st485ec STMicroelectronics, st485ec Datasheet - Page 6

• Manufacturer Part Number: st485ec
• Description: ?15 Kv Esd Protected, Low Power Rs-485/rs-422 Transceiver
• Manufacturer: STMicroelectronics

4
Table 6.
Table 7.
6/18
Symbol
Symbol
I
V
V
ΔV
ΔV
ΔV
I
V
V
OSD1
V
V
ESD
ESD
V
I
I
R
I
V
OZR
OD1
OD2
IN1
IN2
CC
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 I
Receiver output low voltage
3-State (high impedance)
output current at receiver
Receiver input resistance
No load supply current
Driver short-circuit current,
V
ESD protection voltage
ESD protection voltage
O
Electrical characteristics
ESD performance: transmitter outputs, receiver inputs
DC electrical characteristics (V
specified. Typical values are referred to T
=High
Parameter
Parameter
(2)
R
R
R
R
R
RE, DE, DI
RE, DE, DI
RE, DE, DI
V
V
V
V
V
I
V
V
V
V
V
V
O
O
CM
IN
IN
CM
CM
O
CM
RE
DE
DE
O
L
L
L
L
L
= -4 mA, V
= 4 mA, V
= 27 Ω (RS-485)
= 50 Ω (RS-422)
= 27 Ω or 50 Ω
= 27 Ω or 50 Ω
= 27 Ω or 50 Ω
= 0.4 to 2.4 V
= -7 to 12 V
= 12 V
= -7 V
= 0V or V
= V
= 0 V
= 0 V or 5.25 V, V
= -7 to 12 V
= 0 V
= -7 to 12 V
CC
CC
Test conditions
Human body model
IEC-1000-4-2
= 5 V ± 5 %, T
ID
ID
CC
= -200 mV
Test conditions
= 200 mV
(3)
A
(Figure
(Figure
(Figure
= 25 °C)
(Figure
(Figure
DE
= 0 V
(1)
2)
2)
2)
2.)
2)
A
= T
MIN
to T
Min.
Min.
-0.2
±15
1.5
2.0
3.5
96
35
±8
MAX
, unless otherwise
Typ.
Typ.
400
300
70
Max.
Max.
-0.8
900
500
250
0.8
0.2
0.2
± 2
0.2
0.4
± 1
5
5
5
3
1
Unit
Unit
mA
mA
mV
mA
kV
kV
µA
µA
µA
µA
kΩ
V
V
V
V
V
V
V
V
V
V
V