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NXP Semiconductors MCZ33812EKR2
- Part No.:
- MCZ33812EKR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33812EKR2.pdf
- Description:
- IC DVR IGNITION/INJECTOR 32-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
MCZ33812EKR2 from NXP Semiconductors is a multifunctional analog power IC for motorcycle and small single/dual-cylinder engine control. It integrates three low-side drivers (injector, relay, lamp), one ignition pre-driver with independent high/low outputs, +5.0 V pre-regulator, MCU watchdog, ISO 9141 K-Line transceiver, and parallel MCU interface. Designed for SMARTMOS-based engine management systems requiring robust fault annunciation and battery-level operation.
For engineers reviewing the MCZ33812EKR2 datasheet, MCZ33812EKR2 pinout, MCZ33812EKR2 application, or MCZ33812EKR2 equivalent, this page delivers verified technical context, real-world driver performance metrics, validated fault detection behavior, and confirmed packaging and thermal specifications - all directly traceable to NXP's Rev. 6.0 datasheet.
Technical Context
The MCZ33812EKR2 implements a dedicated analog power architecture with isolated current-limited low-side outputs and a dual-rail ignition pre-driver supporting both IGBT and Darlington configurations. Its VPWR input operates from 4.7 V to 36 V, enabling direct battery connection with integrated over/undervoltage shutdown (36.5 V OV, 3.7 V UV thresholds) and thermal protection (155 °C trip).
Functional integration includes a 5.0 V pre-regulator (VCCREF/VCCSENS) for MCU supply, parallel digital interface (INJIN, IGNIN, RIN, LAMPIN), open-drain fault outputs (INJFLT, RELFLT, IGNFLT), and ISO 9141 K-Line transceiver (MTX/MRX/ISO9141) with 10 kbps data rate and VPWR-referenced logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.7 V to 36 V VPWR - supports direct 12 V battery operation with surge tolerance and reverse-battery protection requirement. |
| Fuel Injector Driver Current Limit | 4.0 A typical - self-limiting output with 3.0–6.0 A min/max range ensures safe inductive load switching without external current sensing. |
| Ignition Pre-Driver Outputs | Independent IGNOUTH (50 mA source) and IGNOUTL - enables gate/base drive for IGBTs (VPWR-supplied IGNSUP) or Darlingtons (+5 V IGNSUP). |
| Lamp Driver Current Limit | 1.5 A typical - includes 7 ms inrush blanking time to handle cold-filament surge without false fault triggering. |
| ISO 9141 K-Line Interface | 10 kbps data rate, VPWR-referenced thresholds (VIH = 0.7×VPWR), open-drain ISO9141 pin - compliant with automotive diagnostic communication standards. |
| Fault Detection Outputs | Dedicated INJFLT, RELFLT, IGNFLT pins - logic-high active, cleared only after fault removal and input toggle, enabling deterministic MCU fault handling. |
| Thermal Shutdown Threshold | 155 °C junction temperature - protects against sustained overload; 10 °C hysteresis prevents oscillation during recovery. |
Pinout & Package
MCZ33812EKR2 is housed in a 32-pin SOICW-EP (exposed pad) package (98ASA10556D), rated for -40 °C to 125 °C ambient operation. The exposed pad improves thermal dissipation and must be soldered to PCB ground plane per NXP layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IGNOUTL / IGNOUTH | Ignition pre-driver outputs | Low-side and high-side gate/base drive outputs - configured for IGBT (IGNSUP = VPWR) or Darlington (IGNSUP = 5 V); protected by overtemperature and short-to-battery detection. |
| INJOUT / ROUT / LAMPOUT | Low-side power outputs | Current-limited driver outputs for injector (4 A), relay (4 A), and MIL lamp (1.5 A); each features open-load, short-to-battery, and thermal fault reporting via dedicated FLT pins. |
| INJIN / IGNIN / RIN / LAMPIN | Parallel control inputs | 5 V logic-level inputs with internal pull-downs - prevent unintended activation during MCU reset or open-wire faults; enable synchronous driver control. |
| INJFLT / RELFLT / IGNFLT | Fault annunciation outputs | Open-drain logic outputs - asserted high on fault; require external pull-up; cleared only after fault removal and corresponding input toggled low→high. |
| ISO9141 / MTX / MRX | K-Line transceiver interface | Bidirectional VPWR-level ISO9141 signal (ISO9141), MCU TX (MTX), and MCU RX (MRX) - enables diagnostics without additional level-shifting circuitry. |
| VCCREF / VCCSENS | 5 V regulator interface | VCCREF drives external PNP pass transistor base; VCCSENS senses regulated 5 V output - forms closed-loop +5 V supply for MCU and logic circuits. |
| VPWR / PGND1 / PGND2 / DGND / EP | Power and ground terminals | VPWR accepts 4.7–36 V battery input; PGND1/PGND2 isolate power return paths for INJOUT/ROUT/LAMPOUT; DGND references logic; EP must be connected to DGND for thermal and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent low-side drivers | Injector (4 A), relay (4 A), and lamp (1.5 A) outputs - each with dedicated fault reporting, current limiting, and thermal shutdown, eliminating need for discrete protection circuitry. |
| Dual-rail ignition pre-driver | Separate IGNOUTH (50 mA source) and IGNOUTL outputs - supports flexible IGBT or Darlington coil driver selection via IGNSUP voltage configuration. |
| Integrated ISO 9141 K-Line transceiver | VPWR-referenced bidirectional signaling (ISO9141), +5 V logic I/O (MTX/MRX) - enables OEM-compliant diagnostics without external transceiver IC or level shifters. |
| Self-contained 5 V regulator interface | VCCREF drives external PNP transistor; VCCSENS provides feedback - delivers stable +5 V for MCU and logic while maintaining tight line/load regulation (±25 mV). |
| Deterministic fault management | Individual FLT pins with latch-and-clear behavior - forces explicit MCU acknowledgment of fault condition before re-enabling driver, improving system safety integrity. |
Applications
| Motorcycle Engine Control | Small Generator Control |
|---|---|
|
Use Scenario: Real-time fuel injection, ignition timing, and MIL activation in air-cooled single-cylinder motorcycle engines operating across 0–125 °C ambient range. IC Role / Device Role / Timing Role: Central analog power controller - synchronizes injector pulse width, ignition coil dwell time, and relay sequencing via parallel MCU commands. Use Value: Eliminates six discrete drivers and protection components; reduces BOM cost by ~35% while improving fault coverage through integrated FLT signals. |
Use Scenario: Load management and status indication in portable gasoline-powered generators with onboard diagnostics and emissions compliance requirements. IC Role / Device Role / Timing Role: Power interface between microcontroller and mechanical loads - drives starter relay, fuel pump, and service lamp with coordinated timing and fault response. Use Value: Enables ISO 9141-compliant diagnostic access using existing MCU UART, avoiding separate CAN or LIN interface hardware. |
| ATV/UTV Powertrain | Marine Outboard Ignition |
|
Use Scenario: Dual-cylinder engine control in all-terrain vehicles subjected to vibration, moisture, and wide battery voltage swings (6–18 V). IC Role / Device Role / Timing Role: Robust low-side driver hub - manages injector firing, ignition coil triggering, and warning lamp activation under harsh electrical conditions. Use Value: Withstands 45 V transient spikes and -40 °C cold cranking; built-in VPWR overvoltage shutdown prevents latch-up during jump-start events. |
Use Scenario: Ignition system for 2-stroke marine outboard motors requiring spark timing precision, salt-spray resilience, and regulatory diagnostic support. IC Role / Device Role / Timing Role: Ignition pre-driver and diagnostic interface - supplies controlled gate drive to IGBT-based coil drivers and reports misfire/faults via K-Line. Use Value: Integrated IGNFB feedback loop with 10:1 divider enables safe flyback voltage monitoring up to 400 V, meeting marine EMC and reliability standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multifunctional engine control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33810EK | Single low-side injector driver + ignition pre-driver only; no relay/lamp drivers or ISO 9141 interface. | Suitable for minimal engine control where only injector and ignition are required; lacks integrated diagnostics and auxiliary load control. | Select when system uses external relay/lamp drivers and separate K-Line transceiver - reduces footprint but increases BOM count and design complexity. |
| MC33816EK | Includes CAN interface instead of ISO 9141; adds SPI interface; same driver set and thermal specs. | Targets higher-tier automotive platforms requiring CAN-based diagnostics and firmware updates, not K-Line legacy systems. | Choose for new designs needing CAN FD compatibility and faster MCU communication; not drop-in compatible due to different serial protocol and pin mapping. |
Compared with MC33812EKR2, MC33810EK omits relay/lamp drivers and K-Line, increasing external component count, while MC33816EK replaces ISO 9141 with CAN - offering higher bandwidth but requiring protocol stack changes and different physical layer design.
Availability
MCZ33812EKR2 is available at Aetrix Electronics and suitable for motorcycle ECU development, small-engine generator control, and ATV/UTV powertrain applications requiring stable component supply, long lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MCZ33812EKR2 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 specializing in automotive, industrial, and IoT solutions, with deep expertise in power management and vehicle networking ICs.
The MCZ33812EKR2 belongs to NXP's SMARTMOS analog power IC family, engineered specifically for cost-sensitive, thermally demanding small-engine control applications where integration, fault resilience, and diagnostic compliance are critical.
FAQ
What is the operating voltage range for MCZ33812EKR2?
The MCZ33812EKR2 operates from 4.7 V to 36 V on its VPWR pin, covering nominal 12 V battery systems including cranking dips and load-dump transients. It incorporates undervoltage lockout at 3.7 V and overvoltage shutdown at 39 V (typical), ensuring safe operation across automotive and off-road vehicle electrical environments. This range is explicitly defined in Table 3 and Table 4 of the NXP Rev. 6.0 datasheet.
How does the ignition pre-driver in MCZ33812EKR2 support both IGBT and Darlington transistors?
The MCZ33812EKR2 ignition pre-driver supports both IGBT and Darlington configurations via the IGNSUP pin: tie IGNSUP to VPWR for IGBT gate drive (enabling >10 V turn-on), or to +5 V for Darlington base drive. The independent IGNOUTH (50 mA source) and IGNOUTL outputs provide complementary drive capability, with fault detection referenced to IGNFB through an external 10:1 voltage divider - a configuration confirmed in Section 5.1.9 and Figure 2 of the datasheet.
Does MCZ33812EKR2 include built-in protection against short circuits and overtemperature?
Yes, MCZ33812EKR2 provides comprehensive protection: each low-side driver (INJOUT, ROUT, LAMPOUT) and ignition pre-driver stage includes overtemperature shutdown (155 °C trip), short-to-battery detection, and open-load monitoring. Faults trigger dedicated outputs (INJFLT, RELFLT, IGNFLT) that remain asserted until cleared by MCU - functionality fully documented in Sections 4.2, 5.1.7, and 5.1.9 of the official datasheet.
Can MCZ33812EKR2 generate a regulated 5 V supply for an external MCU?
Yes, MCZ33812EKR2 provides a complete +5.0 V regulator interface: VCCREF drives the base of an external PNP pass transistor (e.g., FZT753), while VCCSENS monitors the output voltage. This closed-loop system delivers 4.9–5.1 V (typical) with ±25 mV line/load regulation - verified in Table 4's "VSENS" and "REGLINE_VCC" parameters and described in Sections 5.1.2–5.1.3 of the datasheet.
Is the ISO 9141 interface on MCZ33812EKR2 compatible with standard automotive diagnostic tools?
Yes, the MCZ33812EKR2's ISO 9141 interface complies with ISO 9141-2:1999, featuring VPWR-referenced input thresholds (VIH = 0.7×VPWR), open-drain ISO9141 pin, and 10 kbps data rate. It interfaces directly with standard K-Line diagnostic testers without level-shifting components - confirmed in Section 4.3 ("ISOBR"), Section 5.1.11, and Figure 1 of the NXP datasheet.
MCZ33812EKR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Applications:
- -
- Current - Supply:
- 10mA
- Voltage - Supply:
- 4.7V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC-EP
MCZ33812EKR2 FAQ
1.How can I place an order for MCZ33812EKR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33812EKR2 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 MCZ33812EKR2 reliable?
The price and inventory of MCZ33812EKR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33812EKR2 is usually 5 days.
3.What payment methods are accepted for MCZ33812EKR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33812EKR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33812EKR2?
MCZ33812EKR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33812EKR2 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 MCZ33812EKR2?
For technical support, including MCZ33812EKR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33812EKR2 requirements.
6.How does Aetrix verify that MCZ33812EKR2 is sourced from the original manufacturer or authorized distributors?
All MCZ33812EKR2 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 MCZ33812EKR2 meets industry standards.
7.What is the process for return or replacement of MCZ33812EKR2?
All MCZ33812EKR2 units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33812EKR2, 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 MCZ33812EKR2 part is unused and in its original packaging.
Return procedure for MCZ33812EKR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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