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NXP Semiconductors MCZ33977EGR2
- Part No.:
- MCZ33977EGR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MCZ33977EGR2.pdf
- Description:
- IC MTR DRV BIPLR 4.5-5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,019
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Product details
Overview
MCZ33977EGR2 from NXP Semiconductors (formerly Freescale) is a SPI-controlled single-gauge stepper motor driver IC for automotive and industrial instrumentation. It integrates dual H-bridge coil drivers, a 4096-position state machine, air-core pointer movement emulation, and analog microstepping (12 steps/degree), delivering precise 340° pointer sweep with max velocity of 400°/s and acceleration of 4500°/s² in Switec MS-X15.xxx-compatible gauges.
For engineers reviewing the MCZ33977EGR2 datasheet, MCZ33977EGR2 pinout, MCZ33977EGR2 application, or MCZ33977EGR2 equivalent, this page provides verified technical context, real-world gauge-driving specifications, validated pin functions, confirmed alternative parts for stepper instrument clusters, and supply-chain support details specific to this Pb-free SOICW packaged device.
Technical Context
The MCZ33977EGR2 implements a fully integrated two-phase stepper motor control architecture with on-chip oscillator (calibrated 1.0 MHz), dual H-bridge drivers (SIN+/SIN−, COS+/COS−), and a dedicated pointer position/state machine that enforces velocity and acceleration constraints per motor physics. Its RTZ (Return to Zero) multiplexed output and sigma-delta ADC-based accumulator enable accurate mechanical zero calibration without external sensors.
It operates from VPWR = 6.5–26 V and VDD = 4.5–5.5 V, features overvoltage (26–38 V) and undervoltage (5.0–6.2 V) detection, thermal shutdown at 155–180°C, and supports daisy-chained SPI communication up to 2.0 MHz with 16-bit command framing and status feedback via SO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Type Support | MMT-licensed two-phase stepper motors (e.g., Switec MS-X15.xxx); enables drop-in replacement for air-core gauge systems |
| Pointer Resolution | 4096 steady-state positions across 340° sweep - supports high-fidelity analog-style display granularity |
| Microstepping Precision | Analog microstepping at 12 steps per degree - eliminates visible stepping artifacts in pointer motion |
| Max Pointer Velocity | 400°/s - sufficient for rapid needle sweeps in speedometer or tachometer applications |
| Max Pointer Acceleration | 4500°/s² - ensures responsive yet mechanically safe gauge transitions |
| Output Current Limit | 40–170 mA per H-bridge output (ILIM) - configurable drive strength for diverse coil impedances |
| SPI Interface Speed | Up to 2.0 MHz clock rate - enables low-latency command updates in real-time cluster control |
Pinout & Package
MCZ33977EGR2 is housed in a 24-pin SOICW (wide-body) package with Pb-free EG suffix, featuring four motor output terminals (SIN+, SIN−, COS+, COS−), dual power rails (VPWR, VDD), ground (8× GND), SPI interface (CS, SCLK, SI, SO), control pins (RST, RTZ), and four NC pins (21–24).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SIN+, SIN−, COS+, COS− | H-Bridge coil outputs | Four-quadrant current sourcing/sinking for two-phase stepper motor windings; enable precise torque and direction control |
| CS, SCLK, SI, SO | SPI interface signals | 16-bit serial command input and status readback; SO tri-states when CS is high to support daisy chaining |
| RST | Active-low reset | Forces internal logic to default state; internal pull-up allows sleep mode entry by holding RST = Logic [1] |
| RTZ | Multiplexed return-to-zero output | Drives non-driven coil during RTZ sequence; used with internal ADC for mechanical zero calibration |
| VDD | 5.0 V logic supply | Powers SPI interface and digital logic; tolerant of 4.5–5.5 V range with under-voltage reset at ≤4.5 V |
| VPWR | Battery input rail | Supplies H-bridge drivers directly; operates from 6.5–26 V with OV/UV detection and automatic disable |
| GND (Pins 5–8, 17–20) | Ground reference | Eight dedicated ground connections minimize noise coupling between analog, digital, and power domains |
Key Features
| Feature | Design Value |
|---|---|
| Air-core movement emulation | Fully integrated state machine replicates damped pointer inertia - eliminates need for external motion algorithms |
| Pointer calibration & RTZ | Hardware-accelerated return-to-zero with sigma-delta ADC accumulator - enables one-time factory calibration without MCU intervention |
| Internal calibrated oscillator | 1.0 MHz ±10% after calibration (pulse-width programmable); removes need for external crystal or timing components |
| Overvoltage/undervoltage protection | VPWR monitoring with 26–38 V OV and 5.0–6.2 V UV thresholds - disables outputs automatically to prevent coil damage |
| Low sleep-mode current | ≤60 µA (IPWRSLP1) with RST = Logic [0] - extends battery life in always-on instrument clusters |
Applications
| Automotive Speedometer | Industrial Pressure Gauge |
|---|---|
|
Use Scenario: Real-time vehicle speed indication with smooth needle sweep and fast response to throttle changes. IC Role / Device Role / Timing Role: Primary stepper motor controller managing coil current, position interpolation, and acceleration profiling. Use Value: 400°/s max velocity and 4500°/s² acceleration enable sub-200 ms 0–240 km/h sweeps while maintaining mechanical reliability. |
Use Scenario: Analog-style pressure readout in HVAC control panels or process monitoring systems with ambient temperature variation. IC Role / Device Role / Timing Role: Standalone gauge driver handling position accuracy, thermal drift compensation, and RTZ calibration. Use Value: 4096-position resolution and analog microstepping eliminate quantization jitter, ensuring stable pointer positioning across -40°C to 125°C. |
| Automotive Fuel Gauge | Avionics Altitude Indicator |
|
Use Scenario: Linearized fuel level display using resistive sender input mapped to pointer angle with hysteresis. IC Role / Device Role / Timing Role: SPI-commanded position actuator with built-in air-core emulation for natural damping behavior. Use Value: Emulated inertia reduces perceived needle oscillation during vehicle vibration - improves readability without software filtering. |
Use Scenario: High-reliability altitude readout requiring fail-safe zeroing and consistent step accuracy at altitude extremes. IC Role / Device Role / Timing Role: Certified gauge driver executing deterministic RTZ sequences and position hold with thermal shutdown protection. Use Value: Overtemperature shutdown (155–180°C) and VPWR fault detection ensure safe operation during extended climb/descent cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-gauge stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33816AEKR2 | Single-channel, 5V-only VDD, no internal oscillator calibration; requires external clock source | Lacks RTZ accumulator and air-core emulation logic - demands more MCU firmware overhead for motion control | Choose when cost sensitivity outweighs motion quality and calibration simplicity |
| DRV8833PWPR | H-bridge only (no integrated state machine, microstepping, or SPI interface); 2.7–10.8 V VPWR range | Requires full external motion control firmware and separate position sensing - not a functional substitute for gauge-specific features | Use only in custom designs where full algorithmic control is implemented externally |
Compared with MCZ33977EGR2, MC33816AEKR2 lacks on-chip oscillator calibration and RTZ hardware, increasing system-level design complexity, while DRV8833PWPR provides only raw H-bridge functionality - neither matches the integrated gauge-driver capability, pointer resolution, or motion-emulation fidelity of the MCZ33977EGR2.
Availability
MCZ33977EGR2 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial panel meters, and avionics gauge systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MCZ33977EGR2 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 acquired Freescale in 2015 and maintains full product continuity, qualification, and technical support for legacy Freescale analog and mixed-signal ICs including the 33977 family.
The MCZ33977EGR2 belongs to NXP's automotive analog gauge driver product line, designed specifically to replace air-core meters with stepper-based instrumentation while preserving analog user experience and minimizing ECU processing load.
FAQ
What is the primary function of the MCZ33977EGR2 in an automotive instrument cluster?
The MCZ33977EGR2 serves as a dedicated single-gauge stepper motor driver IC that replaces traditional air-core meter movements. It receives SPI commands from the cluster MCU and autonomously executes pointer positioning, acceleration/deceleration profiling, air-core emulation, and RTZ calibration - all without requiring real-time firmware intervention. This offloads motion control tasks from the host processor and ensures consistent, high-fidelity analog-style needle behavior in the MCZ33977EGR2-based system.
Does the MCZ33977EGR2 require an external crystal or clock source?
No, the MCZ33977EGR2 contains an internal oscillator that can be calibrated to 1.0 MHz ±10% using an 8.0 µs pulse applied to the calibration input. This eliminates the need for external timing components, reducing BOM count and PCB area. The calibrated oscillator drives all timing-critical functions including microstepping, velocity calculation, and SPI timing - making the MCZ33977EGR2 a self-contained solution for gauge control.
How does the MCZ33977EGR2 handle overvoltage and undervoltage conditions on the VPWR rail?
The MCZ33977EGR2 monitors VPWR continuously and disables its H-bridge outputs when voltage exceeds 26–38 V (overvoltage) or falls below 5.0–6.2 V (undervoltage). These thresholds are internally fixed and non-adjustable. Output disable is automatic and latched until cleared via SPI command or power cycle. This protects connected stepper motor coils from damage due to battery transients or brownout conditions - a critical safety feature in automotive environments where the MCZ33977EGR2 is deployed.
Can the MCZ33977EGR2 drive stepper motors other than Switec MS-X15.xxx series?
Yes - the MCZ33977EGR2 is MMT-licensed and compatible with any two-phase bipolar stepper motor meeting its electrical interface requirements: coil current ≤40 mA continuous per phase, coil resistance compatible with VPWR voltage range (6.5–26 V), and inductance supporting required step rates. While optimized for Switec MS-X15.xxx motors, it has been validated with equivalents such as MMT AFIC 6405 and select VDO/CTS variants. Motor-specific tuning (e.g., ILIM setting) may be required for optimal performance with non-Switec units.
What is the role of the RTZ pin on the MCZ33977EGR2, and how is it used in calibration?
The RTZ pin on the MCZ33977EGR2 is a multiplexed output that drives the non-active coil winding during Return-to-Zero sequences. During RTZ, the IC applies controlled current to one coil while measuring back-EMF or accumulated charge on the RTZ pin via its internal sigma-delta ADC. This measurement - the RTZ accumulator count - identifies true mechanical zero position independent of coil tolerance or aging. The value is stored and used to offset all subsequent position commands, enabling one-time factory calibration without external sensors - a core capability of the MCZ33977EGR2.
MCZ33977EGR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- 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
MCZ33977EGR2 FAQ
1.How can I place an order for MCZ33977EGR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33977EGR2 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 MCZ33977EGR2 reliable?
The price and inventory of MCZ33977EGR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33977EGR2 is usually 5 days.
3.What payment methods are accepted for MCZ33977EGR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33977EGR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33977EGR2?
MCZ33977EGR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33977EGR2 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 MCZ33977EGR2?
For technical support, including MCZ33977EGR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33977EGR2 requirements.
6.How does Aetrix verify that MCZ33977EGR2 is sourced from the original manufacturer or authorized distributors?
All MCZ33977EGR2 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 MCZ33977EGR2 meets industry standards.
7.What is the process for return or replacement of MCZ33977EGR2?
All MCZ33977EGR2 units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33977EGR2, 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 MCZ33977EGR2 part is unused and in its original packaging.
Return procedure for MCZ33977EGR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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