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ST3485E 数据表(PDF) 4 Page - STMicroelectronics

部件名 ST3485E
功能描述  3.3V POWERED, 15KV ESD PROTECTED, TRASMIT AT UP TO 12MBPS TRUE RS-485/RS-422 TRANSCEIVER
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST3485E 数据表(HTML) 4 Page - STMicroelectronics

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ST3485E
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TRANSMITTER ELECTRICAL CHARACTERISTICS
VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta =25°C)
RECEIVER ELECTRICAL CHARACTERISTICS
VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta =25°C)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VOD
Differential Drive Output
RL= 100Ω (RS-422) (Figure 1)
2
V
RL=54Ω (RS-485) (Figure 1)
1.5
V
RL=60Ω (RS-485) (Figure 2)
1.5
V
∆V
OD
Change in magnitude of
Driver Differential Output
Voltage for Complementary
Output States (Note1)
RL=54Ω or 100Ω (Figure 1)
0.2
V
VOC
Driver Common Mode
Output Voltage
RL=54Ω or 100Ω (Figure 1)
3
V
∆V
OC
Change in magnitude of
Driver Common Mode
Output Voltage (Note1)
RL=54Ω or 100Ω (Figure 1)
0.2
V
IOSD
Driver Short Circuit Output
Current
± 250
mA
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VTH
Receiver Differential
Threshold Voltage
VCM = -7V to 12V, DE = 0
-0.2
-0.015
V
∆V
TH
Receiver Input Hysteresis
VCM =0V
30
V
VOH
Receiver Output High
Voltage
IOUT = -4mA, VID = 200mV, (Figures 8,9)
2
V
VOL
Receiver Output Low
Voltage
IOUT = 4mA, VID = -200mV, (Figure 3)
0.4
V
IOZR
3-State (High Impedance)
Output Current at Receiver
VCC = 3.6V VO =0V toVCC
± 1
µA
RRIN
Receiver Input Resistance
VCM = -7V to 12V
24
K
IOSR
Receiver Short-Circuit
Current
VRO =0V toVCC
760
mA


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