Datasheet

Electrical characteristics
ST3485EB, ST3485EC, ST3485EI, ST3485EIY
8/24
DocID9102 Rev 11
Table 10: Driver switching characteristics (VCC = 3 V to 3.6 V, TA = 0 to 70 °C for
ST3485ECDR, TA = -40 to 85 °C for ST3485EBDR, TA = -40 to 125 °C for ST3485EIDT and
ST3485EIYDT, unless otherwise specified. Typical values are referred to TA = 25 °C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
D
R
Maximum data rate
12
15
Mbps
t
DD
Differential output delay
R
L
= 60 Ω, C
L
= 15 pF (Figure 5 and
Figure 6)
18
30
ns
t
TD
Differential output
transition time
R
L
= 60 Ω, C
L
= 15 pF (Figure 5 and
Figure 6)
12
20
t
PLH
t
PHL
Propagation delay
R
L
= 27 Ω, C
L
= 15 pF (Figure 9 and
Figure 10)
18
30
t
PDS
|t
PLH -
t
PHL
| driver
propagation delay skew
(1)
R
L
= 27 Ω, C
L
= 15 pF (Figure 9 and
Figure 10)
2
5
t
PZL
Output enable time
R
L
= 110 Ω (Figure 11 and Figure 12)
19
35
t
PZH
Output enable time
R
L
= 110 Ω (Figure 7 and Figure 8)
30
50
t
PHZ
Output disable time
R
L
= 110 Ω (Figure 7 and Figure 8)
19
35
t
PLZ
Output disable time
R
L
= 110 Ω (Figure 11 and Figure 12)
30
50
t
SKEW
Differential output delay
skew
1
3
t
PSH
Driver enable from
shutdown to output high
R
L
= 110 Ω (Figure 7 and Figure 8)
30
50
t
PSL
Driver enable from
shutdown to output low
R
L
= 110 Ω (Figure 11 and Figure 12)
19
35
Notes:
(1)
Measured on |t
PLH
(A)-t
PHL
(A)| and |t
PLH
(B)-t
PHL
(B)|.