Datasheet

Electrical characteristics ST485B - ST485C
8/19
V
CC
= 5 V ± 5%, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are referred
to T
A
= 25 °C
Table 8. Receiver switching characteristics
Symbol Parameter Test conditions
(1)
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 Figure 4 and Figure 8)
20 130 210 230 ns
t
SKD
Differential receiver
skew
R
DIFF
=54Ω, C
L1
= C
L2
= 100pF
(See Figure 4 and Figure 8)
13 ns
t
PZH
Output enable time
C
RL
= 15pF, S1 = Closed
(See Fig. 2 and Figure 9)
20 50 56 ns
t
PZL
Output enable time
C
RL
= 15pF, S2 = Closed
(See Fig. 2 and Figure 9)
20 50 56 ns
t
PLZ
Output disable time
C
RL
= 15pF, S1 = Closed
(See Fig. 2 and Figure 9)
20 50 56 ns
t
PHZ
Output disable time
C
RL
= 15pF, S2 = Closed
(See Fig. 2 and Figure 9)
20 50 56 ns
f
MAX
Maximum data rate 2.5 2.5 Mbps
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