Datasheet

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