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ST485CN Arkusz danych(PDF) 6 Page - STMicroelectronics

Numer części ST485CN
Szczegółowy opis  Low power RS-485/RS-422 transceiver
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Electrical characteristics
ST485
6/19
4
Electrical characteristics
VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred
to TA = 25°C)
Table 5.
DC Electrical characteristics
Symbol
Parameter
Test conditions (1)
Value
Unit
-40 to 85 °C
-55 to 125 °C
Min
Typ
Max
Min
Max
VOD1
Differential Driver Output
(No Load)
55
V
VOD2
Differential Driver Output
(With Load)
RL = 27Ω (RS-485) (Figure 2.)
RL = 50Ω (RS-422) (Figure 2.)
1.5
5
5
1.4
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
0.2
V
VOC
Driver Common-Mode
Output Voltage
RL = 27Ω or 50Ω (Figure 2.)3
3
V
∆VOC
Change in Magnitude of
Driver Common-Mode
Output Voltage for
Complementary Output
States
RL = 27Ω or 50Ω (Figure 2.)0.2
0.2
V
VIH
Input High Voltage
RE, DE, DI
2.0
2.0
V
VIL
Input Low Voltage
RE, DE, DI
0.8
0.8
V
IIN1
Input Current
RE, DE, DI
± 2
± 2
µA
IIN2
Input Current (A, B)
VCM = 0V or 5.25VVDE = 0V
VIN = 12V
VIN = -7V
1
-0.8
1
-0.8
mA
mA
VTH
Receiver Differential
Threshold Voltage
VCM = -7 to 12V
-0.2
0.2
-0.2
0.2
V
∆VTH
Receiver Input
Hysteresis
VCM = 0V
70
mV
VOH
Receiver Output High
Voltage
IO = -4mAVID = 200mV
3.5
3.4
V
VOL
Receiver Output Low
Voltage
IO = 4mAVID = -200mV
0.4
0.55
V
IOZR
3-State (High
Impedance) Output
Current at Receiver
VO = 0.4 to 2.4V
± 1
± 1
µA
RIN
Receiver Input
Resistance
VCM = -7 to 12V
24
24
KW


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