USB-COM485-PLUS-1 FTDI, Future Technology Devices International Ltd, USB-COM485-PLUS-1 Datasheet - Page 13

• Manufacturer Part Number: USB-COM485-PLUS-1
• Description: MODULE USB TO RS485 CONV SGL
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: USB-COM-Plusr

Specifications of USB-COM485-PLUS-1

• Convert From (adapter End): USB-B
• Convert To (adapter End): DE-9P Male
• Features: USB to RS485 Serial Converter Assy, w/LEDs, 3Mbps
• For Use With/related Products: Windows® 2000 or higher, Linux, Max OS X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1038; USB-COM485-PLUS-1

4
4.1
Table 4.1 USB Electrical Details
4.2
Table 4.2 RS485 Electrical Details
* -
Receiver Input
Transmitter Output
ESD Tolerance
Contact Discharge
EN61000-4-2 Air
Gap Discharge
The 54 ohms is the equivalent of two 120 ohm termination resistors placed on each side of the
EN61000-4-2
Electrical details
Parameter
Parameter
ESD HBM
USB_VCC
VIHYST
USB
RS485
VCM
VOD
VTH
RIN
IN
I
cc
Description
Input Power Voltage*
USB current***
Description
Common-mode input
voltage range
Input Current
Differential Threshold
Voltage
Input Hysteresis
Input Resistance, RIN
Differential Output
Voltage
RS485 Inputs and
Outputs
RS-485 Inputs and
Outputs
RS-485 Inputs and
Outputs
Copyright © 2010 Future Technology Devices International Limited
Minimum
Minimum
4.25
-0.2
1.5
12
-7
Typical
Typical
5.0*
+12
±15
±15
30
20
15
±8
Maximum
Maximum
+0.2
5.25
-0.8
1.0
50
5
Document Reference No.: FT_000132
Units
Units
mA
mA
mV
kΩ
kV
kV
kV
V
V
V
V
USB-COM485-PLUS1 Datasheet
*Present when USB
cable is attached and
USB Host or Hub
powered.
***Does not include
power supplied to
external device
connected to pin 9
VIN = +12V
VIN = -7V
With RL = 54Ω.
CL = 50pF *
Clearance No.: FTDI# 95
Conditions
Conditions
Version 1.21
12