ST3485E STMicroelectronics, ST3485E Datasheet - Page 8

• Manufacturer Part Number: ST3485E
• Description: TRASMIT AT UP TO 12MBPS TRUE RS-485/RS-422 TRANSCEIVER
• Manufacturer: STMicroelectronics

Electrical characteristics
Table 11.
Note:
8/22
t
t
Symbol
ZH(SHDN)
ZL(SHDN)
t
RPDS
t
t
t
t
t
t
PZH
PHZ
PLH
PHL
PZL
PLZ
1
2
3
Propagation delay
|t
delay skew
Output enable time
Output enable time
Output disable time
Output disable time
Receiver enable from
shutdown to output high
Receiver enable from
shutdown to output low
Receiver switching characteristics
V
to T
state.
Measured on |t
The transceivers are put into shutdown by bring RE high and DE low. If the input are in state
for less than 80ns, the part are guaranteed not to enter shutdown. If the inputs are in this
state for at least 300ns, the parts are guaranteed to have entered shutdown.
PLH -
CC
V
OD
a
= 3V to 3.6V, T
= 25°C)
t
PHL
Parameter
and V
| Propagation
OC
PLH
are the changes in V
(A)-t
A
= -40 to 85°C, unless otherwise specified. Typical values are referred
PHL
V
(Figure 12.
V
(Figure 12.
C
C
C
C
C
C
ID
ID
RL
RL
RL
RL
RL
RL
(A)| and |t
=0V to 3V, C
=0V to 3V, C
= 15pF,
= 15pF,
= 15pF,
= 15pF,
= 15pF,
= 15pF,
Test Conditions
and
and
(Figure 14.
(Figure 14.
(Figure 14.
(Figure 14.
(Figure 14.
(Figure 14.
PLH
OD
Figure
Figure
L1
L1
(B)-t
and V
= 15pF
= 15pF
PHL
13.)
13.)
and
and
and
and
and
and
OC
(B)|
, respectively, when the DI input changes
Figure
Figure
Figure
Figure
Figure
Figure
18.)
18.)
18.)
18.)
18.)
18.)
Min.
Typ.
30
10
10
10
10
10
20
1
Max.
50
20
20
20
20
20
40
3
ST3485E
Unit
ns
ns
ns
ns
ns
ns
ns
µs