ST485 ST Microelectronics, ST485 Datasheet - Page 7

• Manufacturer Part Number: ST485
• Description: Low power RS-485/RS-422 transceiver
• Manufacturer: ST Microelectronics

ST485
Table 5.
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device
2. Supply current specification is valid for loaded transmitters when V
3. Applies to peak current. See typical Operating Characteristics.
4.1
Table 6.
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device
Symbol
Symbol
I
I
I
OSD1
OSD2
t
t
I
OSR
t
t
t
t
t
ground unless specified.
t
ground unless specified.
t
CC
PLH
TLH
THL
PZH
PZL
PLZ
PHZ
PHL
SK
No Load Supply Current
(2)
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
DC Electrical characteristics
Driver switching characteristics
V
to T
Driver switching characteristics
CC
Parameter
Parameter
A
= 5V ± 5%, T
= 25°C
O
O
=High
=Low
A
= T
R
(See
R
(See
R
(See
C
(See
C
(See
C
(See
C
(See
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
MIN
= -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
to T
CC
MAX
L1
L1
L1
CC
and
and
and
and
and
and
and
CC
= C
= C
= C
(3)
(3)
, unless otherwise specified. Typical values are referred
Figure
Figure
Figure
Figure
Figure
Figure
Figure
L2
L2
L2
= 100pF
= 100pF
= 100pF
(1)
(1)
6.)
6.)
6.)
7.)
7.)
7.)
7.)
DE
= 0V
Min
35
35
Min.
7
10
3
-40 to 85 °C
-40 to 85 °C
Typ
400
300
Typ. Max.
30
15
70
70
70
70
5
Electrical characteristics
Value
Max
900
500
250
250
Value
95
60
10
40
90
90
90
90
-55 to 125 °C
-55 to 125°C
Min
Min.
35
35
7
3
Max
900
500
250
250
Max.
95
70
10
45
90
90
90
90
Unit
mA
mA
mA
Unit
µA
µA
ns
ns
ns
ns
ns
ns
ns
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