MLX80050/51/30/31 Enhanced LIN System Basis IC

By Melexis Technologies NV 45

MLX80050/51/30/31 Enhanced LIN System Basis IC

Melexis' MLX8005x/3x consist of a low-drop voltage regulator, 5 V / 3.3 V / 70 mA, combined with a reset/watchdog unit and a LIN bus transceiver. The LIN transceiver is suitable for LIN bus systems as it conforms to LIN specification revision 2.x and SAE J2602. The watchdog times of the integrated window watchdog can be adapted on application needs via external resistors. With the help of an external bipolar transistor, it is possible to extend the output current of the integrated voltage regulator. The combination of voltage regulator and bus transceiver, as well as watchdog unit, makes it possible to develop simple, but powerful and cheap slave nodes in LIN bus systems.

The Melexis MLX8005X/3X extends its successful LIN transceiver and system basis product line for the simple and effective development of LIN slaves. This IC transceiver combines a physical layer LIN transceiver, according to LIN 2.x, as well as SAEJ2602 with a 3.3 V or 5 V voltage regulator, with RESET output, for the connected microcontroller and a window watchdog. This enhanced IC transceiver is optimized in accordance with the increased EMC requirements for single-wire bus systems, as well as the “hardware requirements for LIN, controller area network (CAN), and Flexray interfaces in automotive applications” defined from German OEMs. Their MLX8005X/3X achieves world-leading ESD robustness of greater than 20 kV with direct discharge, as well as greater than 15 kV with indirect discharge according to IEC61000-4-2.

Features
  • LIN 2.x / SAE J2602 compliant
  • Operating voltage VSUP = 5 V to 27 V
  • Three modes: normal, silent, and sleep
  • Linear low-drop voltage regulator
  • MLX80030/31:
    • Normal mode 3.3 V / 70 mA ±2%
    • Silent mode 3.3 V / 20 mA ±2%
  • MLX80050/51:
    • Normal mode 5 V / 70 mA ±2%
    • Silent mode 5 V / 20 mA ±2%
  • Low current consumption (typ.)
    • Sleep mode 20 µA
    • Silent mode “no-load” 45 µA
  • Enhanced ESD robustness according to IEC 61000-4-2
    • Direct ESD discharge for pin LIN >20 kV (only LIN cap connected) and for pin VBAT >15 kV
    • Indirect ESD discharge for pin LIN >15 kV
  • Ignition input
  • Automotive temperature range of -40°C to 125°C
  • Output current limitation

 

  • LIN-bus transceiver
    • Baud rate up to 20 kBaud
    • Slew rate control for best EME behavior
    • Low slew mode for optimized SAE J2602 transmission
    • High-impedance LIN pin, in case of loss of ground or battery
    • Bus input voltages -24 V to 30 V independent from VBAT
  • VCC under-voltage detection at NRES output (start-up delay 4 ms)
  • VSUP under-voltage detection (POR), over temperature shutdown
  • TxD dominant time-out function, standby mode time out after 350 ms
  • Programmable window watchdog
  • Output current extension via external transistor
  • Additional WAKE input
  • Interface I/Os independent from voltage regulator output
  • Remote and local wake-up source recognition
Applications
  • Automotive
    • Body
    • HVAC
    • Comfort and lighting

 

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