3 .3 V-P o w e re d , 1 0 Mb p s a n d S le w -Ra t e -Lim it e d
Tru e RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs
3.0V
OUT
V
ID
R
IN
1.5V
1.5V
GENERATOR
(NOTE 4)
50Ω
C = 15pF
L
0V
(NOTE 5)
t
t
RPHL
RPLH
V
CC
1.5V
0V
V
OM
V
OM
OUT
V
2
CC
V
OM
=
0V
Figure 11. Receiver Propagation Delay
S1
S2
S3
1.5V
1k
V
CC
-1.5V
V
ID
R
C
L
(NOTE 5)
GENERATOR
(NOTE 4)
50Ω
3V
0V
3V
0V
S1 OPEN
S2 CLOSED
S3 = 1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
IN
IN
1.5V
1.5V
t
t
PRZL
PRZH
t
t
PRSH
PRSL
V
OH
V
CC
OUT
OUT
1.5V
1.5V
0V
V
OL
3V
0V
3V
0V
S1 OPEN
S2 CLOSED
S3 = 1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
IN
IN
1.5V
1.5V
t
PRHZ
t
PRLZ
V
OH
V
CC
OUT
0.25V
0.25V
OUT
0V
V
OL
Figure 12. Receiver Enable and Disable Times
Note 4: The input pulse is supplied by a generator with the following characteristics: PRR = 250kHz, 50% duty cycle, t ≤ 6.0ns, Z = 50Ω.
r
O
Note 5: C includes probe and stray capacitance.
5680/MAX3491
L
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
