TJA1020(2002) データシートの表示（PDF） - Philips Electronics

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TJA1020
(Rev.:2002)

LIN transceiver

Philips Electronics 

Philips Semiconductors

LIN transceiver

Product specification

TJA1020

FUNCTIONAL DESCRIPTION

The TJA1020 is the interface between the LIN master/slave protocol controller and the physical bus in a Local

Interconnect Network (LIN). The LIN transceiver is optimized for the maximum specified LIN transmission speed of

20 Kbaud providing optimum EMC performance due to wave shaping of the LIN output.

Operating modes

The TJA1020 provides two modes of normal operation, one intermediate mode and one very low power mode. Figure 3

shows the state diagram.

handbook, full pagewidth

STANDBY

INH = HIGH

TERM. = 30 kΩ

RXD = LOW

trx OFF

t(NSLP = 1; after 0−>1) > tgotonorm

and TXD = 0

t(NSLP = 1; after 0−>1) > tgotonorm

and TXD = 1

(t(NWAKE = 0; after 1−>0) > tNWAKE

or

t(LIN = 0; after 1−>0) > tBUS)

and NSLP = 0

NORMAL

SLOPE MODE

INH = HIGH

TERM. = 30 kΩ

RXD = LINDATA

trx ON

t(NSLP = 0; after 1−>0)

> tgotosleep

and no

wake-up event

t(NSLP = 1; after 0−>1) > tgotonorm

and TXD = 1

LOW

SLOPE MODE

INH = HIGH

TERM. = 30 kΩ

RXD = LINDATA

trx ON

t(NSLP = 0; after 1−>0) > tgotosleep

and no wake-up event

t(NSLP = 1; after 0−>1) > tgotonorm

and TXD = 0

SLEEP

INH = FLOATING

TERM. =

HIGH-OHMIC

RXD = FLOATING

trx OFF

switching on BAT

MGU243

trx: transmitter.

TERM.: slave termination resistor, connected between pins LIN and BAT.

Fig.3 State diagram.

2002 Jul 17

4

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