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NXP Semiconductors MCZ33879AEK
- Part No.:
- MCZ33879AEK
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33879AEK.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:8 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,553
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Product details
Overview
MCZ33879AEK from NXP Semiconductors is a configurable octal high-side/low-side serial switch IC with SPI interface, open-load detection current disable capability, and SMARTMOS power architecture. It delivers 0.75 Ω RDS(ON) at 25 °C, supports 5.5–27.5 V supply range, and integrates independent overtemperature protection and +45 V / –20 V output clamping for inductive load switching in automotive body control modules.
For engineers reviewing the MCZ33879AEK datasheet, MCZ33879AEK pinout, MCZ33879AEK application, or MCZ33879AEK equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and application differences - all aligned to Rev. 12.1 (May 2023) product data sheet.
Technical Context
The MCZ33879AEK implements an 8-channel hardware-configurable power switch using DMOS output transistors controlled via 16-bit SPI. Each channel supports independent high-side or low-side configuration, with two outputs (OUT5/OUT6) additionally controllable via direct PWM inputs (IN5/IN6), enabling dynamic duty-cycle modulation up to 2.0 kHz.
Its diagnostic architecture includes per-output open-load detection (with programmable current disable), short-circuit detection with automatic retry, cascade fault reporting via DO pin, and dual-voltage clamp protection (+45 V for low-side, –20 V for high-side). Internal reverse-battery protection on VPWR and loss-of-ground/supply immunity ensure robust operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 27.5 V - Enables direct battery rail connection in 12 V/24 V automotive systems without external regulators. |
| RDS(ON) (Typical) | 0.75 Ω at 25 °C - Minimizes conduction loss and self-heating during 0.6–1.2 A load drive. |
| Output Clamp Voltage | +45 V (low-side), –20 V (high-side) - Limits inductive kickback energy to protect MOSFETs and downstream circuitry. |
| SPI Interface | 3.3 V / 5.0 V compatible, ≤4 MHz - Allows seamless integration with legacy and modern microcontrollers without level-shifting. |
| Standby Current | ≤5.0 µA at 13 V VPWR - Supports ultra-low-power sleep mode for always-on vehicle subsystems. |
| Fault Reporting | Single-bit DO output with daisy-chain support - Enables compact wiring and centralized diagnostics across multiple devices. |
| Operating Temperature | –40 °C to +125 °C ambient - Qualified for under-hood and chassis-mounted automotive applications. |
Pinout & Package
MCZ33879AEK uses HSOP32 (SOT1746-1) package: 32-pin thermal-enhanced plastic small-outline, 0.65 mm pitch, 7.5 × 11 × 2.22 mm body, –40 to +125 °C rating. Exposed pad (EP) must be connected to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Digital ground reference | Primary logic ground return; EP termination point for thermal management. |
| VDD (Pin 2) | Logic supply input | Provides 3.1–5.5 V for SPI interface; device enters Sleep mode if VDD ≤ 0.8 V. |
| S8–S1 (Pins 3,10,20,23,27,29,32,13) | Source outputs | Connect to load high-side in high-side config or system ground in low-side config. |
| D8–D1 (Pins 5,7,11,22,26,28,31,12) | Drain outputs | Connect to battery in high-side config or load low-side in low-side config. |
| IN5/IN6 (Pins 14,19) | PWM direct control inputs | OR-gated with SPI bits; enable hardware PWM for OUT5/OUT6 up to 2.0 kHz. |
| EN (Pin 15) | Enable input | Active-high; forces all outputs OFF and disables open-load current when low. |
| CS/DI/SCLK/DO (Pins 18,17,16,32) | SPI interface | Standard 4-wire SPI with tri-state DO; CS falling edge initiates data transfer. |
| VPWR (Pin 31) | Battery supply input | –16 V to +45 V tolerant with internal reverse-battery protection; powers internal bias circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable high-/low-side topology | Each of 8 outputs independently wired as high-side or low-side - enables flexible load interface without redesign. |
| Programmable open-load detect current | Disable per-output open-load detection via SPI - eliminates false faults in LED or capacitive loads. |
| Independent overtemperature shutdown | 155–185 °C trip threshold with 5–15 °C hysteresis - prevents thermal runaway without system-wide reset. |
| Cascade fault reporting | Single DO pin reports faults across daisy-chained devices - reduces MCU GPIO count and simplifies diagnostics. |
| Low quiescent current sleep mode | ≤5.0 µA VPWR current at 13 V - meets automotive ISO 16750-2 off-mode leakage requirements. |
| Inductive transient clamping | +45 V (low-side) / –20 V (high-side) clamp - eliminates need for external TVS diodes in solenoid/relay drivers. |
Applications
| Automotive Body Control | Industrial Actuator Control |
|---|---|
Use Scenario: Controlling door locks, mirror adjusters, and seat motors in 12 V vehicle platforms. IC Role / Device Role / Timing Role: Octal high-side/low-side switch managing bidirectional actuator current with integrated fault reporting. Use Value: Eliminates discrete driver transistors and external protection components while enabling per-channel diagnostics via SPI. |
Use Scenario: Driving solenoid valves and pneumatic actuators in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Serial-controlled power switch with open-load detection for verifying valve coil integrity before actuation. Use Value: Reduces PCB area by 60% vs. discrete MOSFET+driver solutions and enables predictive maintenance via fault logging. |
| LED Lighting Management | Brush DC Motor Control |
Use Scenario: Switching multi-string automotive LED headlamps and DRLs with current-limiting and open-circuit detection. IC Role / Device Role / Timing Role: Low-side configured switch with programmable open-load detect current disable to avoid false faults on LED loads. Use Value: Prevents erroneous fault flags during PWM dimming and ensures reliable lamp-on verification. |
Use Scenario: H-bridge half-bridge control for reversible 12 V brush DC motors in power seats and HVAC dampers. IC Role / Device Role / Timing Role: Dual-channel PWM-capable outputs (IN5/IN6) driving complementary high-/low-side pairs. Use Value: Enables precise speed/torque control without external gate drivers; built-in current limiting protects motor windings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal serial switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883AEK | Higher RDS(ON) (1.2 Ω typ), no IN5/IN6 PWM inputs, lower VPWR max (40 V) | Lacks direct PWM control; suited for static load switching only | Select when cost sensitivity outweighs need for dynamic output control. |
| TPIC2810PWP | 8-channel, 3.3 V–5.5 V logic only, no VPWR reverse-battery protection, no thermal shutdown | Requires external protection circuitry; limited to non-automotive industrial use | Select for 5 V-only systems where automotive qualification is unnecessary. |
Compared with MCZ33879AEK, MC33883AEK trades PWM flexibility for lower unit cost, while TPIC2810PWP lacks automotive-grade protection features - making MCZ33879AEK the only option supporting direct PWM, reverse-battery immunity, and independent thermal shutdown in one package.
Availability
MCZ33879AEK is available at Aetrix Electronics and suitable for automotive body electronics, industrial actuator control, LED lighting systems, and brush DC motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCZ33879AEK 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive power management and functional safety.
The MCZ33879AEK belongs to NXP's SMARTMOS family of configurable power switches, designed specifically for automotive body control units requiring high reliability, integrated diagnostics, and reduced system-level BOM cost.
FAQ
What is the maximum operating voltage for MCZ33879AEK?
The MCZ33879AEK supports a VPWR supply range of –16 V to +45 V, with overvoltage shutdown triggered at 28–33 V depending on variant. This allows direct connection to 24 V commercial vehicle batteries and tolerance of load-dump transients per ISO 7637-2.
Does MCZ33879AEK support both high-side and low-side switching configurations?
Yes, MCZ33879AEK supports hardware-configurable high-side and low-side switching per channel. Drain pins (D1–D8) connect to battery in high-side mode or load low-side in low-side mode; source pins (S1–S8) connect to load or ground accordingly - enabling full flexibility without external component changes.
How does open-load detection work on MCZ33879AEK, and can it be disabled?
MCZ33879AEK performs open-load detection by sourcing a small current (60–190 µA depending on configuration) through each OFF output. This current can be disabled per channel via SPI command - critical for avoiding false faults in LED or capacitive loads where leakage paths are absent.
What protection features are integrated into MCZ33879AEK?
MCZ33879AEK integrates short-circuit detection with automatic retry, independent overtemperature shutdown (155–185 °C), +45 V / –20 V output clamping, internal reverse-battery protection on VPWR, and immunity to loss-of-ground or loss-of-supply conditions - ensuring safe operation without external protection components.
Is MCZ33879AEK qualified for automotive applications?
Yes, MCZ33879AEK is AEC-Q100 qualified, operates from –40 °C to +125 °C ambient, and meets automotive EMC and reliability standards including ISO 11452-2/4/5 and ISO 7637-2. Its HSOP32 package is optimized for thermal dissipation in under-hood environments.
MCZ33879AEK 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 ~ 27.5V
- 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
MCZ33879AEK FAQ
1.How can I place an order for MCZ33879AEK through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33879AEK 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 MCZ33879AEK reliable?
The price and inventory of MCZ33879AEK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33879AEK is usually 5 days.
3.What payment methods are accepted for MCZ33879AEK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33879AEK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33879AEK?
MCZ33879AEK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33879AEK 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 MCZ33879AEK?
For technical support, including MCZ33879AEK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33879AEK requirements.
6.How does Aetrix verify that MCZ33879AEK is sourced from the original manufacturer or authorized distributors?
All MCZ33879AEK 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 MCZ33879AEK meets industry standards.
7.What is the process for return or replacement of MCZ33879AEK?
All MCZ33879AEK units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33879AEK, 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 MCZ33879AEK part is unused and in its original packaging.
Return procedure for MCZ33879AEK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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