XECOM
(3)
XE2422H
XE2422H Pin Configuration
Pin Descriptions
PIN
NAME
DESCRIPTION
1
Tip
The Ring and Tip signals connect the modem to the telephone line. FCC Part 68 Rules
require a 1500 volt isolation barrier between the telephone line and all other circuits.
This isolation must be preserved throughout the system.
The telephone company places a DC “Battery” voltage across Tip and Ring on public
switched telephone lines. The XE2422H operates regardless of the polarity of this
voltage. The “Battery” voltage drives up to 120 milliampere of DC loop current.
UL60950 requires minimum creepage and clearances distances between the Tip and
Ring traces and all other circuits. Clearance is the shortest distance between conductive
circuits; creepage is the distance between conductive points along the surface
2
Ring
The Ring and Tip signals connect the modem to the telephone line. FCC Part 68 Rules
require a 1500 volt isolation barrier between the telephone line and all other circuits.
This isolation must be preserved throughout the system.
The telephone company places a DC “Battery” voltage across Tip and Ring on public
switched telephone lines. The XE2422H operates regardless of the polarity of this
voltage. The “Battery” voltage drives up to 120 milliampere of DC loop current.
UL60950 requires minimum creepage and clearances distances between the Tip and
Ring traces and all other circuits. Clearance is the shortest distance between conductive
circuits; creepage is the distance between conductive points along the surface.
Note: Pin 1 is marked with a white circle on the top of the module
Top View
1
2
3
4
5
6
7
13
12
11
10
9
8
Tip
Ring
/DCD
/DTR
/RI
Reserved
GND
VCC
/INT
/CTS
/RESET
RXD
TXD
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