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NCV7420D25R2G Datasheet(PDF) 6 Page - ON Semiconductor |
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NCV7420D25R2G Datasheet(HTML) 6 Page - ON Semiconductor |
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6 / 16 page  NCV7420 http://onsemi.com 6 disabled and the slave internal termination resistor of 30 k W between LIN and Vbb is disconnected in order to minimize current consumption. Only a pull−up current source between Vbb and LIN is active. Sleep Mode The Sleep Mode provides extreme low current consumption. This mode is entered when both EN and STB pins are LOW coming from normal mode. The internal termination resistor of 30 k W between LIN and Vbb is disconnected and also the Vcc regulator is switched off to minimize current consumption. Wake−up NCV7420 has two possibilities to wake−up from sleep or stand−by mode (see Figure 3): • Local wake−up: enables the transition from sleep mode to stand−by mode • Remote wake−up via LIN: enables the transition from sleep− to stand−by mode and can be also detected when already in standby mode. A local wake−up is only detected in sleep mode if a transition from LOW to HIGH or from HIGH to LOW is seen on the wake pin. Wake t V BB Detection of Local Wake−Up Sleep Mode Stand−by Mode 50% V BB typ. Wake t V BB Detection of Local Wake−Up Sleep Mode Stand−by Mode 50% V BB typ. Figure 4. Local Wake−up Signal A remote wake−up is only detected if a combination of (1) a falling edge at the LIN pin (transition from recessive to dominant) is followed by (2) a dominant level maintained for a time period > tWAKE and (3) again a rising edge at pin LIN (transition from dominant to recessive) happens. LIN recessive level LIN t t WAKE 40% Vbb Detection of Remote Wake−Up V BB 60% Vbb Sleep Mode Stand−by Mode LIN dominant level Figure 5. Remote Wake−up Behavior The wake−up source is distinguished by pin RxD in the stand−by mode: • RxD remains HIGH after power−up or local wake−up. • RxD is kept LOW until normal mode is entered after a remote wake−up (LIN). |
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Similar Description - NCV7420D25R2G |
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