tja1020u-n1 NXP Semiconductors, tja1020u-n1 Datasheet - Page 4

• Manufacturer Part Number: tja1020u-n1
• Description: Lin Transceiver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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.
2004 Jan 13
handbook, full pagewidth
LIN transceiver
trx: transmitter.
TERM.: slave termination resistor, connected between pins LIN and BAT.
t (NSLP = 1; after 0
while TXD = 0
1)
t gotonorm
RXD = LINDATA
TERM. = 30 k
TERM. = 30 k
SLOPE MODE
RXD = LOW
INH = HIGH
INH = HIGH
STANDBY
trx OFF
trx ON
LOW
(t (NWAKE = 0; after 1
t (NSLP = 0; after 1
t (NSLP = 1; after 0
t (NSLP = 1; after 0
t (LIN = 0; after 1
Fig.3 State diagram.
while TXD = 1
while TXD = 1
while TXD = 0
or
4
0)
1)
1)
0)
0)
t (NSLP = 0; after 1
t gotosleep
t gotonorm
t gotonorm
t BUS )
t NWAKE
while TXD = 1
t gotosleep
RXD = FLOATING
INH = FLOATING
RXD = LINDATA
TERM. = 30 k
SLOPE MODE
HIGH-OHMIC
0)
INH = HIGH
NORMAL
TERM. =
SLEEP
trx OFF
trx ON
t (NSLP = 1; after 0
switching on BAT
while TXD = 1
Product specification
MGU243
1)
TJA1020
t gotonorm