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NXP Semiconductors MCZ33991EGR2
- Part No.:
- MCZ33991EGR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MCZ33991EGR2.pdf
- Description:
- IC MTR DRV BIPLR 4.5-5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
MCZ33991EGR2 from NXP Semiconductors (formerly Freescale) is a SPI-controlled dual stepper motor gauge driver IC for automotive instrumentation. It integrates four dual-output H-bridge drivers, supports 4096 steady-state pointer positions, delivers up to 40 mA per coil output, and enables analog microstepping at 12 steps/degree - used to drive two-phase MMT-licensed instrumentation stepper motors in cluster gauges.
For engineers reviewing the MCZ33991EGR2 datasheet, MCZ33991EGR2 pinout, MCZ33991EGR2 application, or MCZ33991EGR2 equivalent, key selection criteria include its 24-pin SOICW package, 5 V logic supply with 6.5–26 V VPWR operation, calibrated internal oscillator (±10% accuracy), air-core movement emulation, and fault reporting via SPI status register.
Technical Context
The MCZ33991EGR2 implements a fully integrated state machine for pointer position, velocity, and acceleration control - executing preloaded ROM-based step timing profiles without MCU intervention. Its dual H-bridge pairs (SIN0/COS0 and SIN1/COS1) support four-quadrant linear current drive per coil, enabling precise sinusoidal excitation for smooth 340° pointer sweep and 4500°/s² max acceleration.
Control is executed over a 16-bit SPI interface (1–3 MHz) with CS/SCLK/SI/SO signals; status feedback (over-temperature, VPWR out-of-range, clock faults) is returned MSB-first on SO during each transaction. Internal clock calibration uses an 8 µs pulse on CS, with selectable nominal frequencies of 1 MHz or 667 kHz depending on PECR bit D2/D4 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range (VPWR) | 6.5 V to 26 V - powers motor coils directly from automotive battery rail; includes under/over-voltage detection at 5.6 V / 32 V thresholds. |
| Logic Supply (VDD) | 4.5 V to 5.5 V - powers SPI interface and internal logic; requires stable 5 V source independent of VPWR. |
| Output Current per Coil | 40 mA continuous - sufficient to drive standard 2-phase instrumentation stepper motors (e.g., MMT AFIC 6405 derivatives) without external amplification. |
| Pointer Resolution | 4096 positions - enables sub-degree positioning accuracy (0.083°/step) across full 340° mechanical sweep. |
| Max Pointer Velocity | 400°/s - achieved using calibrated internal oscillator; actual speed scales linearly with oscillator frequency tolerance. |
| Microstepping Granularity | 12 steps/degree - provides analog-equivalent smoothness by interpolating between full-step positions using linear H-bridge output voltage weighting. |
| SPI Interface Speed | 1.0–3.0 MHz - supports real-time position updates and status polling with guaranteed setup/hold timing (e.g., TLEAD ≥ 50 ns). |
Pinout & Package
MCZ33991EGR2 is housed in a 24-pin wide-body SOIC (SOICW) package with exposed thermal pad (Pb-free EG suffix). Pin layout supports dual-motor drive with dedicated ground pins (pins 5–8, 17–20) for low-impedance return paths and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 21–24 | H-Bridge Output (COS0±, SIN0±, SIN1±, COS1±) | Eight half-bridge outputs driving two independent 2-phase stepper motors; each pair delivers bidirectional current for sine/cosine coil excitation. |
| 5–8, 17–20 | GND | Dedicated ground connections for logic, low-side transistors, and thermal conduction; multiple pins reduce IR drop and improve thermal performance. |
| 9 | CS | Chip select input with internal pull-up; enables SPI communication and serves as calibration trigger when pulsed with 8 µs width. |
| 10 | SCLK | Serial clock input with internal pull-down; clocks 16-bit SPI data on falling edge (SI) and rising edge (SO); requires 50% duty cycle. |
| 11 | SO | Tri-state serial output; returns 16-bit status word (fault flags, clock lock, RTZ confirmation) MSB-first during CS low. |
| 12 | SI | Serial input with internal pull-down; accepts 16-bit command words (PECR, VELR, POS0R, etc.) MSB-first on SCLK falling edge. |
| 13 | RTZ | Multiplexed output; drives non-driven coil during Return-to-Zero sequence to assist pointer homing without mechanical stops. |
| 14 | VDD | 5 V logic supply input; powers SPI interface, control logic, and internal reference - must be decoupled locally. |
| 15 | RST | Active-low reset input with internal pull-up; forces all registers and state machines to default values; used for sleep entry. |
| 16 | VPWR | Battery supply input (6.5–26 V); powers H-bridge drivers and internal regulators; includes OV/UV detection circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| MMT-licensed two-phase stepper compatibility | Directly interfaces with licensed AFIC 6405-class motors - eliminates need for custom motor qualification in automotive clusters. |
| Fully integrated pointer movement state machine | Executes acceleration/deceleration profiles from ROM tables - reduces MCU firmware overhead and guarantees deterministic motion timing. |
| Analog microstepping (12 steps/degree) | Generates smooth pointer transitions by linearly weighting H-bridge outputs - avoids audible stepping noise and jerky movement. |
| Calibratable internal oscillator (±10% accuracy) | Enables precise velocity/acceleration control without external crystal; calibration uses single 8 µs pulse on CS pin. |
| Pointer calibration and return-to-zero (RTZ) | Supports electronic zeroing via RTZ command and confirmation register - removes dependency on mechanical end-stops or optical sensors. |
| Low sleep mode current (≤60 µA) | Minimizes quiescent draw during vehicle off-state - meets automotive OEM requirements for battery drain budgets. |
Applications
| Automotive Instrument Clusters | Digital Gauge Modules |
|---|---|
|
Use Scenario: Driving speedometer, tachometer, fuel, and temperature needles in modern digital instrument panels. IC Role / Device Role / Timing Role: Dual-gauge driver IC managing position, velocity, and acceleration of two independent stepper motors via SPI commands. Use Value: Enables high-fidelity air-core emulation with 4096-position resolution and 400°/s max sweep - meeting OEM visual quality and response time targets. |
Use Scenario: Replacing legacy air-core meters with stepper-based solutions in mid-tier vehicle platforms. IC Role / Device Role / Timing Role: System-level gauge controller providing calibrated motion profiles and fault-aware operation without MCU motion algorithm development. Use Value: Reduces BOM count by integrating H-bridges, oscillator, and state machine - cutting PCB area and software validation effort. |
| Automotive HVAC Control Panels | Commercial Vehicle Dashboard Systems |
|
Use Scenario: Controlling rotary actuators for temperature blend doors or mode selector dials with analog-like precision. IC Role / Device Role / Timing Role: Stepper motor driver delivering programmable microstepped motion synchronized to user input latency requirements. Use Value: Supports 340° mechanical sweep and 4500°/s² acceleration - enabling fast, quiet, and repeatable actuator positioning. |
Use Scenario: Driving multi-needle gauges in heavy-duty truck or bus dashboards operating across -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Automotive-qualified gauge driver with VPWR UV/OV protection, over-temperature shutdown (155°C), and AEC-Q100 alignment. Use Value: Ensures robust operation under harsh electrical conditions (load dump, cold crank) while maintaining pointer accuracy over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gauge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33812EGR2 | Single-channel variant; lacks second motor channel and RTZ multiplexed output; lower pin count (20-pin SOIC). | Suitable only for single-gauge systems; cannot replace dual-motor functionality of MCZ33991EGR2 without redesign. | Select when cost or board space constraints eliminate need for dual-gauge capability. |
| MAX33810ETL+ | Higher output current (100 mA/channel); SPI-compatible but uses different register map and lacks built-in microstepping ROM tables. | Requires full MCU implementation of motion profiles; no air-core emulation or automatic RTZ sequence. | Choose when higher torque or custom motion algorithms are required, accepting increased firmware burden. |
Compared with MC33812EGR2 and MAX33810ETL+, the MCZ33991EGR2 uniquely delivers dual-motor control with embedded motion intelligence, calibrated oscillator, and RTZ support - making it the only drop-in solution for production automotive instrument clusters requiring two synchronized gauges and minimal MCU involvement.
Availability
MCZ33991EGR2 is available at Aetrix Electronics and suitable for automotive instrument clusters, digital gauge modules, and commercial vehicle dashboard systems requiring stable component supply, long-term lifecycle support, and AEC-aligned sourcing.
Supply support for MCZ33991EGR2 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 automotive, industrial, and IoT applications, with deep expertise in embedded processing and analog power solutions.
The MCZ33991EGR2 belongs to NXP's automotive analog gauge driver product line, designed specifically to replace air-core meters with stepper-based instrumentation while minimizing MCU resource usage and ensuring ASIL-B compatible functional safety readiness.
FAQ
What is the function of the RTZ pin on the MCZ33991EGR2?
The RTZ pin on the MCZ33991EGR2 is a multiplexed output that drives the non-driven coil during the Return-to-Zero (RTZ) sequence. It enables electronic homing of the stepper motor pointer without mechanical end-stops by applying controlled current to assist in reaching the calibrated zero position - a feature critical for automotive cluster self-calibration. This behavior is activated only when the RTZR register is written.
Does the MCZ33991EGR2 require an external crystal or resonator?
No, the MCZ33991EGR2 does not require an external crystal or resonator. It contains a calibratable internal oscillator with typical uncalibrated accuracy of +70%/−35%, which can be tightened to ±10% via an 8 µs pulse on the CS pin. The oscillator supports nominal frequencies of 1 MHz or 667 kHz depending on PECR bit D2/D4 settings - eliminating BOM cost and layout complexity associated with external timing components.
How many stepper motors can the MCZ33991EGR2 drive simultaneously?
The MCZ33991EGR2 drives two independent two-phase stepper motors simultaneously - one via SIN0+/SIN0−/COS0+/COS0− outputs and the other via SIN1+/SIN1−/COS1+/COS1− outputs. Each motor is controlled separately through dedicated position (POS0R/POS1R), velocity (VELR), and enable bits in the PECR register, allowing asynchronous motion profiles and independent fault handling.
What is the maximum operating temperature range for the MCZ33991EGR2?
The MCZ33991EGR2 is rated for operation from −40°C to +125°C ambient temperature, with a maximum junction temperature of +150°C. It includes integrated over-temperature shutdown at 155°C (typical) with 8–16°C hysteresis, and thermal resistance θJA = 60°C/W - enabling reliable deployment in under-hood and instrument panel environments where thermal management is constrained.
Can the MCZ33991EGR2 be used outside automotive applications?
Yes, the MCZ33991EGR2 can be used in non-automotive applications such as industrial panel meters, medical device displays, and test equipment requiring precise, quiet, and programmable needle movement - provided the 6.5–26 V VPWR supply, 5 V logic rail, and SPI interface are supported. Its 4096-position resolution, 340° sweep, and analog microstepping deliver high-fidelity motion regardless of end market.
MCZ33991EGR2 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 (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
MCZ33991EGR2 FAQ
1.How can I place an order for MCZ33991EGR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33991EGR2 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 MCZ33991EGR2 reliable?
The price and inventory of MCZ33991EGR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33991EGR2 is usually 5 days.
3.What payment methods are accepted for MCZ33991EGR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33991EGR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33991EGR2?
MCZ33991EGR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33991EGR2 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 MCZ33991EGR2?
For technical support, including MCZ33991EGR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33991EGR2 requirements.
6.How does Aetrix verify that MCZ33991EGR2 is sourced from the original manufacturer or authorized distributors?
All MCZ33991EGR2 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 MCZ33991EGR2 meets industry standards.
7.What is the process for return or replacement of MCZ33991EGR2?
All MCZ33991EGR2 units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33991EGR2, 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 MCZ33991EGR2 part is unused and in its original packaging.
Return procedure for MCZ33991EGR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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