AS8530-ASOM datasheet(21/33 Pages) AMSCO

No de pièce	AS8530-ASOM

Description	LIN Transceiver with Integrated Voltage Regulator and MCU Interface for Automotive Applications

PDF	33 Pages

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Fabricant	AMSCO [ams AG]

Site Internet	http://www.ams.com

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21 / 33 page

www.ams.com/Lin_CompanionIC/AS8530

Revision 1.1

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AS8530

Datasheet - Application In form atio n

8.4.2 Receive Mode

The data signals from the BUS pin will be transferred continuously to the pin RX. Short spikes on the bus signal are suppressed by the

implemented de-bouncing circuit. Including all tolerances the LIN specific receive threshold values of 0.4*VSUP and 0.6*VSUP will be securely

observed.

Figure 8. Receive Mode Impulse Diagram

8.5 RX and TX Interface

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

LIN bus being pulled low (dominant state) too. The TX pin has an internal active pull up connected to VCC. This guarantees that an open TX pin

generates a recessive BUS level.

Figure 9. TX Input Circuitry

t < tdeb_BUS

BUS

40%

50%

60%

Vthr_max

Vthr_min

Vthr_hys

Vthr_cnt

AS8530

VCC

MCU

RC-Filter

(10ns)

VCC

IPU_TXD

AS8530-ASOM Fiches technique(PDF) 21 Page - ams AG