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USB-COM422-PLUS1 Folha de dados(PDF) 13 Page - List of Unclassifed Manufacturers

Nome de Peças USB-COM422-PLUS1
Descrição Electrónicos  Future Technology Devices International Ltd
PDF  23 Pages
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Fabricante Electrônico  ETC2 [List of Unclassifed Manufacturers]
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USB-COM422-PLUS1 Folha de dados(HTML) 13 Page - List of Unclassifed Manufacturers

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Copyright © 2010 Future Technology Devices International Limited
12
Document Reference No.: FT_000131
USB-COM422-PLUS1 Datasheet
Version 1.1
Clearance No.: FTDI# 94
4 Electrical details
4.1 USB
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
USB_VCC
Input Power Voltage*
4.25
5.0*
5.25
V
*Present when USB
cable is attached and
USB Host or Hub
powered.
Icc
USB current
30
50
mA
Table 4.1 USB Electrical Details
4.2 RS422
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Receiver Input
VCM
Common-mode input
voltage range
-7
+12
V
IN
Input Current
1.0
mA
VIN = +12V
-0.8
VIN = -7V
VTH
Differential Threshold
Voltage
-0.2
+0.2
V
VIHYST
Input Hysteresis
20
mV
RIN
Input Resistance, RIN
12
15
k
Ω
Transmitter Output
VOD
Differential Output
Voltage,
1.5
5
V
With RL = 54
Ω.
CL = 50pF *
ESD Tolerance
ESD HBM
RS-422 Inputs and
Outputs
±15
kV
EN61000-4-2
Contact Discharge
RS-422 Inputs and
Outputs
±8
kV
EN61000-4-2 Air
Gap Discharge
RS-422 Inputs and
Outputs
±15
kV
Table 4.2 RS422 Electrical Details
* - The 54 ohms is the equivalent of two 120 ohm termination resistors placed on each side of the
transmission line and the input impedance of 32 receivers on the line.



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