NCV7471(A) is a System Basis Chip (SBC) integrating functions

typically found in automotive Electronic Control Units (ECUs) in the

body domain. NCV7471 provides and monitors the low−voltage

power supplies for the application microcontroller and other loads,

monitors the application software via a watchdog and includes

high−speed CAN and LIN transceivers allowing the ECU to host

multiple communication nodes or to act as a gateway unit. The

on−chip state controller ensures safe power−up sequence and supports

low−power modes with a configurable set of features including

wakeup from the communication buses or by a local digital signal

WU. The status of several NCV7471(A) internal blocks can be read by

the microcontroller through the serial peripheral interface or can be

used to generate an interrupt request.

Features

• Control Logic

♦ Ensures safe power−up sequence and the correct reaction to

different supply conditions

♦ Controls mode transitions including the power management and

wakeup treatment − bus wakeups, local wakeups (via WU pin) and

cyclic wakeups (through the on−chip timer)

♦ Generates reset and interrupt requests

• Serial Peripheral Interface

♦ Operates with 16−bit frames

♦ Ensures communication with the ECU’s microcontroller unit

♦ Mode settings, chip status feedback and watchdog are accessible

through eight twelve−bits registers

• 5 V VOUT Supply from a DC/DC Converter

♦ Can deliver up to 500 mA with accuracy of ±2

♦ Supplies typically the ECU’s microcontroller

• 5 V VOUT2 Low−drop Output Regulator

♦ Can supply external loads – e.g. sensors

♦ Controlled by SPI and the state machine

♦ Protected against short to the car battery

• A High−speed CAN Transceiver

♦ ISO11898−2 and ISO11898−5 compliant

♦ Communication speed up to 1 Mbps

♦ TxD dominant time−out protection

• Two LIN Transceivers

♦ LIN2.X and J2602 compliant

♦ TxD dominant time−out protection

• Wakeup Input WU

♦ Edge−sensitive high−voltage input

♦ Can be used as a wake−up source or as a logical

input polled through SPI

• Protection and Monitoring Functions

♦ Monitoring of the main supply through the V_MID

point

♦ Monitoring of VOUT supply output with

programmable threshold

♦ VOUT2 supply diagnosis through SPI and interrupt

♦ Thermal warning and thermal shutdown protection

♦ Programmable watchdog monitoring the ECU

software

• 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