Datasheet

TJA1021 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 7 — 25 March 2011 14 of 25
NXP Semiconductors
TJA1021
LIN 2.1/SAE J2602 transceiver
[1] All parameters are guaranteed over the virtual junction temperature range by design. Factory testing uses correlated test conditions to
cover the specified temperature and power supply voltage range.
[2] Not applicable for the /10 versions of the TJA1021.
[3] . Variable t
bus(rec)(min)
is illustrated in the LIN timing diagram in Figure 6.
[4] Bus load conditions are: C
BUS
= 1 nF and R
BUS
=1k; C
BUS
= 6.8 nF and R
BUS
=660; C
BUS
= 10 nF and R
BUS
= 500 .
[5] . Variable t
bus(rec)(max)
is illustrated in the LIN timing diagram in Figure 6.
[6] Load condition pin RXD: C
RXD
= 20 pF and R
RXD
=2.4k.
[7] For V
BAT
> 18 V the LIN transmitter might be suppressed. If TXD is HIGH then the LIN transmitter output is recessive.
t
r
rise time
[2][4]
- - 22.5 s
t
(r-f)
difference between rise
and fall time
V
BAT
= 7.3 V
[2][4]
5- +5s
t
tx_pd
transmitter propagation
delay
rising and falling
[2]
--6s
t
tx_sym
transmitter propagation
delay symmetry
2.5 - +2.5 s
t
rx_pd
receiver propagation
delay
rising and falling
[6]
--6s
t
rx_sym
receiver propagation
delay symmetry
[6]
2- +2s
t
wake(dom)LIN
LIN dominant wake-up
time
Sleep mode 30 80 150 s
t
wake(dom)WAKE_N
dominant wake-up time
on pin WAKE_N
Sleep mode 7 30 50 s
t
gotonorm
go to normal time time period for mode change from
Sleep, Power-on or Standby mode
into Normal mode
2510s
t
init(norm)
normal mode
initialization time
5- 20s
t
gotosleep
go to sleep time time period for mode change from
Normal slope mode into Sleep mode
2510s
t
to(dom)TXD
TXD dominant time-out
time
V
TXD
=0 V 275590ms
Table 8. Dynamic characteristics …continued
V
BAT
= 5.5 V to 18 V; T
vj
=  40  C to +150  C; R
L(LIN-VBAT)
= 500  ; all voltages are defined with respect to ground; positive
currents flow into the IC; typical values are given at V
BAT
= 12 V; see Figure 6; unless otherwise specified.
[1]
Symbol Parameter Conditions Min Typ Max Unit
1 3
t
bus recmin
2t
bit

-------------------------------
=
2 4
t
bus recmax
2t
bit

--------------------------------
=