USB-COM485-PLUS-4 FTDI, USB-COM485-PLUS-4 Datasheet - Page 17

• Manufacturer Part Number: USB-COM485-PLUS-4
• Description: MODULE, DEV, USB-RS485, 4 COM PORT
• Manufacturer: FTDI
• Type: Developmentr

Specifications of USB-COM485-PLUS-4

• Mcu Supported Families: FT232R, FT2232, FT232BM
• Kit Features: Works With USB 1.1 & 2.0 Host And Hub Ports, FIFO
• Svhc: No SVHC (18-Jun-2010)
• 2.0 Host And Hub Ports, Fifo: 2KB Transmit Buffer, 2KB Receive Buffer
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4
4.1
Table 4.1 - USB Electrical Details
4.2
Table 4.2 – RS485 Electrical Details
4.3
The USB-COM485-PLUS4 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-PLUS4 itself. Up to
250mA (total output on all 4 ports) 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-PLUS4
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
5.25
+12
250
50
Document Reference No.: FT_000153
Units
Units
Units
mA
mA
KV
V
V
V
USB-COM485-PLUS4 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
R
R
For all RS-485 Inputs
and Outputs pin
USB interface is not in
total current available
SUSPEND. This is the
L
L
Clearance No.: FTDI# 108
= 50R C
= 50R C
on all 4 ports
Conditions
Conditions
Conditions
L
L
= 50pF
= 50pF
Version 1.2
16