USB-COM485-PLUS2 FTDI, USB-COM485-PLUS2 Datasheet - Page 15

• Manufacturer Part Number: USB-COM485-PLUS2
• Description: Interface Modules & Development Tools USB HS to RS485 Conv Assembly 2 DB9 Ports
• Manufacturer: FTDI

Specifications of USB-COM485-PLUS2

• Interface Type: USB, RS-485
• Data Bus Width: Serial
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: FT2232H
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: USB-COM485-PLUS-2

4
4.1
Table 4.1 - USB Electrical Details
4.2
Table 4.2 – RS485 Electrical Details
4.3
The USB-COM485-PLUS2 provides +5V DC for an external device that requires power on pin9 of DB9.
The maximum allowable current is 500mA, including the circuitry of the USB-COM485-PLUS2 itself. Up to
450mA may be used by the external device. The +5V output is only enabled when the USB interface is
not in suspend.
Table 4.3 - Power Output for USB-COM485-PLUS2
Electrical details
Parameter
Parameter
Parameter
USB_VCC
ESD HBM
USB
RS485
Power Output
V
V
I
trans
I
cc
rec
O
Description
Input Power Voltage*
USB current***
Description
Transmitter output
voltage swing
Receiver input voltage
range
N/A
Description
Output Power Current
Copyright © 2010 Future Technology Devices International Limited
Minimum
Minimum
Minimum
4.25
-7
2
0
Typical
Typical
Typical
5.0*
±15
30
Maximum
Maximum
Maximum
250*
5.25
+12
50
Document Reference No.: FT_000136
Units
Units
Units
mA
mA
KV
V
V
V
USB-COM485-PLUS2 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 of
both ports.
R
R
For all RS-485 Inputs
and Outputs pin
USB interface is not in
SUSPEND.
*This is total current
between the 2 ports.
L
L
Clearance No.: FTDI#104
= 50R C
= 50R C
Conditions
Conditions
Conditions
L
L
= 50pF
= 50pF
Version 1.2
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