ST485ER STMicroelectronics, ST485ER Datasheet - Page 7

• Manufacturer Part Number: ST485ER
• Description: Low power RS-485/RS-422 transceiver
• Manufacturer: STMicroelectronics

ST485ER
4.2
Table 6.
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are
2. Supply current specification is valid for loaded transmitters when V
3. Applies to peak current. See typical Operating Characteristics.
Driver switching characteristics
V
to T
Table 7.
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are
Symbol
Symbol
CC
I
I
I
OSD1
OSD2
I
OSR
t
t
t
t
t
C
t
t
referenced to device ground unless specified.
t
referenced to device ground unless specified.
t
PZH
PHZ
CC
PLH
TLH
THL
PZL
PLZ
A
PHL
SK
AB
= 5V ± 5%, T
= 25°C
No load supply current
Driver short-circuit current,
V
Driver short-circuit current,
V
Receiver short-circuit
current
Propagation Delay Input
to Output
Output Skew to Output
Rise or Fall Time
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
Output AB Capacitance
O
O
=High
=Low
DC Electrical characteristics
Driver switching characteristics
Parameter
Parameter
A
= T
MIN
to T
(2)
MAX
R
(See
R
(See
R
(See
C
(See
C
(See
C
(See
C
(See
, unless otherwise specified. Typical values are referred
V
V
V
V
V
V
DIFF
DIFF
DIFF
L
L
L
L
RE
DE
DE
O
O
O
= 100pFS2 = Closed
= 100pFS1 = Closed
= 15pFS1 = Closed
= 15pFS2 = Closed
= -7 to 12V
= -7 to 12V
= 0V to V
Figure 4.
Figure 4.
Figure 4.
Figure 5.
Figure 5.
Figure 5.
Figure 5.
= 0V or V
= V
= 0V
= 54ΩC
= 54ΩC
= 54ΩC
Test conditions
Test conditions
CC
L1
L1
L1
CC
and
and
and
and
and
and
and
CC
= C
= C
= C
(3)
(3)
Figure 6.
Figure 6.
Figure 6.
Figure 7.
Figure 7.
Figure 7.
Figure 7.
L2
L2
L2
= 100pF
= 100pF
= 100pF
DE
(1)
(1)
= 0V
)
)
)
)
)
)
)
Electrical characteristics
Min.
Min.
35
35
7
10
3
Typ.
400
300
Typ.
30
15
70
70
70
70
43
5
Max.
Max.
900
500
250
250
95
60
10
40
90
90
90
90
Unit
Unit
mA
mA
mA
µA
µA
pF
ns
ns
ns
ns
ns
ns
ns
7/19