onsemi NCV7420D23R2G

The NCV7420 is a fully featured local interconnect network (LIN) transceiver designed to interface between a LIN protocol controller and the physical bus. The transceiver is implemented in I3T technology enabling both high−voltage analog circuitry and digital functionality to co−exist on the same chip. The NCV7420 LIN device integrates a LIN v2.0/2.1 physical transceiver and either a 3.3 V or a 5 V voltage regulator. The LIN bus is designed to communicate low rate data from control devices such as door locks, mirrors, car seats, and sunroofs at the lowest possible cost. The bus is designed to eliminate as much wiring as possible and is implemented using a single wire in each node. Each node has a slave MCU−state machine that recognizes and translates the instructions specific to that function. The main attraction of the LIN bus is that all the functions are not time critical and usually relate to passenger comfort. LIN is a serial communication protocol that efficiently supports the control of mechatronic nodes in distributed automotive applications. The domain is class−A multiplex buses with a single master node and a set of slave nodes. NCV7420 is designed as a master or slave node for the LIN communication interface with an integrated 3.3 V or 5 V voltage regulator having a current capability up to 50 mA for supplying any external components (microcontroller). NCV7420 contains the LIN transmitter, LIN receiver, voltage regulator, power−on−reset (POR) circuits and thermal shutdown (TSD). The LIN transmitter is optimized for the maximum specified transmission speed of 20 kBaud with EMC performance due to reduced slew rate of the LIN output. The junction temperature is monitored via a thermal shutdown circuit that switches the LIN transmitter and voltage regulator off when temperature exceeds the TSD trigger level. NCV7420 has four operating states (normal mode, low slope mode, standby mode, and sleep mode) that are determined by the input signals EN, WAKE, STB, and TxD.

• LIN compliant to specification revision 2.0 and 2.1 (backward compatible to version 1.3) and J2602
• I3T high voltage technology
• Bus voltage ±45 V
• Transmission rate up to 20 kBaud
• Thermal shutdown
• Indefinite short−circuit protection on pins LIN and WAKE towards supply and ground
• Load dump protection (45 V)
• Bus pins protected against transients in an automotive environment
• System ESD protection level for LIN, WAKE and VBB up to ±12 kV
• Output voltage 5 V / ~50 mA or 3.3 V / ~50 mA
• Wake−up input
• Enable inputs for standby and sleep mode
• INH output for auxiliary purposes (switching of an external pull−up or resistive divider towards battery, control of an external voltage regulator etc.)
• Integrated slope control
• Meets most demanding EMS/EME requirements
• Normal mode: LIN communication in either low (up to 10 kBaud) or normal slope
• Sleep mode: VCC is switched “off” and no communication on LIN bus
• Standby mode: VCC is switched “on” but there is no communication on LIN bus
• Wake−up bringing the component from sleep mode into standby mode is possible either by LIN command or digital input signal on WAKE pin. Wake−up from LIN bus can also be detected and flagged when the chip is already in standby mode.
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant