ST485 ST Microelectronics, ST485 Datasheet - Page 6

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

Electrical characteristics
4
Table 5.
6/19
Symbol
∆V
∆V
V
V
∆V
I
V
V
V
V
I
I
R
V
OZR
V
OD1
OD2
IN1
IN2
OC
OH
TH
OL
IH
IN
OD
OC
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
Electrical characteristics
V
to T
DC Electrical characteristics
CC
Parameter
A
= 5V ± 5%, T
= 25°C)
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
O
O
CM
IN
IN
CM
CM
O
CM
L
L
L
L
L
MIN
= -4mAV
= 4mAV
= 27Ω (RS-485)
= 50Ω (RS-422)
= 27Ω or 50Ω
= 27Ω or 50Ω
= 27Ω or 50Ω
= 0.4 to 2.4V
= 12V
= -7V
= 0V or 5.25VV
= -7 to 12V
= 0V
= -7 to 12V
Test conditions
to T
ID
MAX
ID
= -200mV
= 200mV
, unless otherwise specified. Typical values are referred
(Figure
(Figure
(Figure
DE
(Figure
(Figure
= 0V
(1)
2.)
2.)
2.)
2.)
2.)
Min
-0.2
1.5
2.0
3.5
24
-40 to 85 °C
Typ
70
Value
Max
-0.8
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
0.2
0.2
0.8
± 2
0.2
± 1
5
5
5
3
1
ST485
Unit
KW
mA
mA
mV
µA
µA
V
V
V
V
V
V
V
V
V
V
V