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ST485EBD Scheda tecnica(PDF) 6 Page - STMicroelectronics

Il numero della parte ST485EBD
Spiegazioni elettronici  /-15 kV ESD protected, low power RS-485/RS-422 transceiver
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST485EBD Scheda tecnica(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
ST485EB - ST485EC - ST485EX
6/18
4
Electrical characteristics
Table 6.
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 7.
DC electrical characteristics (VCC = 5 V ± 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 = 27 Ω (RS-485) (Figure 2)
RL = 50 Ω (RS-422) (Figure 2.)
1.5
5
5
V
V
ΔVOD
Change in magnitude of
driver differential output
voltage for complementary
output states
RL = 27 Ω or 50 Ω (Figure 2)0.2
V
VOC
Driver common-mode output
voltage
RL = 27 Ω or 50 Ω (Figure 2)3
V
ΔVOC
Change in magnitude of
driver common-mode output
voltage for complementary
output states
RL = 27 Ω or 50 Ω (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
± 2µA
IIN2
Input current (A, B)
VCM = 0 V or 5.25 V, VDE = 0 V
VIN = 12 V
VIN = -7 V
1
-0.8
mA
mA
VTH
Receiver differential
threshold voltage
VCM = -7 to 12 V
-0.2
0.2
V
ΔVTH
Receiver input hysteresis
VCM = 0 V
70
mV
VOH
Receiver output high voltage IO = -4 mA, VID = 200 mV
3.5
V
VOL
Receiver output low voltage
IO = 4 mA, VID = -200 mV
0.4
V
IOZR
3-State (high impedance)
output current at receiver
VO = 0.4 to 2.4 V
± 1µA
RIN
Receiver input resistance
VCM = -7 to 12 V
96
k
Ω
ICC
No load supply current (2)
VRE = 0V or VCC
VDE = VCC
VDE = 0 V
400
300
900
500
µA
µA
IOSD1
Driver short-circuit current,
VO=High
VO = -7 to 12 V
(3)
35
250
mA


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