MCZ33390EFR2

Drivers, Receivers, Transceivers Overview

The MCZ33390EFR2 is a Class B serial transceiver designed for bi-directional half-duplex communication meeting the SAE J-1850 standard. It operates from a vehicle's 12 V battery system with a supply voltage range of 9.0 to 16 V and an ambient operating temperature of -40°C to 125°C. The device interfaces directly with 5.0 V CMOS microcontrollers, transmitting data on a single-wire bus at 10.4 kbps using Variable Pulse Width Modulation (VPWM). Key electrical parameters include a maximum VBAT capability of 40 V, operational battery current up to 32 mA, and thermal shutdown protection at approximately 170°C.

Drivers, Receivers, Transceivers Feature Summary

• Interfaces directly with standard 5.0 V CMOS microcontrollers without level shifting
• Provides short circuit protection for the BUS pin against shorts to battery and ground
• Includes thermal shutdown with hysteresis to protect the output driver during fault conditions
• Features voltage waveshaping on the bus output driver to minimize radiated EMI emissions

Drivers, Receivers, Transceivers Applications

• Automotive Class B Data Communication Network Interface applications
• Bi-directional half-duplex communication between onboard vehicle microcontrollers
• Single-wire bus transmission and reception in 12 V automotive battery systems

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through authorized NXP or Freescale distributors. Confirm the EF suffix indicates lead-free packaging compliance. Check datasheet revision history for any updates to ordering information or electrical characteristics prior to finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing for SAE J-1850 Class B networks requiring direct 5V logic interfacing. Ensure the application environment stays within the specified -40°C to 125°C temperature range. Verify that the power supply remains stable between 9.0 V and 16 V for full operational bus dynamics.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MC33390 family of serial transceivers manufactured by NXP Semiconductors (formerly Freescale). The MCZ33390EFR2 specifically denotes the lead-free (EF) variant packaged in an 8-lead SOIC Narrow body plastic package. It serves as the hardware interface layer for automotive control modules communicating over the Class B bus.

Drivers, Receivers, Transceivers Replacement Considerations

MC33390D/DR2

Drivers, Receivers, Transceivers FAQ

How does the device handle loss of assembly ground?

When assembly ground is lost, the LOAD pin switch biases itself off, limiting leakage current to less than 100 µA. This prevents the BUS pin from sourcing current and corrupting data on the network.

What is the function of the 4X/LOOP pin?

The 4X/LOOP pin controls the transmit mode. Logic 0 enables normal waveshaping, Logic 1 disables waveshaping for faster 4X transmitting, and high impedance activates loopback mode for diagnostic testing.

Can the receiver wake the microcontroller automatically?

No, the 33390 does not automatically wake up from sleep state upon bus activity. The microcontroller must explicitly enable the transmitter via the SLEEP pin after detecting activity.