TTL234X SERIES RANGE OF CABLES Datasheet
Version 1.0
Document Reference No.: FT_001394 Clearance No.: FTDI#520
4.2 TTL-234X-5V & TTL-234X-3V3 Cable Signal Descriptions
Header Pin
Name
Type
Colour
Description
Number
1
2
3
4
5
6
GND
CTS#
VCC
GND
Input
Black
Brown
Red
Device ground supply pin.
Clear to Send Control input / Handshake signal.
+5V output,
Output
Output
Input
TXD
Orange
Yellow
Green
Transmit Asynchronous Data output.
Receive Asynchronous Data input.
Request To Send Control Output / Handshake signal.
RXD
RTS#
Output
Table 4.1 TTL-234X-5V and TTL-234X-3V3 Cable Signal Descriptions
4.3 TTL-234X-5V & TTL-234X-3V3 Electrical Parameters
4.3.1 TTL-234X-5V Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Dependant on the USB
port that the TTL-234X-
5V is connected to
VCC
Supply Voltage
4.75
5.0
5.25
V
Assuming connected
to direct to a host
port or a powered
hub, and enumerated
Icc
Supply Current
-
-
-
450
+85
mA
oC
Operating Temperature
Range
T
-40
Table 4.2 TTL-234X-5V Electrical Parameters
Parameter Description
Minimum
Typical
Maximum
5.25
Units
Conditions
Dependant to the USB
port is connected to
Voh
Vol
Vil
Output Voltage High
4.75
5.0
0
V
V
V
Output Voltage Low
-
-
0.4
Input Low Switching
Threshold
-
0.8
LVTTL
LVTTL
Input High Switching
Threshold
Vih
2
-
-
V
Table 4.3 TTL-234X-5V I/O Pin Characteristics
Copyright © Future Technology Devices International Limited
11
FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
