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PDF TJA1020_5 Data sheet ( Hoja de datos )

Número de pieza TJA1020_5
Descripción LIN transceiver
Fabricantes NXP Semiconductors 
Logotipo NXP Semiconductors Logotipo



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No Preview Available ! TJA1020_5 Hoja de datos, Descripción, Manual

INTEGRATED CIRCUITS
DATA SHEET
TJA1020
LIN transceiver
Product specification
Supersedes data of 2002 Jul 17
2004 Jan 13

1 page




TJA1020_5 pdf
Philips Semiconductors
LIN transceiver
Product specification
TJA1020
Table 1 Operating modes
MODE
Sleep
Standby(1)
Normal
slope
mode
Low slope
mode
NSLP TXD (OUTPUT)
RXD
INH TRANSMITTER
REMARKS
0 weak pull-down floating
floating off
no wake-up request detected
0 weak pull-down if LOW; note 3 HIGH off
remote wake-up;
strong pull-down if
local wake-up;
note 2
wake-up request detected; in
this mode the microcontroller
can read the wake-up source:
remote or local wake-up
1 weak pull-down HIGH:
HIGH normal slope notes 2, 3 and 4
recessive state
mode
LOW:
dominant state
1 weak pull-down HIGH:
HIGH low slope mode notes 2, 3 and 5
recessive state
LOW:
dominant state
Notes
1. The standby mode is entered automatically upon any local or remote wake-up event during sleep mode. Pin INH and
the 30 ktermination resistor at pin LIN are switched on.
2. The internal wake-up source flag (set if a local wake-up did occur and fed to pin TXD) will be reset when entering
normal slope or low slope mode (NSLP goes HIGH).
3. The wake-up interrupt (on pin RXD) is released when entering normal slope or low slope mode (NSLP goes HIGH).
4. The normal slope mode is entered during a positive edge on NSLP while pin TXD is already set HIGH. In the event
of a short-circuit to ground on pin TXD, the transmitter will be disabled.
5. The low slope mode is entered during the positive edge on NSLP while pin TXD is already pulled LOW.
Sleep mode
This mode is the most power saving mode of the TJA1020
and the default state after power-up (first battery supply).
Despite its extreme low current consumption, the TJA1020
can still be waken up remotely via pin LIN, or waken up
locally via pin NWAKE, or activated directly via pin NSLP.
Filters at the inputs of the receiver (LIN), of pin NWAKE
and of pin NSLP are preventing unwanted wake-up events
due to automotive transients or EMI. All wake-up events
have to be maintained for a certain time period (tBUS,
tNWAKE and tgotonorm).
The sleep mode is initiated by a falling edge on the pin
NSLP while TXD is already set HIGH. After a filter time
continuously driven sleep command (pin NSLP = LOW),
pin INH becomes floating.
In sleep mode the internal slave termination between
pins LIN and BAT is disabled to minimize the power
dissipation in case pin LIN is short-circuited to ground.
Only a weak pull-up between pins LIN and BAT is present.
The sleep mode can be activated independently from the
actual level on pin LIN or NWAKE. So it is guaranteed that
the lowest power consumption is achievable even in case
of a continuous dominant level on pin LIN or a continuous
LOW on pin NWAKE.
Standby mode
The standby mode is entered automatically whenever a
local or remote wake-up occurs while the TJA1020 is in its
sleep mode. These wake-up events activate pin INH and
enable the slave termination resistor at the pin LIN. As a
result of the HIGH condition on pin INH the voltage
regulator and the microcontroller can be activated.
The standby mode is signalled by a LOW level on pin RXD
which can be used as an interrupt for the microcontroller.
In the standby mode (pin NSLP is still LOW), the condition
of pin TXD (weak pull-down or strong pull-down) indicates
the wake-up source: weak pull-down for a remote wake-up
request and strong pull-down for a local wake-up request.
2004 Jan 13
5

5 Page





TJA1020_5 arduino
Philips Semiconductors
LIN transceiver
Product specification
TJA1020
SYMBOL
RSLAVE
Io(sc)
PARAMETER
slave termination
resistance to pin BAT
short-circuit output
current
Vth(rx)
Vcntr(rx)
Vthr(hys)
receiver threshold
voltage
receiver centre voltage
receiver threshold
hysteresis voltage
Thermal shutdown
Tj(sd)
shutdown junction
temperature
AC characteristics
td(TXD-BUSon/off) TXD propagation delay
failure
td(TXD-BUSon/off) TXD propagation delay
failure
td(BUSon/off-RXD) RXD propagation delay
failure
tf(slope)(dom)
fall time LIN
(100% to 0%)
tr(slope)(rec)
rise time LIN
(0% to 100%)
CONDITIONS
standby, low slope or
normal slope mode;
VLIN = 0 V; VBAT = 12 V
VLIN = VBAT = 12 V;
VTXD = 0 V; t < tdom
VLIN = VBAT = 27 V;
VTXD = 0 V; t < tdom
VBAT = 7.3 to 27 V
MIN.
20
27
60
0.4VBAT
VBAT = 7.3 to 27 V
VBAT = 7.3 to 27 V
0.475VBAT
0.145VBAT
160
normal slope mode;
CL = 10 nF; RL = 500 ;
(see Fig.5)
tPropTxDom tPropTxRec
low slope mode;
CL = 10 nF; RL = 500 ;
(see Fig.5)
tPropTxDom tPropTxRec
normal slope mode and
low slope mode; CL = 0;
RL = ; voltage on LIN
externally forced; LIN
slope time <500 ns;
CRXD = 20 pF;
RRXD = 2.4 k; (see
Fig.5)
tPropRxDom tPropRxRec
normal slope mode;
CL = 10 nF; RL = 500 ;
VBAT = 12 V; transition
from recessive to
dominant; note 4 (see
Fig.5)
normal slope mode;
CL = 10 nF; RL = 500 ;
VBAT = 12 V; transition
from dominant to
recessive; note 5 (see
Fig.5)
2
5
2
TYP.
30
MAX.
47
UNIT
k
40 60
mA
90 125
mA
0.6VBAT
V
0.5VBAT 0.525VBAT V
0.16VBAT 0.175VBAT V
175 190
°C
0 +2
µs
0 +5
µs
0 +2
µs
16 27
µs
16 27
µs
2004 Jan 13
11

11 Page







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