Datasheet

ST485
4/13
DRIVER SWITCHING CHARACTERISTICS
(V
CC
=5V± 5%, T
A
=T
MIN
to T
MAX
, unless otherwise specified. Typical values are referred to T
A
=25°C)
(See Note 1)
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground
unless specified.
RECEIVER SWITCHING CHARACTERISTICS
(V
CC
=5V± 5%, T
A
=T
MIN
to T
MAX
, unless otherwise specified. Typical values are referred to T
A
= 25°C)
(See Note 1)
Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground
unless specified.
Symbol Parameter Test Conditions
Value
Unit-40 to 85 °C -55 to 125 °C
Min. Typ. Max. Min. Max.
t
PLH
t
PHL
Propagation Delay Input
to Output
R
DIFF
=54Ω C
L1
=C
L2
= 100pF
(See Fig. 3 and 5)
10 30 60 70 ns
t
SK
Output Skew to Output R
DIFF
=54Ω C
L1
=C
L2
= 100pF
(See Fig. 3 and 5)
510 10ns
t
TLH
t
THL
Rise or Fall Time R
DIFF
=54Ω C
L1
=C
L2
=
100pF
(See Fig. 3 and 5)
31540345ns
t
PZH
Output Enable Time C
L
= 100pF S2 = Closed
(See Fig. 4 and 6)
70 90 90 ns
t
PZL
Output Enable Time C
L
= 100pF S1 = Closed
(See Fig. 4 and 6)
70 90 90 ns
t
PLZ
Output Disable Time C
L
= 15pF S1 = Closed
(See Fig. 4 and 6)
70 90 90 ns
t
PHZ
Output Disable Time C
L
= 15pF S2 = Closed
(See Fig. 4 and 6)
70 90 90 ns
Symbol Parameter Test Conditions
Value
Unit-40 to 85 °C -55 to 125 °C
Min. Typ. Max. Min. Max.
t
PLH
t
PHL
Propagation Delay Input
to Output
R
DIFF
=54Ω C
L1
=C
L2
=
100pF
(See Fig. 3 and 7)
20 130 210 230 ns
t
SKD
Differential Receiver
Skew
R
DIFF
=54Ω C
L1
=C
L2
=
100pF
(See Fig. 3 and 7)
13 ns
t
PZH
Output Enable Time C
RL
= 15pF S1 = Closed
(See Fig. 2 and 8)
20 50 56 ns
t
PZL
Output Enable Time C
RL
= 15pF S2 = Closed
(See Fig. 2 and 8)
20 50 56 ns
t
PLZ
Output Disable Time C
RL
= 15pF S1 = Closed
(See Fig. 2 and 8)
20 50 56 ns
t
PHZ
Output Disable Time C
RL
= 15pF S2 = Closed
(See Fig. 2 and 8)
20 50 56 ns
f
MAX
Maximum Data Rate 2.5 2.5 Mbps