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NXP Semiconductors MM912JP812AMAF
- Part No.:
- MM912JP812AMAF
- Manufacturer:
- NXP Semiconductors
- Category:
- Application Specific Microcontrollers
- Package:
- 100-LQFP Exposed Pad
- Datasheet:
-
MM912JP812AMAF.pdf
- Description:
- IC DRVR INJECTOR/IGN 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,373
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Product details
Overview
MM912JP812AMAF from NXP (formerly Freescale) is a System-in-Package (SiP) engine control IC integrating an S12P 16-bit MCU with 128 KB flash and 6 KB RAM, and the MC33812 analog power driver die. It delivers integrated low-side injector, lamp, and relay drivers plus ignition pre-driver circuitry for motorcycle and small single/dual-cylinder engine ECU applications. Operating from 4.7 V to 36 V, it includes ISO-9141 K-Line interface and MCU watchdog.
For engineers reviewing the MM912JP812AMAF datasheet, MM912JP812AMAF pinout, MM912JP812AMAF application, or MM912JP812AMAF equivalent, key selection considerations include its 100-pin LQFP-EP package, dual-die SiP architecture, 128 KB flash configuration, integrated ignition pre-driver with IGNOUTL/IGNOUTH outputs, and fault reporting via INJFLT/RELFLT/IGNFLT signals.
Technical Context
The MM912JP812AMAF combines two functionally distinct dies: the S12P MCU core implements error-correcting flash memory (ECC), a frequency-modulated PLL (IPLL) for enhanced EMC, a 12-bit 10-channel ATD converter, and msCAN 2.0B interface; the MC33812 analog die provides three independent low-side drivers (injector, lamp, relay), one high-current pre-driver for IGBT/Darlington ignition coils, +5.0 V VCC pre-regulation, and ISO-9141 K-Line transceiver logic.
Control is implemented via parallel digital interfaces: INJIN, LAMPIN, RIN, and IGNIN are MCU-driven inputs to respective analog outputs; fault status is reported back via open-drain outputs INJFLT, RELFLT, and IGNFLT; watchdog refresh uses WDRFSH, while WD_INH allows hardware inhibition of reset. All external outputs feature short-to-battery and overcurrent protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | S12P 16-bit HCS12 derivative with COP watchdog, IPLL clock generation, and ECC-protected flash |
| Flash Memory | 128 KB - enables full engine calibration tables, diagnostic routines, and bootloader space in single-die MCU |
| RAM | 6 KB - supports real-time control buffers, PID computation, and CAN message queues |
| Supply Range | 4.7 V to 36 V - accommodates cold-crank (≥4.7 V) and load-dump (≤36 V) conditions in 12 V automotive systems |
| Injector Driver | 4.0 A typical current limit - drives standard high-impedance fuel injectors without external MOSFETs |
| Lamp Driver | 1.5 A typical current limit - directly powers MIL lamps or LED arrays without series resistors |
| Ignition Pre-Driver | High-side (IGNOUTH) and low-side (IGNOUTL) outputs - supports external IGBT or Darlington transistor for coil control |
| Communication | ISO-9141 K-Line interface - enables standardized OBD-II diagnostics using MRX/MTX bidirectional logic-level signals |
Pinout & Package
MM912JP812AMAF is housed in a 100-pin LQFP-EP (Leadless Quad Flat Package with Exposed Pad) measuring 14 mm × 14 mm × 1.4 mm, with thermal pad (EP) connected to substrate ground for enhanced power dissipation in engine bay environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 7–8, 11, 13, 15, 18–20, 25 | Unused (N.C.) | Must remain unconnected; no internal connection or pull-up/down |
| 3 (MTX), 4 (MRX) | ISO-9141 data interface | Logic-level TX/RX between MCU SCI and analog K-Line transceiver; requires connection to MCU pins 90/89 |
| 5 (WDRFSH), 21 (WD_INH) | Watchdog control | WDRFSH must be toggled periodically by MCU to prevent reset; WD_INH tied low to enable reset on timeout |
| 9 (ROUT), 12 (LAMPOUT), 17 (INJOUT) | Low-side power drivers | Directly switch relay coils, MIL lamps, and fuel injectors; each includes short-to-battery and overcurrent protection |
| 26 (IGNOUTL), 27 (IGNOUTH), 28 (IGNSUP) | Ignition pre-driver outputs | IGNOUTL (low-side) and IGNOUTH (high-side) drive external IGBT base/gate; IGNSUP selects supply rail (VPWR or +5 V) |
| 93 (RESET), 94–96 (INJFLT/RELFLT/IGNFLT) | Fault and reset signaling | RESET output from analog die resets MCU on under-voltage or watchdog timeout; fault pins report open/short faults per channel |
| 97–100 (INJIN, RIN, LAMPIN, IGNIN) | Parallel control inputs | CMOS-level digital inputs from MCU that directly enable corresponding analog outputs; no protocol overhead or timing constraints |
| EP | Substrate ground | Exposed thermal pad; must be soldered to PCB ground plane for thermal management and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated SiP architecture | Combines S12P MCU and MC33812 analog driver in single 100-pin LQFP-EP package-reduces PCB area and inter-die routing complexity vs. discrete solutions |
| Wide input voltage operation | 4.7 V to 36 V VPWR range supports full automotive battery transient profile including cold crank and load dump without external regulators |
| Dual-domain fault reporting | Separate INJFLT, RELFLT, and IGNFLT outputs provide immediate, isolated fault detection for each power channel-enables rapid diagnostic response and safe shutdown |
| ISO-9141 K-Line compliance | On-chip K-Line transceiver with ratiometric VPWR-level input threshold and open-drain output eliminates need for external level-shifting components |
| Pre-regulated +5.0 V supply | VCCREF and VCCSENS pins configure external PNP pass transistor to deliver stable +5.0 V for MCU core-reduces dependency on board-level regulators |
| EMC-optimized clocking | Frequency-modulated IPLL reduces electromagnetic emissions during high-speed MCU operation-meets stringent automotive radiated emission requirements |
Applications
| Motorcycle Engine Control Unit (ECU) | Small Engine Generator Control |
|---|---|
Use Scenario: Real-time spark timing, fuel injection pulse width, and idle speed control in air-cooled 1–2 cylinder motorcycle engines. IC Role / Device Role / Timing Role: Primary system-on-package controller executing closed-loop combustion control algorithms and managing all actuator outputs. Use Value: Eliminates separate MCU and driver ICs-reducing BOM count, layout area, and interconnect noise in compact motorcycle ECU designs. | Use Scenario: Voltage regulation, load switching, and fault monitoring in portable gasoline-powered generators used for backup or remote power. IC Role / Device Role / Timing Role: Central control unit coordinating generator startup sequence, AC output regulation, and overload protection. Use Value: Integrated relay and lamp drivers simplify control of starter solenoids and status indicators; wide VPWR range ensures reliable operation across varying alternator output profiles. |
| Marine Outboard Motor Control | Industrial Pump Controller |
Use Scenario: Throttle-by-wire, knock detection, and emissions control in 2-stroke/4-stroke marine outboard engines operating in corrosive saltwater environments. IC Role / Device Role / Timing Role: Safety-critical engine management unit with ISO-9141 diagnostics for serviceability and regulatory compliance. Use Value: Fault-reporting outputs (INJFLT/IGNFLT) enable immediate engine derating upon detected coil or injector failure-preventing catastrophic damage in marine applications. | Use Scenario: Duty-cycle control of fuel transfer pumps, pressure relief valves, and status LEDs in industrial hydraulic or chemical dosing systems. IC Role / Device Role / Timing Role: Embedded actuator interface IC translating microcontroller commands into robust high-current switching signals. Use Value: 4.0 A injector driver and 1.5 A lamp driver eliminate need for external driver transistors-reducing component count and improving reliability in sealed pump enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar engine control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MM912IP812AMAF | Same SiP architecture and MC33812 analog die, but S12P MCU with 96 KB flash instead of 128 KB | Reduced flash capacity limits calibration table depth and diagnostic log storage-suitable for simpler engine maps | Select when firmware size is ≤96 KB and cost sensitivity outweighs future calibration flexibility |
| MC9S12XEP100 + MC33812 (discrete) | Separate S12XEP100 MCU (1 MB flash, 64 KB RAM) and standalone MC33812 driver IC-no SiP integration | Enables higher-complexity engine calibrations and advanced diagnostics, but requires additional PCB area and interconnect routing | Select when development requires maximum flash headroom or when existing board design already uses discrete MC33812 |
Compared with MM912IP812AMAF, the MM912JP812AMAF provides 32 KB more flash for expanded calibration data and diagnostics; compared with discrete MC9S12XEP100+MC33812, it trades flash scalability for reduced board area, lower EMI, and simplified thermal design in space-constrained ECUs.
Availability
MM912JP812AMAF is available at Aetrix Electronics and suitable for motorcycle ECU design, small-engine generator control, and marine outboard motor applications requiring stable component supply and long-term automotive-grade availability.
Supply support for MM912JP812AMAF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The MM912xP812 product line was designed specifically for cost-sensitive, space-constrained small-engine electronic control units-integrating MCU, power drivers, and diagnostics into a single SiP to accelerate time-to-market for 1–2 cylinder applications.
FAQ
What is the primary function of the MM912JP812AMAF in an engine control system?
The MM912JP812AMAF serves as a complete System-in-Package (SiP) engine controller, integrating an S12P MCU with 128 KB flash and the MC33812 analog driver die. It executes real-time combustion control algorithms while directly driving fuel injectors, ignition coils (via pre-driver), warning lamps, and relays-eliminating the need for discrete driver ICs in motorcycle and small-engine ECU designs. The MM912JP812AMAF consolidates signal conditioning, power switching, and diagnostics into one device.
Does the MM912JP812AMAF support ISO-9141 diagnostics, and how is it implemented?
Yes, the MM912JP812AMAF includes native ISO-9141 K-Line interface functionality via its integrated MC33812 analog die. It uses dedicated pins MTX (input) and MRX (output) to connect to the MCU's SCI peripheral, and the ISO9141 bidirectional VPWR-level pin connects externally to the diagnostic tool. The MM912JP812AMAF handles level translation, bus arbitration, and protocol timing internally-requiring only minimal MCU firmware to implement UDS or KWP2000 services.
How does the MM912JP812AMAF handle fault detection for its power outputs?
The MM912JP812AMAF provides dedicated open-drain fault-reporting outputs: INJFLT for injector driver faults, RELFLT for relay driver faults, and IGNFLT for ignition pre-driver faults. Each pin asserts low upon detection of overcurrent, short-to-battery, open-load, or thermal shutdown. These signals connect directly to MCU GPIO pins, enabling immediate software response-such as disabling affected outputs or entering safe mode-without polling or complex communication protocols. This behavior is intrinsic to the MM912JP812AMAF's analog die architecture.
What is the role of the IGNOUTL and IGNOUTH pins on the MM912JP812AMAF?
IGNOUTL (pin 26) and IGNOUTH (pin 27) are complementary high-current outputs from the MM912JP812AMAF's ignition pre-driver circuit. IGNOUTL is a low-side driver, while IGNOUTH is a high-side driver; together they control the gate/base of an external IGBT or bipolar Darlington transistor used to switch the ignition coil primary winding. IGNSUP (pin 28) selects the supply rail-+5 V for Darlington bias or VPWR for IGBT gate drive-making the MM912JP812AMAF adaptable to different ignition topologies.
Can the MM912JP812AMAF operate across the full automotive battery voltage range, and what protections are included?
Yes, the MM912JP812AMAF operates from 4.7 V to 36 V VPWR, covering cold-crank (down to 4.7 V) and load-dump (up to 36 V) conditions typical in 12 V automotive systems. It includes built-in surge voltage protection recommendations (external TVS on VPWR), short-to-battery protection on all power outputs (ROUT, LAMPOUT, INJOUT), overcurrent limiting (4.0 A injector, 1.5 A lamp), and thermal shutdown. The MM912JP812AMAF also features under-voltage lockout and watchdog reset to ensure deterministic behavior during supply transients.
MM912JP812AMAF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 100-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Engine Control
- Core Processor:
- S12P
- Program Memory Type:
- FLASH (128kB)
- Controller Series:
- HCS12
- RAM Size:
- 6K x 8
- Interface:
- CAN, SCI, SPI
- Number of I/O:
- 8
- Voltage - Supply:
- 4.7V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP-EP (14x14)
MM912JP812AMAF FAQ
1.How can I place an order for MM912JP812AMAF through Aetrix?
Please submit a Request for Quotation (RFQ) for MM912JP812AMAF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MM912JP812AMAF reliable?
The price and inventory of MM912JP812AMAF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM912JP812AMAF is usually 5 days.
3.What payment methods are accepted for MM912JP812AMAF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM912JP812AMAF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM912JP812AMAF?
MM912JP812AMAF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM912JP812AMAF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MM912JP812AMAF?
For technical support, including MM912JP812AMAF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM912JP812AMAF requirements.
6.How does Aetrix verify that MM912JP812AMAF is sourced from the original manufacturer or authorized distributors?
All MM912JP812AMAF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM912JP812AMAF meets industry standards.
7.What is the process for return or replacement of MM912JP812AMAF?
All MM912JP812AMAF units undergo pre-shipment inspection (PSI). If there is an issue with MM912JP812AMAF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MM912JP812AMAF part is unused and in its original packaging.
Return procedure for MM912JP812AMAF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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