Datasheet

ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Rev. A | Page 6 of 20
V
CC
= 3.3 V, T
A
= 25°C.
Table 5. ADM3490E/ADM3491E
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
MAXIMUM DATA RATE 12 15 Mbps
DIFFERENTIAL OUTPUT DELAY t
DD
1 22 35 ns R
L
= 60 Ω (see Figure 10)
DIFFERENTIAL OUTPUT TRANSITION TIME t
TD
3 11 25 ns R
L
= 60 Ω (see Figure 10)
PROPAGATION DELAY
From Low to High Level t
PLH
7 23 35 ns R
L
= 27 Ω (see Figure 11)
From High to Low Level t
PHL
7 23 35 ns R
L
= 27 Ω (see Figure 11)
|t
PLH
− t
PHL
| PROPAGATION DELAY SKEW
1
t
PDS
−1.4 ±8 ns R
L
= 27 Ω (see Figure 11)
ENABLE/DISABLE TIMING (ADM3491E ONLY)
Enable Time to Low Level t
PZL
42 90 ns R
L
= 110 Ω (see Figure 13)
Enable Time to High Level t
PZH
42 90 ns R
L
= 110 Ω (see Figure 12)
Disable Time from Low Level t
PLZ
35 80 ns R
L
= 110 Ω (see Figure 13)
Disable Time from High Level t
PHZ
35 80 ns R
L
= 110 Ω (see Figure 12)
Enable Time from Shutdown to Low Level t
PSL
650 900 ns R
L
= 110 Ω (see Figure 13)
Enable Time from Shutdown to High Level t
PSH
650 900 ns R
L
= 110 Ω (see Figure 12)
1
Measured on |t
PLH
(Y) − t
PHL
(Y)| and |t
PLH
(Z) − t
PHL
(Z)|.
RECEIVER TIMING SPECIFICATIONS
V
CC
= 3.3 V, T
A
= 25°C.
Table 6. ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
PROPAGATION DELAY
From Low to High Level t
RPLH
ADM3486E/ADM3490E/ADM3491E 25 62 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
ADM3483E/ADM3488E 25 75 120 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
From High to Low Level t
RPHL
ADM3486E/ADM3490E/ADM3491E 25 62 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
ADM3483E/ADM3488E 25 75 120 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
|t
RPLH
− t
RPHL
| PROPAGATION DELAY SKEW t
RPDS
ADM3486E/ADM3490E/ADM3491E +6 ±10 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
ADM3483E/ADM3488E +12 ±20 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 14)
ENABLE/DISABLE TIMING (ADM3483E/ADM3486E/
ADM3491E ONLY)
Enable Time to Low Level t
RPZL
25 50 ns C
L
= 15 pF (see Figure 15)
Enable Time to High Level t
RPZH
25 50 ns C
L
= 15 pF (see Figure 15)
Disable Time from Low Level t
RPLZ
25 45 ns C
L
= 15 pF (see Figure 15)
Disable Time from High Level t
RPHZ
25 45 ns C
L
= 15 pF (see Figure 15)
Enable Time from Shutdown to Low Level t
RPSL
720 1400 ns C
L
= 15 pF (see Figure 15)
Enable Time from Shutdown to High Level t
RPSH
720 1400 ns C
L
= 15 pF (see Figure 15)
Time to Shutdown
1
t
SHDN
80 190 300 ns
1
The transceivers are put into shutdown mode by bringing the
RE
high and the DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to
enter shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.