XE0071 Просмотр технического описания (PDF) - Xecom
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XE0071 Datasheet PDF : 8 Pages
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XE0071 Pin Configuration
Gnd 1
T2 2
OH 3
T1 4
/RI 5
VCC 6
(top view) 9 Tip
8 Ring
7 N/C
XE0071 Pin Descriptions
Pin Name Description
1 GND
This signal acts as common reference for all control signals. Signals on T1 and T2 are not referenced to
ground.
2 T2
T2 connects directly to the secondary side of the telephone line transformer.
3 OH
Hook-switch relay control. A high on OH closes the internal relay and connects the equipment to the tele-
phone line.
4 T1
T1 connects directly to the secondary side of the telephone line transformer.
5 /RI
Ring Indicate, output, active low, TTL, /RI provides a half-wave representation of the Ring as it appears on
the telephone line.
6 VCC
VCC provides the power source for the hook-switch control. The XE0071 operates with either 3.3 volt or 5
volt power.
7 N/C No Connect
8 Ring
Ring (RJ11 Pin 4), one of two signals which form the telephone network connection. This device is not
sensitive to the polarity of the telephone line's battery voltage. Ring has 1500 volts isolation from the rest
of the circuitry. This isolation must be preserved throughout the system.
9 Tip
Tip (RJ11 Pin 3) provides the second connection to the telephone network . Tip has 1500 volts isolation
from the rest of the circuitry. This isolation must be preserved throughout the system.
Note: Xecom placed the telephone and control leads on opposite sides of the device to assist the user in maintaining the neces-
sary isolation between the telephone network and the user equipment. FCC Part 68 rules require 1500 volts isolation between
the telephone line and all other circuits.
XECOM
(2)
XE0071
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