ADM485
TIMING SPECIFICATIONS
V
CC
= 5 V ± 5%, all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
DRIVER
Propagation Delay Input to Output, t
PLH
, t
PHL
Driver Output to OUTPUT, t
SKEW
Driver Rise/Fall Time, t
R
, t
F
Driver Enable to Output Valid
Driver Disable Timing
Matched Enable Switching |t
ZH
− t
ZL
|
Matched Disable Switching |t
HZ
− t
LZ
|
RECEIVER
Propagation Delay Input to Output, t
PLH
, t
PHL
Skew |t
PLH
− t
PHL
|
Receiver Enable, t
ZH
, t
ZL
Receiver Disable, t
HZ
, t
LZ
Tx Pulse Width Distortion
Rx Pulse Width Distortion
1
Min
2
Typ
10
1
8
10
10
0
0
15
5
5
1
1
Max
15
5
15
25
25
2
2
30
5
20
20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 22
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 22
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 22
R
L
= 110 Ω, C
L
= 50 pF, see Figure 23
R
L
= 110 Ω, C
L
= 50 pF, see Figure 23
R
L
= 110 Ω, C
L
= 50 pF, see Figure 23
R
L
= 110 Ω, C
L
= 50 pF, see Figure 23
C
L
= 15 pF, see Figure 24
C
L
= 15 pF, see Figure 24
C
L
= 15 pF, R
L
= 1 kΩ, see Figure 25
C
L
= 15 pF, R
L
= 1 kΩ, see Figure 25
8
Guaranteed by characterization.
Rev. F | Page 4 of 16
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