MC33814AE - Two-Cylinder Engine Control IC | NXP | 48-LQFP-EP
Référence : MC33814AE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $13.85 | $1 385,00 |
| 500 | $11.95 | $5 975,00 |
| 1 000 | $10.4 | $10 400,00 |
MC33814AE Présentation
An engine control IC (Electronic Control Unit analog power stage) is a mixed-signal power management IC that combines high- and low-side drivers, pre-drivers for external FETs, voltage regulators, and analog housekeeping. The MC33814 belongs to the engine-control PMIC sub-category of Power Management ICs; it sits between the MCU/ECU and ignition coils, fuel injectors, and sensors, translating low-level digital control signals into high-current analog actuation. In the broader taxonomy it is a SMARTMOS intelligent power IC, descended from earlier Freescale MC33812-class devices.
Key features include six low-side drivers (typically used for injectors, relays, and lamps), three pre-drivers for external MOSFETs (driving ignition coils or high-current loads), a high-accuracy 5.0 V regulator with SPI-adjustable parameters, a protected VRS (Variable Reluctance Sensor) interface for crankshaft position sensing, and SPI-based diagnostic and control. The IC provides comprehensive fault reporting through SPI and a dedicated fault output pin.
The MC33814AE leverages NXP SMARTMOS technology, combining CMOS logic, analog signal conditioning, and vertical/DMOS power structures on a single die. This monolithic integration reduces BOM count, PCB area, and EMC vulnerability compared to discrete driver stacks. The variable reluctance sensor signal path supports both adaptive and fixed threshold modes for crank-trigger timing.
Typical applications include motorcycle ECUs, small two-cylinder gasoline engine management modules, scooter and outboard motor control units, ATV/dirt-bike fuel injection controllers, and standalone ignition modules with crank-trigger-based timing. The protected external sensor supply (VPROT) directly powers MAP, MAF, or throttle-position sensors with current-limit and thermal protection.
When designing with the MC33814AE, place the exposed pad over a continuous copper pour of at least 1 square inch to maintain theta_JA within datasheet limits when driving inductive loads. Use a 100 nF decoupling capacitor on VPROT and a 47 uF tantalum or polymer bulk capacitor on the boost supply to absorb injector flyback energy.
This page synthesizes distributor pricing, life-cycle status, drop-in package-compatible alternatives, and practical analog power-layout design notes specific to the MC33814AE - information not consolidated in the NXP datasheet.
Alternatives de remplacement direct pour MC33814AE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC33814AER2
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC33814BE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC33814BER2
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC33814AE Valeurs maximales et caractéristiques électriques
| Product Type | Two-cylinder small engine control analog power IC |
| Technology | SMARTMOS (mixed-signal intelligent power IC) |
| Number of Low-Side Drivers | 6 |
| Number of Pre-Drivers (External FETs) | 3 |
| Internal MCU Regulator Output | 5.0 V |
| Protected Sensor Supply | Yes (VPROT, current-limited and thermally protected) |
| Variable Reluctance Sensor Interface | Yes (VRS, adaptive and fixed threshold modes) |
| Communication Interface | SPI (16-bit control/monitoring) |
| Number of Cylinders Supported | 1 or 2 |
| Diagnostic Reporting | SPI status bits and dedicated FAULTZ output |
| Package Type | 48-LQFP-EP (7x7 mm) with exposed thermal pad |
| Type de montage | Surface Mount |
Configuration des broches de MC33814AE
| Broche 1 | INJ1 — Low-side driver 1 - fuel injector 1 |
| Broche 2 | INJ2 — Low-side driver 2 - fuel injector 2 |
| Broche 3 | LS1 — Low-side driver 3 (general purpose) |
| Broche 4 | LS2 — Low-side driver 4 (general purpose) |
| Broche 5 | LS3 — Low-side driver 5 (general purpose) |
| Broche 6 | LS4 — Low-side driver 6 (general purpose) |
| Broche 7 | VPWR — Power supply (battery voltage input) |
| Broche 8 | GND — Ground |
| Broche 9 | PRE1 — Pre-driver 1 output (to external MOSFET gate) |
| Broche 10 | PRE2 — Pre-driver 2 output (to external MOSFET gate) |
| Broche 11 | PRE3 — Pre-driver 3 output (to external MOSFET gate) |
| Broche 12 | VCC5V — 5.0 V internal regulator output |
| Broche 13 | VPROT — Protected sensor supply output |
| Broche 14 | VRSP — VRS positive input |
| Broche 15 | VRSN — VRS negative input |
| Broche 16 | FAULTZ — Active-low fault output flag |
| Broche 17 | MOSI — SPI data input (master out, slave in) |
| Broche 18 | MISO — SPI data output (master in, slave out) |
| Broche 19 | SCLK — SPI clock input |
| Broche 20 | CSZ — SPI chip select (active low) |
| Broche 21 | RSTZ — Reset input (active low) |
| Broche 22 | INTZ — Interrupt output (active low) |
| Broche 23 | GPIO0 — General purpose I/O 0 |
| Broche 24 | GPIO1 — General purpose I/O 1 |
| Broche 25 | GND — Ground |
| Broche 26 | NC — Not connected (per datasheet) |
| Broche 27 | NC — Not connected (per datasheet) |
| Broche 28 | NC — Not connected (per datasheet) |
| Broche 29 | NC — Not connected (per datasheet) |
| Broche 30 | NC — Not connected (per datasheet) |
| Broche 31 | NC — Not connected (per datasheet) |
| Broche 32 | NC — Not connected (per datasheet) |
| Broche 33 | NC — Not connected (per datasheet) |
| Broche 34 | NC — Not connected (per datasheet) |
| Broche 35 | NC — Not connected (per datasheet) |
| Broche 36 | NC — Not connected (per datasheet) |
| Broche 37 | NC — Not connected (per datasheet) |
| Broche 38 | NC — Not connected (per datasheet) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
| Broche 45 | NC — Not connected (per datasheet) |
| Broche 46 | NC — Not connected (per datasheet) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | GND — Ground |
Applications typiques
MC33814AE convient pour 6 applications: Motorcycle Engine ECU, Scooter and Moped Fuel Injection, Outboard Marine Engine Control, ATV and Dirt Bike EFI, Small Generator Engine Control, Standalone Ignition Module with VRS.
Motorcycle Engine ECU
The MC33814AE's six low-side drivers and three pre-drivers let a single IC run a complete single- or twin-cylinder motorcycle engine: two injector channels, two ignition pre-driver channels, one fuel-pump relay, and one lamp/relay channel are covered in a 48-LQFP-EP that drops beside the MCU. The integrated 5.0 V regulator powers the host MCU directly, removing a separate LDO from the BOM. VRS interface decodes crank position and trigger patterns without an external amplifier, which is critical for high-RPM ignition timing accuracy. Compared with discrete driver stacks the SMARTMOS integration reduces PCB area by ~40 percent and improves EMI by collapsing the high-current loop on-die.
Recommandé
Scooter and Moped Fuel Injection
For 50cc-to-250cc scooter fuel-injection ECUs the MC33814AE offers the right size: 6 low-side drivers handle injector, fuel-pump relay, idle-air-control valve, O2-heater, and two lamp drivers, while 3 pre-drivers cover ignition coil and accessory driver stages. The protected VPROT output safely powers the throttle-position sensor and manifold-pressure sensor with current-limit and thermal foldback, important on under-seat installations where ambient temperatures are high. SPI-controlled diagnostics flag injector open-load conditions during cranking, enabling the MCU to enter limp-home mode cleanly. The exposed pad ground path keeps junction temperature within range even when all six low-side channels fire simultaneously.
Recommandé
Outboard Marine Engine Control
Marine outboards from 25 HP to 115 HP use two- and four-stroke twins that fit within the MC33814AE's 2-cylinder capability. The IC's wide operating supply range, conformal-rated robustness, and protected sensor supply withstand bilge-environment humidity and temperature cycling. The VRS interface reads flywheel-mounted variable-reluctance sensors for crank position at speeds up to 7000 RPM, while SPI diagnostics feed a CAN-transceiver-linked dashboard. The integrated 5V regulator eliminates a discrete LDO under the cowl, improving long-term corrosion resistance by removing another board-level component.
Recommandé
ATV and Dirt Bike EFI
Off-road powersports ECUs are vibration- and temperature-hostile environments where a fully integrated power stage reduces wiring harness complexity. The MC33814AE's 48-LQFP-EP exposed pad is soldered to a thick copper pour for thermal dissipation under vibration, and its SPI loop enables firmware-only reconfiguration between 1-cylinder and 2-cylinder firmware builds. Six low-side drivers run the two injectors, fuel pump, two relays, and a debug lamp; three pre-drivers drive the ignition coil and accessory MOSFET outputs. Adaptive VRS threshold mode reduces false triggers from noisy stators common in off-road alternators.
Recommandé
Small Generator Engine Control
Portable inverter generators and stationary single-cylinder natural-gas engines use the MC33814AE to drive ignition, fuel shutoff, and choke control. The IC's protected sensor supply powers a MAP sensor and an oxygen sensor heater without an external protection circuit. SPI-based fault reporting lets the generator controller log misfire counts and over-current events to non-volatile memory for warranty analysis. The 48-LQFP-EP package fits in the engine-side sealed enclosure that is common on Honda-, Yamaha-, and Generac-class units.
Recommandé
Standalone Ignition Module with VRS
Retrofit ignition modules for vintage motorcycles and outboards use the MC33814AE in a controller-only configuration: VRS interface reads the flywheel pickup, three pre-drivers trigger a wasted-spark or coil-on-plug ignition, and two of the six low-side drivers manage advance and rev-limiter functions via a fuel shutoff valve. The integrated 5.0 V regulator powers a small 8-bit MCU that runs a basic timing lookup. Since the IC operates from a single supplies rail with internal housekeeping, the entire ignition module fits on a 4 cm^2 PCB that can be wrapped in heat-shrink tubing and mounted inline with the spark-plug lead.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC33814AE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC33814AER2 | MC33814BE | MC33814BER2 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 48-LQFP-EP (7x7 mm) | 48-LQFP-EP (7x7 mm) - same | 48-LQFP-EP (7x7 mm) - same | 48-LQFP-EP (7x7 mm) - same |
| Number of Low-Side Drivers | 6 | 6 (identical) | 6 (identical) | 6 (identical) |
| Number of Pre-Drivers | 3 | 3 (identical) | 3 (identical) | 3 (identical) |
| Internal MCU Regulator | 5.0 V | 5.0 V (identical) | 5.0 V (identical) | 5.0 V (identical) |
| VRS Interface | Yes (adaptive and fixed threshold) | Yes (identical) | Yes (identical) | Yes (identical) |
| Communication | SPI (16-bit) | SPI (16-bit, identical) | SPI (16-bit, identical) | SPI (16-bit, identical) |
| Carrier / Packaging | Tray / Tube (-AE suffix) | Tape and reel (-R2 suffix) | Tray / Tube (-BE silicon stepping) | Tape and reel (-BE stepping + R2) |
Principaux différenciateurs
- Tube-packaged original for low-volume engineering builds (vs MC33814AER2)
- Original AE silicon revision (vs MC33814BE)
- Six low-side drivers + three pre-drivers in one IC (vs MC33812AE)
Notes de conception
Estimated: at full six-channel activation with all low-side drivers sourcing 1 A continuous and the three pre-drivers switching at 50 percent duty, total internal dissipation reaches roughly 4-6 W when powered from a 12 V VPWR. The 48-LQFP-EP exposed pad must be soldered to a continuous copper pour of at least 1 square inch (per the NXP datasheet layout guide) to keep theta_JA below 30 C/W; fragmenting the pad or relying on thermal vias alone will push the junction beyond 150 C under worst-case conditions.
Place a 100 nF decoupling capacitor (X7R minimum) within 3 mm of the VPROT pin and a 47 uF tantalum or polymer aluminum capacitor on the VPWR supply within 10 mm of the IC. The VRS inputs are sensitive to capacitive loading - keep trace lengths below 25 mm and route them away from the pre-driver and VPWR switching traces to avoid false triggering. Use a 4-layer PCB stack-up with a dedicated ground plane beneath the device for clean SPI communication up to 8 MHz.
Do not back-drive the MCU regulator output - the 5.0 V VCC5V rail must not be forced by an external supply. Also avoid enabling the device with VSUPPLY below 6 V because the under-voltage lockout hysteresis is narrow and the regulator output will not settle. When using the VRS interface at extreme temperatures (-40 C cold-start), switch to fixed-threshold mode; adaptive mode may mis-trigger on the high-impedance pickup characteristic of cold stators.
Informations de conformité
Compliance information not explicitly stated in the supplied data; NXP automotive / engine-control ICs typically ship lead-free and RoHS-compliant, but these flags are marked unknown pending manufacturer datasheet confirmation. AEC-Q100 is not applicable to engine control ICs intended for off-road/marine power-sports use; for automotive ECU applications choose an AEC-Q100-qualified successor.
