st485erb STMicroelectronics, st485erb Datasheet - Page 7

• Manufacturer Part Number: st485erb
• Description: Ic Txrx Lopwr Rs485/422 8 Dip
• Manufacturer: STMicroelectronics

Table 7.
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.
to T
Table 8.
1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are
(V
Symbol
Symbol
I
I
I
OSD1
OSD2
CC
t
t
I
OSR
t
t
t
t
t
C
referenced to device ground unless specified.
t
referenced to device ground unless specified.
t
CC
PLH
TLH
THL
PZH
PHZ
A
PZL
PLZ
PHL
SK
AB
= 25 °C)
= 5 V ± 5 %, T
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 (continued)
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
= 100pF, S2 = Closed
= 100pF, S1 = Closed
= 15pF, S1 = Closed
= 15pF, S2 = 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
= 54Ω, C
= 54Ω, C
= 54Ω, C
Test conditions
Test conditions
CC
and
and
and
and
and
and
and
CC
L1
L1
L1
CC
(3)
(3)
= C
= C
= C
Figure
Figure
Figure
Figure
Figure
Figure
Figure
L2
L2
L2
DE
(1)
= 100pF
= 100pF
= 100pF
(1)
6)
6)
6)
7)
7)
7)
7)
= 0 V
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
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