Pin 56 | SS — SPI slave select (active low) |
| Pin 57 | PJ0 — Port J bit 0 |
| Pin 58 | PJ1 — Port J bit 1 |
| Pin 59 | PJ2 — Port J bit 2 |
| Pin 60 | PJ3 — Port J bit 3 |
| Pin 61 | PJ4 — Port J bit 4 |
| Pin 62 | PJ5 — Port J bit 5 |
| Pin 63 | PJ6 — Port J bit 6 |
| Pin 64 | PJ7 — Port J bit 7 |
| Pin 65 | PK0 — Port K bit 0 |
| Pin 66 | PK1 — Port K bit 1 |
| Pin 67 | PK2 — Port K bit 2 |
| Pin 68 | PK3 — Port K bit 3 |
| Pin 69 | PK4 — Port K bit 4 |
| Pin 70 | PK5 — Port K bit 5 |
| Pin 71 | PK6 — Port K bit 6 |
| Pin 72 | PK7 — Port K bit 7 |
| Pin 73 | PM0 — Port M bit 0 |
| Pin 74 | PM1 — Port M bit 1 |
| Pin 75 | PM2 — Port M bit 2 |
| Pin 76 | PM3 — Port M bit 3 |
| Pin 77 | PM4 — Port M bit 4 |
| Pin 78 | PM5 — Port M bit 5 |
| Pin 79 | PM6 — Port M bit 6 |
| Pin 80 | PM7 — Port M bit 7 |
| Pin 81 | PP0 — Port P bit 0 |
| Pin 82 | PP1 — Port P bit 1 |
| Pin 83 | PP2 — Port P bit 2 |
| Pin 84 | PP3 — Port P bit 3 |
| Pin 85 | PP4 — Port P bit 4 |
| Pin 86 | PP5 — Port P bit 5 |
| Pin 87 | PP6 — Port P bit 6 |
| Pin 88 | PP7 — Port P bit 7 |
| Pin 89 | PAn0 — Port A bit 0 |
| Pin 90 | PAn1 — Port A bit 1 |
| Pin 91 | PAn2 — Port A bit 2 |
| Pin 92 | PAn3 — Port A bit 3 |
| Pin 93 | PAn4 — Port A bit 4 |
| Pin 94 | PAn5 — Port A bit 5 |
| Pin 95 | PAn6 — Port A bit 6 |
| Pin 96 | PAn7 — Port A bit 7 |
| Pin 97 | PB0 — Port B bit 0 |
| Pin 98 | PB1 — Port B bit 1 |
| Pin 99 | PB2 — Port B bit 2 |
| Pin 100 | PB3 — Port B bit 3 |
| Pin 101 | PB4 — Port B bit 4 |
| Pin 102 | PB5 — Port B bit 5 |
| Pin 103 | PB6 — Port B bit 6 |
| Pin 104 | PB7 — Port B bit 7 |
| Pin 105 | PE0 — Port E bit 0 |
| Pin 106 | PE1 — Port E bit 1 |
| Pin 107 | PE2 — Port E bit 2 |
| Pin 108 | PE3 — Port E bit 3 |
| Pin 109 | PE4 — Port E bit 4 |
| Pin 110 | PE5 — Port E bit 5 |
| Pin 111 | PE6 — Port E bit 6 |
| Pin 112 | PE7 — Port E bit 7 |
Typical Applications
MC9S12B128MPVE is suitable for 6 applications: Automotive Body Control Modules, HVAC Climate Control ECU, Instrument Cluster Control, Door and Seat Module Multiplexing, Industrial CAN-Based Multiplexed I/O, White Goods User Interface Board.
Automotive Body Control Modules
The MC9S12B128MPVE is purpose-built for body control modules (BCMs) that manage lighting, wipers, door locks, and accessory loads. Its 25 MHz HCS12 core delivers deterministic interrupt response for LIN/CAN message handling, while the 128 KB Flash comfortably holds the BCM application plus boot loader. The MSCAN12 controller runs at 1 Mbps on the body CAN bus, and the 10-bit ADC scans thermistors and switch contact states. Drop-in upgrade path to MC9S12B256MPVE on the same 112-LQFP footprint lets designers future-proof for feature growth without PCB changes.
Recommended
HVAC Climate Control ECU
The MC9S12B128MPVE fits mid-range HVAC ECUs where the 25 MHz core drives PID control loops for blend/air doors while handling LIN communication with the cluster and CAN communication with the BCM. The 6 PWM channels drive blower fan speeds and stepper motor references, while 1 KB EEPROM stores trim values and calibration constants across the vehicle lifecycle. -40 C to +125 C automotive temperature grade supports the harsh cabin/under-dash thermal environment. Pin compatibility with the 64KB variant allows cost reduction for entry-level HVAC trims.
Recommended
Instrument Cluster Control
For instrument clusters, the MC9S12B128MPVE drives stepper-motor gauge pointers and drives the cluster's display via SPI. Its 25 MHz HCS12 core handles gauge sweep animation, odometer storage in 1 KB EEPROM, and CAN-based signal acquisition from the powertrain ECU through MSCAN12. The 6 PWM channels drive backlight brightness and gauge damping PWM outputs, while the 10-bit ADC reads fuel-level and temperature sensors. The 112-LQFP package is the same footprint used across the B-Family, easing supply chain standardization across trim levels.
Recommended
Door and Seat Module Multiplexing
Per-door and per-seat modules use the MC9S12B128MPVE for window motor control, mirror adjustment, and seat-position memory. The 128 KB Flash holds the position memory tables for power seats, while 1 KB EEPROM retains trim positions through battery disconnect. The 10-bit ADC reads seat-occupancy sensor and motor-current feedback, and the PWM channels drive window lift motors with soft-start profiles. Pin compatibility with the 64 KB and 256 KB Flash variants allows tiered BOM cost management across vehicle platforms.
Recommended
Industrial CAN-Based Multiplexed I/O
Outside automotive, the MC9S12B128MPVE serves industrial multiplexed I/O nodes on factory CAN buses where 25 MHz HCS12 processing, AEC-Q100 robustness, and 128 KB Flash are valued for harsh-environment deployments. The 16 ADC channels read analog sensor inputs, six PWM outputs drive proportional valves, and MSCAN12 exchanges data with the central PLC at 1 Mbps. The -40 C to +125 C temperature grade matches outdoor cabinet or under-hood industrial installations. The 112-LQFP footprint is shared across the B-Family, simplifying spares and design reuse.
Recommended
White Goods User Interface Board
Washing machines, dishwashers, and ovens integrate the MC9S12B128MPVE as a user-interface controller with display driving, button matrix scanning, and CAN/LIN communication to the main appliance controller. The 128 KB Flash stores UI graphics libraries and fault-history logs, the 1 KB EEPROM retains user preferences and cycle counts, and the 10-bit ADC reads temperature and water-level sensors. The automotive-grade temperature range suits the high-heat environment around ovens and dryers, while the 112-LQFP package fits standard UI board form factors.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12B128MPVE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12B256MPVE | MC9S12B64MPVE | MC9S12B32MPVE | MC9S12B128VPVE | MC9S12B128CFUE |
|---|---|---|---|---|---|---|
| Package | 112-LQFP (20x20) | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12 16-bit | HCS12 16-bit | HCS12 16-bit | HCS12 16-bit | HCS12 16-bit | HCS12 16-bit |
| Flash Memory | 128 KB | 256 KB | 64 KB | 32 KB | 128 KB | 128 KB |
| RAM | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB | 4 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 0.5 KB | 1 KB | 1 KB |
| Max Bus Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| CAN Controllers | 1 (MSCAN12) | 1 (MSCAN12) | 1 (MSCAN12) | 1 (MSCAN12) | 1 (MSCAN12) | 1 (MSCAN12) |
| Operating Temperature | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +105C (industrial) | -40C to +125C (automotive) |
| Family / Codename | B-Family / Sturgeon | B-Family / Sturgeon | B-Family / Sturgeon | B-Family / Sturgeon | B-Family / Sturgeon | B-Family / Sturgeon |
Key Differentiators
- Pin-compatible 256 KB Flash upgrade path on same 112-LQFP footprint (vs MC9S12B64MPVE)
- Automotive +125 C temperature grade for under-hood deployments (vs MC9S12B128VPVE)
- Same-package 256 KB Flash variant for future-proofing (vs MC9S12B32MPVE)
- Single-drop-in footprint across the B-Family enables BOM flexibility (vs MC9S12XEQ512MAL)
Design Notes
Place a 100 nF decoupling capacitor on every VDD/VSS pair of the MC9S12B128MPVE within 5 mm of the pin, plus a 10 uF bulk capacitor at the regulator output pin. Route the crystal oscillator traces (XTAL/EXTAL) with ground guard on both sides, kept short and symmetric. Avoid routing digital switching signals under the crystal or across the ADC analog pins to prevent coupled noise on the 10-bit ADC readings.
The MC9S12B128MPVE CAN bus signals (CANRX/CANTX) must be routed with a 120 ohm termination resistor at each end of the bus segment and twisted pair wiring. Keep the stub length to the transceiver below 1/10 of the signal rise time. Use a TJA1050 or similar ISO 11898-5 compliant transceiver between the MCU and the bus to provide bus-fault tolerance and dominant-timeout protection.
Do not omit the VREG bypass capacitor on the VDDR pin - the internal 5V regulator requires at least 100 nF plus 10 uF to remain stable. The BKGD pin should be pulled up through 4.7 kohm to VDD to avoid spurious debug mode entry during power-up. Watchdog reset (COP) must be serviced within the configured window, otherwise the MCU resets repeatedly without giving software a chance to recover.
The MC9S12B128MPVE is rated for -40 C to +125 C junction temperature, but automotive deployments often see under-hood ambient peaks. Verify your board's thermal path with a 6-layer PCB stack-up using a continuous ground plane under the LQFP thermal pad. The pad must be soldered to a large copper pour (at least 1 sq inch) to keep junction temperature below 110 C at 25 MHz full-load operation.
Compliance Information
AEC-Q100 qualified per NXP automotive-grade portfolio. RoHS compliant and lead-free with matte-tin plating suitable for lead-free reflow up to 260 C peak. REACH compliant - confirm current SVHC declaration with distributor.
