XE0055S Просмотр технического описания (PDF) - Xecom
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XE0055S Datasheet PDF : 8 Pages
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Pin Descriptions
Pin Name Description
1
Ring
2
Tip
3
OH
4
T1
5
GND
6
VCC
7
T2
8
/RI
Ring is one of two signals which form
the telephone network connection
(RJ11 Pin 4). This device is not
sensitive to the polarity of the battery
voltage on the telephone line. Ring
has 1500 volts isolation from the rest
of the circuitry. This isolation must
be preserved throughout the system.
PIN CONFIGURATION
XE0055S & XE0055T
1 o Ring
2 o Tip
(top view)
Tip provides the second connection
to the telephone network (RJ11 Pin
3). Tip has 1500 volts isolation from
the rest of the circuitry. This isolation
must be preserved throughout the
system.
Hook-switch relay control. A high on
OH closes the internal relay and
connects the equipment to the
telephone line.
3 o OH
4 o T1
5 o Gnd
6 o VCC
7 o T2
8 o /RI
T1 connects directly to the secondary side of the XE0055S telephone line
transformer.
This signal is used as common reference for all of the control signals in the
XE0055S. Signals on T1 and T2 are not referenced to ground.
VCC provides the power source for the hook-switch control. The XE0055S
will operate with VCC equal to 3 to 5 volts
T2 connects directly to the secondary side of the telephone line transformer of
the XE0055S
Ring Indicate, output, active low TTL. Ri goes low on the XE0055S with each
ring and remains low as long as the ring is present on the telephone line.
The XE0055T RI output provides a pulse at twice the Ring Frequency.
3/XECOM
XE0055S&T
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