NCV7471, NCV7471A System Basis Chip with a High-Speed CAN, Two LINs and a Boost-Buck DC/DC Converter www.onsemi.com NCV7471(A) is a System Basis Chip (SBC) integrating functions typically found in automotive Electronic Control Units (ECUs) in the SSOP36EP body domain. NCV7471 provides and monitors the lowvoltage DQ SUFFIX power supplies for the application microcontroller and other loads, CASE 940AB monitors the application software via a watchdog and includes highspeed CAN and LIN transceivers allowing the ECU to host multiple communication nodes or to act as a gateway unit. The MARKING DIAGRAM onchip state controller ensures safe powerup sequence and supports lowpower modes with a configurable set of features including wakeup from the communication buses or by a local digital signal XXXX WU. The status of several NCV7471(A) internal blocks can be read by AWLYYWW the microcontroller through the serial peripheral interface or can be used to generate an interrupt request. Features Control Logic XXXX = NCV74715 or NCV7471A5 Ensures safe powerup sequence and the correct reaction to A = Assembly Location different supply conditions WL = Wafer Lot YY = Year Controls mode transitions including the power management and WW = Work Week wakeup treatment bus wakeups, local wakeups (via WU pin) and = PbFree Package cyclic wakeups (through the onchip timer) (Note: Microdot may be in either location) Generates reset and interrupt requests Serial Peripheral Interface ORDERING INFORMATION Operates with 16bit frames See detailed ordering and shipping information on page 49 of Ensures communication with the ECUs microcontroller unit this data sheet. Mode settings, chip status feedback and watchdog are accessible through eight twelvebits registers Can be used as a wakeup source or as a logical 5 V VOUT Supply from a DC/DC Converter input polled through SPI Can deliver up to 500 mA with accuracy of 2% Protection and Monitoring Functions Supplies typically the ECUs microcontroller Monitoring of the main supply through the V MID 5 V VOUT2 Lowdrop Output Regulator point Can supply external loads e.g. sensors Monitoring of VOUT supply output with Controlled by SPI and the state machine programmable threshold Protected against short to the car battery VOUT2 supply diagnosis through SPI and interrupt A Highspeed CAN Transceiver Thermal warning and thermal shutdown protection ISO118982 and ISO118985 compliant Programmable watchdog monitoring the ECU Communication speed up to 1 Mbps software TxD dominant timeout protection NCV Prefix for Automotive and Other Applications Two LIN Transceivers Requiring Unique Site and Control Change LIN2.X and J2602 compliant Requirements AECQ100 Qualified and PPAP TxD dominant timeout protection Capable Wakeup Input WU These Devices are PbFree, Halogen Free/BFR Free Edgesensitive highvoltage input and are RoHS Compliant Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: April, 2018 Rev. 5 NCV7471/DNCV7471, NCV7471A 1 36 V MID RSTN INTN BOOST CFG UVN VOUT SDI FSO1 FSO2 SCK SDO FSO3 GND SMPS CSN BUCK WU VS GND SENSE VOUT VS VOUT2 VCC CAN GND VOUT2 CANH TxDC CANL RxDC TEST/GND TxDL1 LIN1 RxDL1 GND TxDL2 LIN2 SWDM RxDL2 18 19 Pin Connections Table of Contents Block Diagram .............................................................................................. 3 Pin Description .............................................................................................. 4 Application Information ....................................................................................... 5 Example Application Diagram .................................................................................. 5 External Components ......................................................................................... 6 Functional Description ........................................................................................ 7 Power Supplies .............................................................................................. 7 Communication Transceivers .................................................................................. 10 WU Local Wakeup Input ................................................................................... 14 Operating Modes ........................................................................................... 15 Watchdog ................................................................................................. 19 System Reset .............................................................................................. 21 Event Flags and Interrupt Requests ............................................................................. 22 Junction Temperature Monitoring .............................................................................. 25 FSO1/2/3 Fail-Safe Outputs ................................................................................. 25 SWDM and CFG Digital Inputs ................................................................................ 27 SPI Serial Peripheral Interface ............................................................................... 28 Absolute Maximum Ratings .................................................................................. 38 Operating Ranges ........................................................................................... 39 Electrical Characteristics ..................................................................................... 40 Power Supply .............................................................................................. 40 CAN Transceiver ........................................................................................... 43 LIN Transceivers ........................................................................................... 45 Digital Control Timing and SPI Timing .......................................................................... 47 Thermal Protection .......................................................................................... 48 Digital IO Pins ............................................................................................. 48 CFG and SWDM Pins ....................................................................................... 49 FSO Pins ................................................................................................. 49 WU Pin ................................................................................................... 49 Device Ordering information .................................................................................. 49 www.onsemi.com 2