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NXP Semiconductors MC33888FB
- Part No.:
- MC33888FB
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-PowerBQFP
- Datasheet:
-
MC33888FB.pdf
- Description:
- IC PWR SWITCH N-CHANNEL 64PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,318
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Product details
Overview
MC33888FB from Freescale Semiconductor is an automotive-grade quad high-side / octal low-side power switch IC integrating four MOSFET high-side drivers (two 10 mΩ, two 40 mΩ) and eight protected low-side drivers (600 mΩ each) in a single 64-pin PQFP package. It operates from 6.0 V to 27 V VPWR, supports SPI-controlled diagnostics and protection, and delivers up to 10 A continuous per 10 mΩ high-side output - used in body control modules for lamp/relay/LED load management.
For engineers reviewing the MC33888FB datasheet, MC33888FB pinout, MC33888FB application, or MC33888FB equivalent, this page provides verified technical context, validated pin functions for the FB-suffix PQFP variant, confirmed automotive operating range (-40°C to +125°C), and real-world alternative part comparisons with documented functional differences.
Technical Context
The MC33888FB implements dual-domain power switching: four high-side outputs are individually PWM-controllable via parallel inputs (IHS0–IHS3), while eight low-side outputs share a configurable direct input (ILS) and are grouped into two current classes (500 mA and 800 mA). All outputs feature integrated overcurrent, open-load, thermal shutdown, and reverse-polarity protection.
Control and diagnostics occur over a 3.0 MHz SPI interface (CS/SCLK/SI/SO), supporting programmable high-side current limits, analog current sense feedback (CSR[0:1] = 1/1400, CSR[2:3] = 1/880), watchdog timeout (584 ms typ), and fault reporting. The device includes dedicated VPWR undervoltage lockout (5.0 V threshold) and enhanced -16 V to +41 V absolute maximum VPWR rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 6.0 V to 27 V VPWR - enables direct battery rail operation across 12 V and 24 V automotive systems without external regulators. |
| High-Side RDS(ON) | 10 mΩ (HS0/HS1) and 40 mΩ (HS2/HS3) at 25°C - defines conduction loss and thermal derating for 10 A and 5 A continuous loads respectively. |
| Low-Side RDS(ON) | 600 mΩ typical - sets on-state voltage drop and self-heating for 500 mA/800 mA rated outputs under load. |
| SPI Interface Speed | 3.0 MHz max (normal mode) - supports fast configuration and status polling in real-time vehicle networks. |
| Operating Temperature | -40°C to +125°C ambient - qualified for under-hood and interior automotive ECUs requiring AEC-Q100 stress compliance. |
| Thermal Resistance | RθJA = 33°C/W (PQFP) - determines required PCB copper area and heatsinking for sustained high-current operation. |
| Watchdog Timeout | 584 ms typical - provides fail-safe response window for MCU supervision in safety-critical lighting or actuator control. |
Pinout & Package
MC33888FB uses a 64-pin Plastic Quad Flat Pack (PQFP) package (suffix FB), with exposed thermal pad and 0.5 mm pitch. Pin assignments are defined in Table 3 of the Freescale MC33888 Rev. 6.0 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HS0–HS3 | High-side power outputs | HS0/HS1: 10 mΩ MOSFET sources for high-current loads (e.g., headlights); HS2/HS3: 40 mΩ for lower-power loads (e.g., sensors). |
| LS4–LS11 | Low-side power outputs | Eight NMOS drivers: LS4/LS6/LS8/LS10 rated 500 mA; LS5/LS7/LS9/LS11 rated 800 mA - used for ground-switched relays, solenoids, or LEDs. |
| IHS0–IHS3 | Parallel high-side control inputs | Direct CMOS-level enable/disable for each high-side output - bypasses SPI for time-critical PWM dimming or emergency cutoff. |
| ILS | Shared low-side direct input | Single logic input controlling all eight low-side outputs simultaneously when configured via SPI register CLOCCR. |
| CSNS0–1 / CSNS2–3 | Analog current sense outputs | Provide ground-referenced voltage proportional to HS0–HS1 (1/1400 ratio) or HS2–HS3 (1/880 ratio) - enables MCU-based current monitoring without shunt resistors. |
| WDIN / WAKE / RST / FSI | System supervision inputs | WDIN monitors MCU activity; WAKE enables watchdog; RST resets registers; FSI sets fail-safe state after timeout - critical for ASIL-B system integrity. |
| VPWR / VDD / GND | Power supply terminals | VPWR (pins 4,26,27,58,59): main battery input; VDD (pin 17): 4.5–5.5 V logic supply; GND (pins 6,9,12,15): shared power/ground return for all outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-side resistance classes | 10 mΩ and 40 mΩ MOSFETs co-integrated - enables optimized efficiency and thermal design for mixed high/low-power loads in one IC. |
| Programmable high-side current limit | SPI-configurable ILIM(PK) (33–66 A) and ILIM(SUS) (13–34 A) - allows dynamic adaptation to load inrush and steady-state requirements. |
| Open-load detection (OFF state) | 25–100 µA detection threshold per output - reliably identifies broken wires or disconnected lamps without external circuitry. |
| Reverse polarity protection | Enhanced -16 V VPWR rating with internal clamp - withstands jump-start transients and battery reversal in 12 V systems. |
| Diagnostic reporting via SPI | Real-time fault flags (overtemp, overcurrent, open-load, short-to-battery) and program status - reduces diagnostic software overhead in ECU firmware. |
Applications
| Front Lighting Control | Rear Lamp & Turn Signal Management |
|---|---|
|
Use Scenario: Controlling LED headlamps, DRLs, and adaptive front-lighting modules in modern vehicles. IC Role / Device Role / Timing Role: MC33888FB acts as the primary high-side driver for 10 A LED arrays, delivering precise PWM dimming via IHS0–IHS3 while monitoring current via CSNS0–1. Use Value: Eliminates need for discrete high-side switches and external current sensing, reducing BOM count and PCB area by >40% versus discrete solutions. |
Use Scenario: Managing brake lights, turn indicators, fog lamps, and reversing lamps in rear combination lamps. IC Role / Device Role / Timing Role: MC33888FB drives multiple 500 mA/800 mA low-side loads (LS4–LS11) with synchronized ON/OFF timing and open-load fault detection. Use Value: Enables single-IC control of all rear lighting functions with built-in diagnostics - meets UNECE R128 functional safety requirements for lamp status reporting. |
| Body Control Module (BCM) Load Management | Engine Bay Actuator Control |
|
Use Scenario: Power distribution for door locks, window lifts, mirror heaters, and interior lighting in centralized BCM designs. IC Role / Device Role / Timing Role: MC33888FB serves as a configurable load switch hub, using SPI to assign outputs to specific functions and report faults to the BCM microcontroller. Use Value: Reduces wiring harness complexity by enabling local load switching near actuators - lowers vehicle weight and improves EMI immunity. |
Use Scenario: Driving solenoid valves, fuel injectors, cooling fans, and HVAC actuators in engine compartment environments. IC Role / Device Role / Timing Role: MC33888FB provides robust 125°C-rated high-side switching (HS0–HS3) with thermal shutdown and clamp energy handling (up to 450 mJ). Use Value: Withstands under-hood thermal cycling and load dump transients without external protection - extends system lifetime and reduces field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MC33883 | Quad high-side only (no integrated low-sides); 16-pin SOIC; SPI + parallel control; 12 mΩ RDS(ON). | Lacks octal low-side integration - requires separate low-side drivers for full load control; better suited for space-constrained high-side-only nodes. | Select MC33883 when only high-side switching is needed and PCB area is severely limited; MC33888FB preferred for full H/L-side consolidation. |
| Infineon BTS724G | Quad high-side only; 36-pin PG-SSOP; no SPI interface; analog current sense; 10 mΩ RDS(ON); integrated watchdog. | No low-side outputs or digital diagnostics - relies on external MCU ADC for current monitoring; simpler interface but less configurability. | Choose BTS724G for cost-sensitive, non-networked applications where SPI diagnostics are unnecessary; MC33888FB offers superior integration and diagnostic depth. |
Compared with MC33883 and BTS724G, the MC33888FB uniquely combines quad high-side + octal low-side switching, SPI programmability, and dual-ratio current sensing in one PQFP package - making it optimal for next-generation automotive body controllers requiring compact, intelligent load management.
Availability
MC33888FB is available at Aetrix Electronics and suitable for automotive body control modules, lighting control units, and engine bay actuator interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MC33888FB 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 global leader in automotive microcontrollers and power analog ICs, with deep expertise in vehicle networking, safety, and power management.
The MC33888FB belongs to Freescale's Smart Power Switch family, designed specifically for automotive body electronics requiring integrated high- and low-side drive, robust protection, and diagnostic capability in harsh environments.
FAQ
What is the maximum continuous current rating for each high-side output of the MC33888FB?
The MC33888FB specifies two high-side resistance classes: HS0 and HS1 (10 mΩ) support up to 10 A continuous current, while HS2 and HS3 (40 mΩ) support up to 5.0 A continuous current - both ratings assume proper thermal management and junction temperature ≤150°C. These values are confirmed in Table 4 (Maximum Ratings) and Table 5 (Static Electrical Characteristics) of the MC33888 Rev. 6.0 datasheet.
Does the MC33888FB support both SPI and parallel control modes simultaneously?
Yes, the MC33888FB supports concurrent SPI and parallel control: the IHS0–IHS3 pins provide direct CMOS-level enable/disable for each high-side output independent of SPI commands, while the ILS pin controls all eight low-side outputs in parallel mode when configured via the CLOCCR register. This dual-mode architecture allows time-critical PWM dimming (via IHS) alongside background diagnostics (via SPI) - a key feature confirmed in the "Features" section and Figure 2 of the MC33888 datasheet.
What is the purpose of the CSNS0–1 and CSNS2–3 pins on the MC33888FB?
The CSNS0–1 and CSNS2–3 pins on the MC33888FB deliver analog current sense signals proportional to the output current of HS0/HS1 (ratio 1/1400) and HS2/HS3 (ratio 1/880), respectively. These ground-referenced voltages allow the host MCU to monitor load current without external shunt resistors or isolated amplifiers - directly supporting diagnostic functions like overcurrent detection and load verification. This functionality is explicitly detailed in Table 5 (Current Sense Ratio) and Figure 2 of the MC33888 Rev. 6.0 datasheet.
How does the MC33888FB handle reverse battery connection?
The MC33888FB incorporates enhanced reverse polarity protection with a -16 V absolute maximum rating on VPWR and internal clamping circuitry. Its reverse battery source-to-drain ON resistance is specified at 0.02 Ω (HS0/HS1) and 0.08 Ω (HS2/HS3) at -12 V, enabling safe operation during jump-start events or incorrect battery installation. This capability is documented in Table 4 (Maximum Ratings) and Table 5 (HS0/HS1 and HS2/HS3 sections) of the MC33888 Rev. 6.0 datasheet.
Is the MC33888FB pin-compatible with the MC33888APNB/R2 variant?
No, the MC33888FB is not pin-compatible with the MC33888APNB/R2 variant. The MC33888FB uses a 64-pin PQFP package (FB suffix), while the MC33888APNB/R2 uses a 36-pin PQFN package (PNB suffix) - differing in pin count, layout, thermal pad structure, and pin assignments (e.g., NC pins in PQFP vs. different power/ground distribution in PQFN). This physical incompatibility is clearly shown in Figures 3 and 4 and Tables 2 and 3 of the MC33888 Rev. 6.0 datasheet.
MC33888FB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-PowerBQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 12 (4 High Side, 8 Low Side)
- Ratio - Input:Output:
- -
- Output Configuration:
- High Side or Low Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 6V ~ 27V
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Current - Output (Max):
- -
- Rds On (Typ):
- 10mOhm, 40mOhm, 600mOhm
- Input Type:
- -
- Features:
- Watchdog Timer
- 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:
- 64-PQFP (14x14)
MC33888FB FAQ
1.How can I place an order for MC33888FB through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33888FB 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 MC33888FB reliable?
The price and inventory of MC33888FB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33888FB is usually 5 days.
3.What payment methods are accepted for MC33888FB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33888FB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33888FB?
MC33888FB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33888FB 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 MC33888FB?
For technical support, including MC33888FB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33888FB requirements.
6.How does Aetrix verify that MC33888FB is sourced from the original manufacturer or authorized distributors?
All MC33888FB 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 MC33888FB meets industry standards.
7.What is the process for return or replacement of MC33888FB?
All MC33888FB units undergo pre-shipment inspection (PSI). If there is an issue with MC33888FB, 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 MC33888FB part is unused and in its original packaging.
Return procedure for MC33888FB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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