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AS8520

Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Figure 8. Receive Mode Impulse Diagram

8.5 RX and TX Interface

8.5.1 Input TX

The 5V input TX controls directly the BUS level. LIN Transmitter acts like a slew-controlled level shifter. A dominant state (low) on TX leads to the

generates a recessive BUS level.

Figure 9. TX Input Circuitry

8.5.2 Output RX

The received BUS signal will be output to the RX pin:

BUS < Vthr_cnt – 0.5 * Vthr_hys

→ RX = low

BUS > Vthr_cnt + 0.5 * Vthr_hys

→ RX = high

RX

BUS

50%

60%

40%

AS8520

VCC

MCU

RC-Filter

(10ns)

VCC

TX