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NXP Semiconductors MCZ33879EK
- Part No.:
- MCZ33879EK
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33879EK.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:8 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,244
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Product details
Overview
MCZ33879EK from NXP Semiconductors is a configurable octal high-side/low-side serial switch IC with SPI interface, 0.75 Ω RDS(ON) at 25 °C, ±45 V/–20 V output clamping, and open-load detect current disable for LED applications. It drives incandescent lamps, solenoids, and relays in automotive body control modules.
For engineers reviewing the MCZ33879EK datasheet, MCZ33879EK pinout, MCZ33879EK application, or MCZ33879EK equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated package mapping to HSOP32, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MCZ33879EK integrates eight independently configurable DMOS power switches controlled via 16-bit SPI (up to 4 MHz), with two outputs (OUT5/OUT6) supporting direct PWM control via IN5/IN6 pins. Its SMARTMOS architecture combines CMOS logic, bipolar/MOS analog circuitry, and DMOS power transistors.
Each output features independent overtemperature shutdown (155–185 °C), short-circuit detection with automatic retry, and programmable open-load detection current. Fault reporting occurs through DO pin with bit-mapped status, while VPWR reverse-battery protection and <5 µA standby current support automotive low-power requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(ON) | 0.75 Ω typical at 25 °C - enables efficient 0.6–1.2 A load drive with minimal conduction loss |
| VPWR Range | 5.5–26.5 V - supports 12 V automotive battery systems with undervoltage (4.0 V) and overvoltage (28.5 V) shutdown |
| SPI Interface | 3.3 V / 5.0 V compatible, up to 4 MHz - allows direct connection to common microcontrollers without level-shifting |
| Output Clamp Voltage | +45 V (low-side), –20 V (high-side) - suppresses inductive kickback during turn-off in solenoid/motor loads |
| Standby Current | 2.0–5.0 µA at 13 V VPWR - meets automotive sleep-mode current budgets for always-on modules |
| Open-Load Detect | Configurable ON/OFF per output - disables detection current for LED biasing to prevent false fault triggers |
| Thermal Protection | Independent per-output overtemperature shutdown with 10 °C hysteresis - prevents thermal runaway under overload |
Pinout & Package
MCZ33879EK uses the HSOP32 (SOT1746-1) thermally enhanced plastic package: 32-pin, 0.65 mm pitch, 7.5 × 11 × 2.22 mm body, –40 to 125 °C operating range. Exposed pad (EP) must be connected to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Digital ground reference | Reference for all logic signals; ties to system ground and EP for thermal path |
| VDD (Pin 2) | Logic supply input | 3.1–5.5 V supply for SPI interface; device enters Sleep mode if ≤0.8 V |
| S1–S8 (Pins 3,10,20,23,27,29,32,?*) | Source outputs | Connect to load high-side (HS) or system ground (LS); define configuration per channel |
| D1–D8 (Pins 5,7,11,22,26,28,?,?) | Drain outputs | Connect to battery (HS) or load low-side (LS); clamp +45 V (LS) or –20 V (HS) during switching |
| IN5/IN6 (Pins 14,19) | PWM direct control inputs | OR-gated with SPI bits; enable 2 kHz PWM on OUT5/OUT6 without SPI overhead |
| EN (Pin 15) | Global enable input | Active-high; forces all outputs OFF and disables diagnostics when low |
| CS/DI/SCLK/DO (Pins 16–18,32) | SPI interface | 16-bit command/data transfer with fault-status readback; DO reports per-output faults as logic [1] |
| VPWR (Pin 31) | Battery supply input | –16 to 40 V operation with internal reverse-battery protection; powers internal bias and drivers |
*Pin numbering follows official datasheet Figure 3: S1=P10, S2=P6, S3=P23, S4=P27, S5=P20, S6=P13, S7=P29, S8=P3; D1=P11, D2=P7, D3=P22, D4=P26, D5=P21, D6=P12, D7=P28, D8=P5.
Key Features
| Feature | Design Value |
|---|---|
| Hardware-configurable topology | Each of 8 outputs individually set as high-side or low-side drive via PCB routing - eliminates firmware reconfiguration |
| Programmable open-load detect current | Disable per output to avoid false faults in LED bias circuits where leakage current would otherwise trigger detection |
| Cascade fault reporting | Single DO line daisy-chains multiple MCZ33879EK devices - reduces MCU GPIO count and simplifies multi-channel diagnostics |
| Independent overtemperature protection | Per-output thermal shutdown with 10 °C hysteresis - isolates only affected channel, preserving function of remaining outputs |
| Low quiescent current | ≤5.0 µA IPWR in Sleep mode at 13 V VPWR - meets OEM requirements for body-control modules in vehicle-off state |
Applications
| Automotive Body Control Module | Industrial Solenoid Driver |
|---|---|
|
Use Scenario: Centralized control of door locks, trunk release, and interior lighting in 12 V vehicle platforms. IC Role / Device Role / Timing Role: Octal high-side switch managing 8 independent 1 A resistive/inductive loads with SPI-based sequencing and fault logging. Use Value: Replaces discrete relay + driver combinations; reduces BOM count by 70% and enables predictive maintenance via open-load diagnostics. |
Use Scenario: Precision actuation of pneumatic valves in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-side configured switch driving 24 V DC solenoids with fast 0.3–1.0 V/µs slew rate and ±45 V transient suppression. Use Value: Eliminates external flyback diodes; withstands repeated inductive turn-off stress without degradation across 10M+ cycles. |
| LED Lighting Control | Brush DC Motor Starter |
|
Use Scenario: Adaptive interior ambient lighting with individual dimming control per zone in automotive cabins. IC Role / Device Role / Timing Role: High-side configured switch with open-load detect current disabled to prevent false fault reporting on LED strings. Use Value: Enables reliable LED biasing without diagnostic interference; supports PWM dimming via IN5/IN6 pins at ≤2 kHz. |
Use Scenario: Soft-start control of 12 V brushed motors in power tools and HVAC blowers. IC Role / Device Role / Timing Role: Dual-output H-bridge configuration (e.g., D1/S1 + D2/S2) with independent current limiting and thermal monitoring. Use Value: Prevents stall-induced thermal damage via per-channel 1.2 A current limit and 155 °C shutdown - extends motor life by 3× vs. unprotected drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal serial switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883EK | Higher RDS(ON) (1.1 Ω typ), no IN5/IN6 PWM inputs, 3.3 V-only SPI | Lacks direct PWM capability and 5 V logic compatibility - unsuitable for mixed-voltage MCU designs | Select when cost sensitivity outweighs PWM flexibility and 5 V interface needs |
| TPS27081AQPWPRQ1 | Single-channel, 1.8 A rated, no SPI interface, no open-load detection | Requires 8x discrete ICs and external MCU GPIO/fault logic - increases layout area and firmware complexity | Select only for ultra-low-channel-count applications where SPI consolidation is unnecessary |
Compared with MCZ33879EK, MC33883EK trades PWM control and voltage flexibility for lower unit cost, while TPS27081AQPWPRQ1 sacrifices integration density and diagnostics for higher per-channel current rating - neither offers drop-in replacement capability.
Availability
MCZ33879EK is available at Aetrix Electronics and suitable for automotive body control modules, industrial solenoid drivers, and LED lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCZ33879EK 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, delivering secure, energy-efficient, and scalable silicon solutions.
The MCZ33879EK belongs to NXP's SMARTMOS power switch family, engineered specifically for automotive-grade load driving with integrated diagnostics, robust transient protection, and low-power sleep modes.
FAQ
What is the maximum operating voltage for MCZ33879EK?
The MCZ33879EK supports a VPWR supply range of –16 V to +40 V, with overvoltage shutdown triggered at 28.5 V (typical) and undervoltage shutdown at 4.0 V (typical). This ensures safe operation across automotive battery transients including load dump and cold-crank conditions. The absolute maximum rating is 40 V, beyond which permanent damage may occur.
Does MCZ33879EK support both high-side and low-side drive configurations?
Yes, MCZ33879EK supports hardware-configurable high-side or low-side drive per channel via PCB routing of Sx and Dx pins. High-side configuration connects Sx to load and Dx to battery; low-side connects Dx to load and Sx to ground. Each mode activates corresponding voltage clamps (+45 V for low-side, –20 V for high-side) during inductive turn-off.
How does open-load detection work on MCZ33879EK, and can it be disabled?
MCZ33879EK provides per-output open-load detection current that can be enabled or disabled via SPI command. When enabled, it injects current to detect open circuits in high-side or low-side configurations. When disabled - as required for LED biasing - it prevents false fault reporting caused by LED reverse leakage, ensuring reliable status reporting in lighting applications.
What is the purpose of the IN5 and IN6 pins on MCZ33879EK?
The IN5 and IN6 pins on MCZ33879EK provide direct PWM control for outputs 5 and 6, operating in OR logic with their respective SPI bits. This allows real-time, low-latency PWM dimming or motor control without SPI transaction overhead. Maximum supported frequency is 2.0 kHz, and the SPI bit for each must be held low when using direct PWM control.
What thermal management provisions does MCZ33879EK include?
MCZ33879EK incorporates independent per-output overtemperature protection with shutdown threshold between 155 °C and 185 °C and 10 °C hysteresis. It also features an exposed pad (EP) thermally connected to die - recommended to be soldered to PCB ground plane - achieving 1.2 °C/W junction-to-pad thermal resistance for effective heat dissipation in HSOP32 packaging.
MCZ33879EK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 8
- Ratio - Input:Output:
- 1:8
- Output Configuration:
- High Side or Low Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 5.5V ~ 26.5V
- Voltage - Supply (Vcc/Vdd):
- 3.1V ~ 5.5V
- Current - Output (Max):
- 600mA
- Rds On (Typ):
- 750mOhm
- Input Type:
- -
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Open Load Detect, Over Voltage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC-EP
MCZ33879EK FAQ
1.How can I place an order for MCZ33879EK through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33879EK 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 MCZ33879EK reliable?
The price and inventory of MCZ33879EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33879EK is usually 5 days.
3.What payment methods are accepted for MCZ33879EK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33879EK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33879EK?
MCZ33879EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33879EK 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 MCZ33879EK?
For technical support, including MCZ33879EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33879EK requirements.
6.How does Aetrix verify that MCZ33879EK is sourced from the original manufacturer or authorized distributors?
All MCZ33879EK 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 MCZ33879EK meets industry standards.
7.What is the process for return or replacement of MCZ33879EK?
All MCZ33879EK units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33879EK, 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 MCZ33879EK part is unused and in its original packaging.
Return procedure for MCZ33879EK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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