DS_USB-COM422-PLUS1 Datasheet, PDF (13/23 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd

4 Electrical details
Document Reference No.: FT_000131
USB-COM422-PLUS1 Datasheet
Version 1.1
Clearance No.: FTDI# 94
4.1 USB
Parameter
Description
USB_VCC
Input Power Voltage*
Icc
USB current
Table 4.1 USB Electrical Details
Minimum Typical Maximum Units
Conditions
4.25
5.0*
5.25
*Present when USB
cable is attached and
V
USB Host or Hub
powered.
30
50
mA
4.2 RS422
Parameter
Receiver Input
Description
Minimum Typical Maximum Units
Conditions
VCM
IN
VTH
VIHYST
RIN
Common-mode input
voltage range
Input Current
Differential Threshold
Voltage
Input Hysteresis
Input Resistance, RIN
-7
-0.2
12
+12
20
15
1.0
-0.8
+0.2
V
VIN = +12V
mA
VIN = -7V
V
mV
kΩ
Transmitter Output
Differential Output
VOD
Voltage,
1.5
5
V
With RL = 54Ω.
CL = 50pF *
ESD Tolerance
ESD HBM
RS-422 Inputs and
Outputs
±15
kV
EN61000-4-2
RS-422 Inputs and
Contact Discharge ^Outputs
±8
kV
EN61000-4-2 Air ^{RS-422 Inputs and}
Gap Discharge ^Outputs
Table 4.2 RS422 Electrical Details
±15
kV
* - 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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