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NXP Semiconductors MCZ33991EG
- Part No.:
- MCZ33991EG
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MCZ33991EG.pdf
- Description:
- IC MTR DRV BIPLR 4.5-5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
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Product details
Overview
MCZ33991EG from Freescale Semiconductor is a Pb-free, 24-pin SOICW-packaged, SPI-controlled dual stepper motor gauge driver IC for automotive instrumentation. It integrates four dual-output H-bridge drivers, delivers 4096 steady-state pointer positions, supports 340° maximum sweep and 400°/s maximum pointer velocity, and emulates air-core movement with analog microstepping (12 steps/degree) in two-phase stepper motors.
For engineers reviewing the MCZ33991EG datasheet, MCZ33991EG pinout, MCZ33991EG application, or MCZ33991EG equivalent, this page provides verified technical context, confirmed pin functions, real-world automotive gauge use cases, and validated alternative options for instrument cluster design and stepper motor migration projects.
Technical Context
The MCZ33991EG implements a fully integrated state machine for pointer position, velocity, and acceleration control-using a ROM-based microstep timing table synchronized to its calibratable internal oscillator. Its dual H-bridge pairs (SIN0±/COS0± and SIN1±/COS1±) operate in four-quadrant linear mode to drive two independent two-phase stepper motors.
Control is exclusively via 16-bit SPI commands (CS/SCLK/SI/SO), with status feedback returned MSB-first on SO. Clock calibration uses an 8 µs pulse on CS, enabling ±10% accuracy; uncalibrated tolerance is +70%/−35%. Overvoltage (26–38 V) and undervoltage (5.0–6.2 V) detection protect VPWR operation across 6.5–26.0 V battery range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual independent two-phase stepper motor drivers with four H-bridges (SIN0±/COS0±, SIN1±/COS1±) |
| Pointer Resolution | 4096 discrete steady-state positions (12 microsteps per degree over 340° sweep) |
| Max Pointer Velocity | 400°/s - enables rapid needle sweeps in speedometer or tachometer applications |
| Internal Clock Accuracy | ±10% after software calibration using 8 µs CS pulse; uncalibrated: +70%/−35% |
| VPWR Operating Range | 6.5 V to 26.0 V - supports 12 V automotive battery systems with load dump tolerance |
| SPI Interface Speed | 1.0–3.0 MHz - compatible with standard MCU SPI peripherals without custom timing logic |
| Thermal Shutdown | 155°C activation with 8–16°C hysteresis - protects against coil driver thermal runaway |
Pinout & Package
MCZ33991EG is housed in a 24-pin SOICW (wide-body) package with exposed thermal pad, rated for −40°C to +125°C ambient operation and θJA = 60°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 21–24 | H-Bridge Outputs | SIN0±/COS0± and SIN1±/COS1± - linearly drive stepper motor coils in four-quadrant mode for precise torque and direction control |
| 5–8, 17–20 | GND | Eight dedicated ground pins - provide low-impedance return paths for logic and power stages, and enhance thermal dissipation |
| 9 | CS | Chip Select - enables SPI communication and serves as calibration trigger input for internal oscillator |
| 10 | SCLK | Serial Clock - synchronous bit clock for 16-bit SPI transfers; requires CMOS-level 50% duty cycle |
| 11 | SO | Serial Output - tri-stateable status/data output (MSB-first), active only when CS = low |
| 12 | SI | Serial Input - accepts 16-bit command words on SCLK falling edge; internal pull-down |
| 13 | RTZ | Return-to-Zero Multiplexed Output - indicates non-driven coil state during RTZ event |
| 14 | VDD | Logic Supply - 4.5–5.5 V regulated input powering SPI interface and internal logic |
| 15 | RST | Reset - forces internal registers to default state; internal pull-up |
| 16 | VPWR | Battery Input - primary power source for H-bridge drivers; monitored for over/under-voltage faults |
Key Features
| Feature | Design Value |
|---|---|
| MMT-licensed two-phase stepper compatibility | Direct support for licensed AFIC 6405-style motors - eliminates need for external motion profile generation |
| Fully integrated pointer state machine | Hardware-accelerated position, velocity, and acceleration control - reduces MCU bandwidth usage by >90% vs. software-driven microstepping |
| Analog microstepping (12 steps/degree) | Smooth, jitter-free pointer motion with no audible stepping noise - critical for premium automotive instrument clusters |
| Calibratable internal oscillator | Software-tuned ±10% clock accuracy - ensures consistent pointer timing across temperature without external crystal |
| Air core movement emulation | ROM-based acceleration/deceleration profiles replicate analog meter inertia - improves user perception of responsiveness |
| Pb-free EG suffix packaging | RoHS-compliant 24-pin SOICW - meets automotive ELV and global environmental compliance requirements |
Applications
| Automotive Speedometer | Automotive Tachometer |
|---|---|
Use Scenario: Real-time vehicle speed display in digital instrument clusters using stepper-driven analog needles. IC Role / Device Role / Timing Role: MCZ33991EG directly controls two-phase stepper motor coil currents to position needle with calibrated velocity and acceleration profiles. Use Value: Enables smooth, high-fidelity needle sweeps up to 400°/s while maintaining 4096-position resolution - matching OEM visual expectations without MCU intervention. | Use Scenario: Engine RPM indication with dynamic response to throttle transients in gasoline/diesel vehicles. IC Role / Device Role / Timing Role: MCZ33991EG executes pre-programmed acceleration/deceleration curves based on incoming SPI velocity commands from ECU. Use Value: Delivers deterministic pointer motion with <1.0 ms coil turn-on/off delay - eliminating lag between engine event and visual feedback. |
| Automotive Fuel Gauge | Automotive Temperature Gauge |
Use Scenario: Low-bandwidth, high-accuracy fuel level indication using resistive sender input processed by MCU and relayed to gauge. IC Role / Device Role / Timing Role: MCZ33991EG receives target position commands via SPI and autonomously moves needle to requested 4096-step location. Use Value: Provides stable, drift-free positioning with built-in zero-return and calibration - eliminating mechanical potentiometer wear and thermal drift errors. | Use Scenario: Coolant or oil temperature monitoring where slow ramping and thermal hysteresis must be visually represented. IC Role / Device Role / Timing Role: MCZ33991EG interprets temperature-derived position commands and applies linear microstepping to emulate analog thermal rise/fall behavior. Use Value: Achieves 12-step-per-degree analog microstepping - rendering gradual temperature changes with natural visual continuity, not discrete jumps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gauge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33811AE | Single-channel gauge driver; lacks dual-motor capability and 4096-position resolution (max 1024) | Only suitable for single-gauge clusters or cost-sensitive entry-tier designs | Select only when second gauge is unnecessary and board space is constrained |
| NCP5422DR2G | Two-channel H-bridge driver without integrated motion control - requires full external microstepping firmware | Demands significant MCU resources for position/velocity profiling and fault handling | Choose only if custom motion algorithms or non-standard motor types are required |
Compared with MCZ33991EG, MC33811AE reduces integration but sacrifices dual-gauge flexibility and resolution, while NCP5422DR2G shifts all motion intelligence to the host MCU - increasing development time and validation scope for automotive-grade pointer behavior.
Availability
MCZ33991EG is available at Aetrix Electronics and suitable for automotive instrument clusters, dashboard control modules, and electronic gauge replacement programs requiring stable component supply, long lifecycle support, and AEC-Q100-aligned performance.
Supply support for MCZ33991EG 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in automotive, industrial, and networking solutions with deep expertise in mixed-signal analog and embedded control ICs.
The MCZ33991EG belongs to Freescale's automotive gauge driver product line, designed specifically to replace air-core meters with stepper-based instrumentation while minimizing MCU overhead and ensuring seamless visual fidelity in vehicle dashboards.
FAQ
What is the primary function of the MCZ33991EG in automotive instrument clusters?
The MCZ33991EG serves as a dedicated dual stepper motor gauge driver IC that replaces traditional air-core meters. It autonomously controls two independent two-phase stepper motors using integrated H-bridges, position/velocity state machines, and analog microstepping - enabling smooth, high-resolution needle movement without continuous MCU intervention. Its design purpose is to simplify dashboard electronics while preserving OEM visual quality standards.
Does the MCZ33991EG require an external crystal or resonator for timing?
No, the MCZ33991EG does not require an external crystal or resonator. It features a calibratable internal oscillator that achieves ±10% accuracy after software calibration using an 8 µs pulse on the CS pin. The uncalibrated tolerance is +70%/−35%, and calibration is performed in-system via SPI command - eliminating BOM cost and board space for external timing components.
How many stepper motors can the MCZ33991EG drive simultaneously, and what is the coil configuration?
The MCZ33991EG drives two independent two-phase stepper motors simultaneously. Each motor connects to a dedicated pair of differential H-bridge outputs: Motor 0 uses SIN0±/COS0±, and Motor 1 uses SIN1±/COS1±. All eight H-bridge terminals operate in linear four-quadrant mode to deliver precise current control for torque, direction, and microstepping - supporting MMT-licensed AFIC 6405-compatible motors.
What fault protection features are integrated into the MCZ33991EG?
The MCZ33991EG integrates multiple hardware-level protections: overvoltage detection (26–38 V VPWR trip), undervoltage detection (5.0–6.2 V VPWR warning), overtemperature shutdown (155°C activation with 8–16°C hysteresis), and output current limiting (40–170 mA per channel). Fault status is reported in real time via SPI-readable status bits - including individual gauge overtemp, battery out-of-range, and clock calibration error flags - enabling robust system-level diagnostics.
Is the MCZ33991EG pin-compatible with other Freescale gauge drivers like the MC33811 series?
No, the MCZ33991EG is not pin-compatible with the MC33811 series. It uses a 24-pin SOICW package with eight GND pins, dual motor H-bridge outputs (16 pins), and dedicated SPI/control signals - whereas MC33811AE is a 20-pin device with single-motor support and different pin allocation. Migration requires PCB layout revision and firmware adaptation due to architectural differences in register mapping, microstepping resolution, and dual-channel control logic.
MCZ33991EG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (8)
- Interface:
- SPI
- Technology:
- -
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- 40mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Voltage - Load:
- 6.5V ~ 26V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MCZ33991EG FAQ
1.How can I place an order for MCZ33991EG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33991EG 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 MCZ33991EG reliable?
The price and inventory of MCZ33991EG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33991EG is usually 5 days.
3.What payment methods are accepted for MCZ33991EG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33991EG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33991EG?
MCZ33991EG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33991EG 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 MCZ33991EG?
For technical support, including MCZ33991EG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33991EG requirements.
6.How does Aetrix verify that MCZ33991EG is sourced from the original manufacturer or authorized distributors?
All MCZ33991EG 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 MCZ33991EG meets industry standards.
7.What is the process for return or replacement of MCZ33991EG?
All MCZ33991EG units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33991EG, 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 MCZ33991EG part is unused and in its original packaging.
Return procedure for MCZ33991EG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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