Datasheet
TJA1085 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 23 October 2012 43 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
t
d(bus-RXD)
delay time from bus to RXD AS_Normal; see Figure 11
DATA_0 - - 75 ns
DATA_1 - - 75 ns
t
d(bus-RXD)
delay time difference from bus to
RXD
between DATA_0 and DATA_1 AS_
Normal; V
cm
= 2.5 V
[2]
[3]
5- +5ns
t
d(TRXD-RXD)
delay time from TRXD to RXD AS_Normal; see Figure 12
DATA_0 - - 60 ns
DATA_1 - - 60 ns
t
d(TRXD-RXD)
delay time difference from TRXD
to RXD
between DATA_0 and DATA_1 AS_
Normal
5- +5ns
t
d(TXD-RXD)
delay time from TXD to RXD AS_Normal; see Figure 10
[1]
DATA_0 - 3060ns
DATA_1 - 3060ns
t
d(bus-bus)
delay time from bus to bus from one branch to another
AS_Normal; see Figure 11
DATA_0 - - 100 ns
DATA_1 - - 100 ns
t
d(bus-bus)
delay time difference from bus to
bus
between DATA_0 and DATA_1 AS_
Normal
8- +8ns
Bus slope
t
r(dif)(bus)
bus differential rise time DATA_0 to DATA_1; 20 % to 80 % 6 - 18.75 ns
DATA_0 to idle; 300 mV to
30 mV
- - 30 ns
t
f(dif)(bus)
bus differential fall time DATA_1 to DATA_0; 20 % to 80 % 6 - 18.75 ns
DATA_1 to idle; 300 mV to 30 mV - - 30 ns
idle to DATA_0; 30 mV to
300 mV
- - 30 ns
t
(r-f)(dif)
difference between differential
rise and fall time
between DATA_0 and DATA_1 3- +3ns
Pin RXD
t
r
rise time 20 % to 80 % - - 9 ns
t
f
fall time 80 % to 20 % - - 9 ns
t
(r+f)
sum of rise and fall time 20 % to 80 % and 80 % to 20 % - - 13 ns
t
(r-f)
difference between rise and fall
time
20 % to 80 % 5- +5ns
Pin RSTN
t
det(rst)
reset detection time 5 - 20 s
Pin BGE
t
d(BGE-busact)
delay time from BGE to bus
active
activity detected on TXEN - - 100 ns
t
d(BGE-busidle)
delay time from BGE to bus idle activity detected on TXEN - - 100 ns
Table 15. Dynamic characteristics
…continued
All parameters are guaranteed for V
BAT
= 4.45 V to 60 V; V
CC
= 4.45 V to 5.25 V; V
BUF
= 4.45 V to 5.25 V; V
IO
= 2.55 V to
5.25 V; T
vj
=
40
C to + 150
C; R
bus
= 40
, C
bus
= 100 pF; C
RXD
= 15 pF; C
TRXD0
= C
TRXD1
= 50 pF and C
SDO
= 50 pF
unless otherwise specified. All voltages are defined with respect to ground; positive currents flow into the IC.
Symbol Parameter Conditions Min Typ Max Unit