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Rs
CANH
CANH
D
10%
90%
0.9V
0 V
0.5V
(see Note A)
+
_
R
L
=
60  +1%
C
L
=
50 pF +20%
(see Note B)
V
O
V
I
V
I(Rs)
t
PLH
t
PHL
V
CC
V
O(D)
V
O(R)
t
f
t
r
V
I
V
O
V
CC/2
V
CC/2
CANH
CANL
R
V
ID
I
O
V
O
V
I(CANH)
V
I(CANL)
V
I(CANH) +
V
I(CANL)
2
V
IC
=
1.5 V
CANH
CANL
R
(see Note A)
2 V
2.4 V
3.5 V
10%
90%
1.5 V
10%
V
O
C
L
= 15 pF
+20% (see Note B)
I
O
V
I
0.7 V
CC
0.3 V
CC
V
OH
V
OL
t
PLH
t
PHL
t
f
t
r
V
I
V
O
SN65HVD251-Q1
SLLS788 – APRIL 2007
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 4. Driver Test Circuit and Voltage Waveforms
Figure 5. Receiver Voltage and Current Definitions
A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 125 kHz, 50% duty cycle,
t
r
≤ 6ns, t
f
≤ 6 ns, Z
O
= 50 Ω .
B. C
L
includes instrumentation and fixture capacitance within ± 20%.
Figure 6. Receiver Test Circuit and Voltage Waveforms
8
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