NCV7381(2012) Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

NCV7381
(Rev.:2012)

FlexRay® Bus Driver

ON Semiconductor 

STBN

EN

Normal

Mode

Receive−Only

Mode

NCV7381

Standby

Mode

Go−to−sleep

Mode

Sleep

Mode

Normal

Mode

ERRN Error Flag

Error Flag

Wake Flag

Wake Flag

Error Flag

dGo−to−sleep

dBDModeChange

dBDModeChange dBDModeChange

dBDModeChange

Figure 4. Timing Diagram of Operating Modes Control by the STBN and EN Pins

Power Supplies and Power Supply Monitoring

NCV7381 is supplied by three pins. VBAT is the main

supply both for NCV7381 and the full electronic module.

VBAT will be typically connected to the automobile battery

through a reverse−polarity protection. VCC is a 5 V

low−voltage supply primarily powering the FlexRay bus

driver core in a normal−power mode. VIO supply serves to

adapt the logical levels of NCV7381 to the host and/or the

FlexRay communication controller digital signal levels. All

supplies should be properly decoupled by filtering

capacitors − see Figure 2 and Table 2.

All three supplies are monitored by under−voltage

detectors with individual thresholds and filtering times both

for under−voltage detection and recovery – see Table 18.

Logic Level Adaptation

Level shift input VIO is used to apply a reference voltage

uVDIG = uVIO to all digital inputs and outputs in order to

adapt the logical levels of NCV7381 to the host and/or the

FlexRay communication controller digital signal levels

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