ST485B STMICROELECTRONICS [STMicroelectronics], ST485B Datasheet - Page 6

• Manufacturer Part Number: ST485B
• Description: Low power RS-485/RS-422 transceiver
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

4
Table 6.
6/19
Symbol
ΔV
ΔV
V
V
ΔV
I
V
V
V
V
I
I
R
V
OZR
I
V
OD1
OD2
IN1
IN2
CC
OC
OH
TH
OL
OD
OC
IH
IN
IL
TH
Differential driver output
(no load)
Differential driver output
(with load)
Change in magnitude of
driver differential output
voltage for complementary
output states
Driver common-mode
output voltage
Change in magnitude of
driver common-mode
output voltage for
complementary output
states
Input high voltage
Input low voltage
Input current
Input current (A, B)
Receiver differential
threshold voltage
Receiver input hysteresis
Receiver output high
voltage
Receiver output low
voltage
3-state (high impedance)
output current at receiver
Receiver input resistance
No load supply current
Electrical characteristics
DC electrical characteristics
V
to T
CC
A
Parameter
= 5 V ± 5 %, T
= 25 °C)
(2)
A
= T
R
R
R
R
R
RE, DE, DI
RE, DE, DI
RE, DE, DI
V
V
V
V
V
I
I
V
V
V
V
V
O
O
CM
IN
IN
CM
CM
O
CM
RE
DE
DE
L
L
L
L
L
MIN
= -4mA, V
= 4mA, V
= 27Ω (RS-485)
= 50Ω (RS-422)
= 27Ω or 50Ω
= 27Ω or 50Ω
= 27Ω or 50Ω
= 0.4 to 2.4V
= 12V
= -7V
= 0V or V
= V
= 0V
= 0V or 5.25V, V
= -7 to 12V
= 0V
= -7 to 12V
Test conditions
to T
CC
MAX
ID
ID
CC
= -200mV
, unless otherwise specified. Typical values are referred
= 200mV
Figure 2
Figure 2
Figure 2
Figure 2
Figure 2
DE
(1)
= 0V
Min.
-0.2
1.5
2.0
3.5
24
-40 to 85 °C
Typ.
400
300
70
Value
Max.
-0.8
900
500
0.2
0.2
0.8
0.2
0.4
± 2
± 1
5
5
5
3
1
-55 to 125 °C
Min.
-0.2
1.4
2.0
3.4
24
Max.
0.55
-0.8
900
500
0.2
0.2
0.8
± 2
0.2
± 1
5
5
5
3
1
Unit
mA
mA
mV
µA
µA
KΩ
µA
µA
V
V
V
V
V
V
V
V
V
V
V