st485ab STMicroelectronics, st485ab Datasheet - Page 6

• Manufacturer Part Number: st485ab
• Description: Very High Speed Low Power Rs-485/rs-422 Transceiver
• Manufacturer: STMicroelectronics

4
Table 6.
Table 7.
Table 8.
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Symbol
Symbol
Symbol
I
SUPPLY
ΔV
ΔV
V
V
I
C
C
V
I
I
V
OSD
V
OD1
OD2
IN1
IN2
OC
I/O
AB
IH
IL
OD
OC
V
Input/output capacitance
Driver output capacity
Input logic threshold low
Input logic threshold high
Logic input current
Input current (A, B)
Differential driver output (No load)
Differential driver output (with load)
Change in magnitude of driver
differential output voltage for
complementary output states
(Note:
Driver common mode output
voltage
Change in magnitude of driver
common mode output voltage
(Note:
Driver short circuit output current
CC
Electrical characteristics
DC electrical characteristics (V
specified. Typical values are referred to T
Logic input electrical characteristics (V
otherwise specified. Typical values are referred to T
Transmitter electrical characteristics (V
otherwise specified. Typical values are referred to T
Power supply current
1)
1)
Parameter
Parameter
Parameter
No load, V
DE, DI, RE
DE, DI, RE
DE, DI, RE
V
V
DE
CC
=0 V,
= 0 or 5.25 V
V
R
V
R
R
R
CM
O
L
L
L
L
= 54 Ω (RS-422)
= 27 Ω or 50 Ω
= 27 Ω or 50 Ω
= 54 Ω or 100 Ω
= -7 V to 12 V
CC
RE
= -7 V to 12 V
=0 V or V
Test conditions
Test conditions
= 4.5 V to 5.5 V, T
Test conditions
A
CC
CC
= 25°C, V
CC
= 4.5 V to 5.5 V, T
= 4.5 V to 5.5 V, T
V
V
V
V
DE
DE
IN
IN
A
A
=12 V
=-7 V
CC
= V
= 0 V
= 25°C, V
= 25°C, V
A
= 5 V)
CC
= -40 to 85°C, unless otherwise
(Note:
CC
CC
A
A
= -40 to 85°C, unless
= -40 to 85°C, unless
Min.
Min.
Min.
1.5
= 5 V)
= 5 V)
1
2
1)
Typ.
Typ.
Typ.
2.7
2.3
2.6
(Note:
(Note:
10
10
0
0
± 250
Max.
Max.
Max.
± 2.0
-0.8
1)
1)
0.8
0.2
0.2
5
5
1
5
5
3
Unit
Unit
Unit
mA
mA
mA
mA
mA
pF
pF
µA
V
V
V
V
V
V
V