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    PCF7991AT/1081/M,1

    The NXP ABIC2 (PJF7992) is a next-generation immobilizer
    basestation with a high level of integration. It provides read and
    write access to an identification transponder. It offers a number
    of enhancements over the ABIC (PCF7991), including an
    on-chip voltage regulator and single-wire communication using
    the integrated LIN Transceiver
    Bidirectional communication with the device uses a serial
    interface that operates in SPI or single-wire fashion, according
    to the application needs. ABIC2 makes an external
    microcontroller at the basestation obsolete by integrating
    a single-wire protocol that is LIN “tolerant” and does not
    influence or affect further LIN slaves in the same LIN network.
    An external microcontroller can be added to implement another
    protocol layer, such as LIN 2.0. For this kind of application the
    ABIC2 derivative PJF7993 is offered.
    The ABIC2 IC is optimized for easy application, featuring a high
    level of integration in a small HTSSOP20 package and requiring
    very few external components.

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      SPECIFICATION

      Immobilizer transponder with 96-bit secret key
      448 Byte of EEPROM with versatile access configuration
      options
      Benefits
      Easy migration from PCF7936/37
      High security
      Fast authentication time
      The NXP PCF7938, an immobilizer transponder for advanced
      security, builds on the success of the field-proven PCF7936/37
      and PCF7939 (AES-128-Bit). It offers advanced security with a
      96-bit secret key, enabling an easy migration path for customers
      using the PCF7936. It offers more memory to store user data,
      with versatile access configuration options. As with other NXP
      immobilizer transponders, NXP offers keyless entry/go and
      remote keyless entry solutions fully compatible to PCF7938.
      ABIC2 features
      Fully integrated single-chip basestation (PJF7992, PJF7993)
      High-performance adaptive sampling time AM/PM
      demodulator
      Integrated voltage regulator with wide supply-voltage range
      (5.6 to 27 V)
      Antenna driver with wave shaping for improved spectral purity
      Serial interface featuring SPI and single-wire operation
      Integrated LIN 2.0/SAE J2602 transceiver
      (compatible with LIN 1.3)
      LIN 2.0-tolerant protocol optimized for reliable transponder
      data handling
      Buffered communication via single wire interface possible for
      easier system design
      Watchdog and Power On Reset functions
      Temperature sensor to protect the device against overheating
      20-pin Heatsink TSSOP (HTSSOP) package

      Benefits
      Reduced system cost through high level of integration
      Facilitated system design and shorter time to market
      Low power consumption