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 57 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
[1] V
cm
is the BP/BM common mode voltage, (V
BP
+V
BM
)/2, and is specified in conditions column for parameters V
IH(dif)
and V
IL(dif)
for pins
BP and BM; see Table 14
. V
cm
is tested on a receiving bus driver with a transmitting bus driver that has a ground offset voltage in the
range 12.5 V to +12.5 V and transmits a 50/50 pattern.
[2] Min: V
o(idle)(BP)
=V
o(idle)(BM)
= 0.4V
BUF
= 0.4  4.5 V = 1800 mV; max value: V
o(idle)(BP)
=V
o(idle)(BM)
= 0.6V
BUF
= 0.6 5.25 V = 3150 mV;
the nominal voltage is 2500 mV.
[3] The nominal voltage is 0 mV.
[4] When undervoltage on V
IO
[5] When V
CC
=V
BAT
=V
BUF
=0V.
dStarTSSLengthChange_TxD_Bus 450 0 ns (t
det(act)(TXEN)
+ t
det(act)(TRXD)
) 250 - ns
t
det(act)(TXEN)
- 20 ns
dStarFES1LengthChange_TxD_Bus 0 450 ns t
det(idle)(TXEN)
20 - ns
t
det(idle)(TXEN)
+ t
det(idle)(TRXD)
-250ns
dStarSymbolLengthChange_TxD_Bus 300 +400 ns t
det(act-idle)(TXEN)
+
t
det(act-idle)(TRXD)
75 +75 ns
dStarTSSLengthChange_Bus_RxD 450 0 ns (t
det(act)(bus)
+ t
det(act)(TRXD)
) 410 - ns
t
det(act)(bus)
- 100 ns
dStarFES1LengthChange_Bus_RxD 0 450 ns t
det(idle)(bus)
100 - ns
t
det(idle)(bus)
+ t
det(idle)(TRXD)
-400ns
dStarSymbolLengthChange_Bus_RxD 300 +400 ns t
det(act-idle)(bus)
+
t
det(act-idle)(TRXD)
100 +100 ns
dStarActivityDetection 100 250 ns t
det(act)(bus)
100 210 ns
dStarIdleDetection 50 200 ns t
det(idle)(bus)
100 200 ns
|dStarRxD
R15
- dStarRxD
F15
|-5nst
(r-f)
 (pin RXD) - 5 ns
dStarTxActiveMax 650 2600 st
detCL(TXEN)
650 2600 s
dStarTx
reaction
-75nst
det(idle)(TXEN)
20 50 ns
Active Star with host interface
dStarModeChange
SPI
-100st
t(moch)
-25s
dStarReactionTime
SPI
-200st
det(int)
-100s
uV
DIG-OUT-HIGH
80 100 % V
OH
(pin SDO) V
IO

0.4
V
IO
V
uV
DIG-OUT-LOW
-20%V
OL
(pins SDO, INTN) - 0.4 V
uV
DIG-IN-HIGH
-70%V
IH
(pins SDI, SCSN, SCLK) 0.7V
IO
5.5 V
uV
DIG-IN-LOW
30 - % V
IL
(pins SDI, SCSN, SCLK) 0.3 0.3V
IO
V
Functional class: Active Star - host interface implemented
SPI 0.01 1 Mbit/s t
cl(clk)
0.5 100 s
uV
DIG-OUT-UV
-500mVV
O
(pins SDO, INTN)
[4]
-500mV
uV
DIG-OUT-OFF
product specific V
O
(pins SDO, INTN)
[5]
-500mV
behavior when SCK not connected pull-down behavior on SCLK
behavior when SDI not connected pull-down behavior on SDI
behavior when SCSN not connected pull-up behavior on SCSN
Table 18. EPL 3.0.1 to TJA1085 conversion
…continued
EPL 3.0.1 TJA1085
Symbol Min Max Unit Symbol Min Max Unit