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ST485E bảng dữ liệu(PDF) 6 Page - STMicroelectronics

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ST485E bảng dữ liệu(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
ST485E
6/19
4
Electrical characteristics
Table 5.
ESD Performance: transmitter outputs, receiver inputs
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
ESD
ESD Protection voltage
Human body model
±15
KV
ESD
ESD Protection voltage
IEC-1000-4-2
±8KV
Table 6.
DC Electrical characteristics (VCC = 5V ± 5%, TA = TMIN to TMAX, unless otherwise
specified. Typical values are referred to TA = 25°C)
Symbol
Parameter
Test conditions (1)
Min.
Typ.
Max.
Unit
VOD1
Differential driver output (No
Load)
5V
VOD2
Differential driver output
(With Load)
RL = 27Ω (RS-485) (Figure 2.)
RL = 50Ω (RS-422) (Figure 2.)
1.5
5
5
V
V
∆VOD
Change in magnitude of
driver differential output
voltage for complementary
output states
RL = 27Ω or 50Ω (Figure 2.)0.2
V
VOC
Driver common-mode output
voltage
RL = 27Ω or 50Ω (Figure 2.)3
V
∆VOC
Change in magnitude of
driver common-mode output
voltage for complementary
output states
RL = 27Ω or 50Ω (Figure 2.)0.2
V
VIH
Input high voltage
RE, DE, DI
2.0
V
VIL
Input low voltage
RE, DE, DI
0.8
V
IIN1
Input current
RE, DE, DI
± 2
µA
IIN2
Input current (A, B)
VCM = 0V or 5.25V, VDE = 0V
VIN = 12V
VIN = -7V
1
-0.8
mA
mA
VTH
Receiver differential
threshold voltage
VCM = -7 to 12V
-0.2
0.2
V
∆VTH
Receiver input hysteresis
VCM = 0V
70
mV
VOH
Receiver output high voltage IO = -4mA, VID = 200mV
3.5
V
VOL
Receiver output low voltage
IO = 4mA, VID = -200mV
0.4
V
IOZR
3-State (high impedance)
output current at receiver
VO = 0.4 to 2.4V
± 1
µA
RIN
Receiver input resistance
VCM = -7 to 12V
24
K
ICC
No load supply current (2)
VRE = 0V or VCC
VDE = VCC
VDE = 0V
400
300
900
500
µA
µA
IOSD1
Driver short-circuit current,
VO=High
VO = -7 to 12V
(3)
35
250
mA


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