Datasheet

ST3485EB, ST3485EC, ST3485EI, ST3485EIY
Electrical characteristics
DocID9102 Rev 11
9/24
Table 11: Receiver 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
t
RPLH
, t
RPHL
Propagation delay
V
ID
= 0 V to 3 V, C
L
= 15 pF (Figure 13
and Figure 14)
—
30
50
ns
t
RPDS
|t
RPLH
- t
RPHL
| receiver
propagation delay skew
V
ID
= 0 V to 3 V, C
L
= 15 pF (Figure 13
and Figure 14)
1
3
t
PRZL
Receiver output enable
time to low level
C
L
= 15 pF (Figure 15 and Figure 17)
10
20
t
PRZH
Receiver output enable
time to high level
C
L
= 15 pF (Figure 15 and Figure 16)
10
20
t
PRHZ
Receiver output disable
time from high level
C
L
= 15 pF (Figure 15 and Figure 18)
10
20
t
PRLZ
Receiver output disable
time from low level
C
L
= 15 pF (Figure 15 and Figure 19)
10
20
t
PRSH
Receiver output enable
time from shutdown to
high level
C
L
= 15 pF (Figure 15 and Figure 16)
10
20
t
PRSL
Receiver output enable
time from shutdown to
low level
C
L
= 15 pF (Figure 15 and Figure 17)
20
40
µs
Notes:
1. ∆V
OD
and ∆V
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes
state.
2. Measured on |t
PLH
(A) - t
PHL
(A)| and |t
PLH
(B) - t
PHL
(B)|.
3. The transceivers are put into shutdown by bring RE high and DE low. If the input are
in state for less than 80 ns, the part are guaranteed not to enter shutdown. If the inputs are
in this state for at least 300 ns, the parts are guaranteed to have entered shutdown.