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  4. Maxim Integrated — MAX33012EASA+ CAN Transceiver

Maxim Integrated — MAX33012EASA+ CAN Transceiver

 

 

Maxim Integrated

Maxim Integrated MAX33012E CAN Transceiver

+5V, 5Mbps with ±65V Fault Protection, Fault Detection and Reporting, ±25V CMR, and ±45kV ESD Protection

The Maxim Integrated MAX33011E is part of a +5V CAN transceiver family with integrated protection for industrial applications. The MAX33012E is equipped with extended ±65V fault protection on the CAN bus for applications where overvoltage protection is required.

The MAX33011E Control Area Network transceiver family also incorporates high ±45kV ESD HBM protection and an input common mode range (CMR) of ±25V, exceeding ISO11898 specification of -2V to +7V, and is best suited for applications where ground planes from different systems are shifting relative to each other.

Fault Detection

The MAX33011E transceiver family incorporates a fault detection feature where it monitors the CANH and CANL line for faults like overcurrent, overvoltage, and transmission failure. When a fault is detected, the FAULT pin goes high, which triggers an external interrupt with the local CAN controller, and the driver and receiver lines are placed in recessive mode. The system clock then drives the TXD pin and a fault code is transmitted through the RXD line back to the controller. When the specific fault code is transmitted and the system is programmed to alert local service personnel, they are able to troubleshoot and debug the problem quicker, providing valuable diagnostics and decreased equipment downtime. In addition, the family features a variety of options to address common CAN application requirements; low-current standby mode, slow slew rate for improved EMI performance, silent-mode to disable the transmitter, low level translation to interface with low voltage controllers, and loopback mode for remote self diagnostics.

Packaging

The MAX33011E (and MAX33012E) are in standard 8-pin SOIC package and the MAX33014E and MAX33015E are in a 10-pin TDFN-EP package. The family of devices operate over the -40°C to +125°C temperature range.

MAX33011E Features

  • Integrated Protection Increases Robustness
    • ±65V Fault Tolerant CANH and CANL
    • ±45kV ESD HBM (Human Body Model)
    • ±30kV IEC Air-Gap and ±12kV IEC Contact
    • ±25V Extended Common Mode Input Range (CMR)
    • Transmitter Dominant Timeout Prevents Lockup
    • Short-Circuit Protection Limits Driver Current
    • Thermal Shutdown
  • Family Provides Flexible Design Options
    • 1.62V to 5.5V Logic-Supply (VL) Range (MAX33014E and MAX33015E)
    • Silent Mode S Disables Transmitter (MAX33011E and MAX33015E)
    • STBY Input For Low-Current, Slow Slew Rate, and Normal Mode (MAX33012E and MAX33014E)
    • LPBK Enables Remote Diagnostics (MAX33014E and MAX33015E)
  • Fault Detection and Reporting
    • Detects Overcurrent, Overvoltage, and
    • Transmission Failure
    • Error Code Reporting Through RXD
    • Operating Temperature Range of -40°C to +125°C

Applications

  • Industrial Automation
  • Building Automation
  • Vending Machines
  • Security Systems
  • Heavy Equipment/Machinery

 

MAX33011E Block Diagram

Maxim Integrated – MAX33011E/12E/14E/15E Block Diagram

 

 

Related Material

 

Maxim Integrated – MAX33012ESHLD