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參數資料
| 型號： | AG2120 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | FULLY FEATURED PSTN INTERFACE |
| 中文描述： | 全功能PSTN接口 |
| 文件頁數： | 4/14頁 |
| 文件大小： | 256K |
| 代理商： | AG2120 |
V2.0 October 2002
Advance Data Sheet
Silver Telecom 2002
Page 4
Ag2120
FULLY FEATURED PSTN INTERFACE
1.2 SIL Pin-Out
Pin #
Name
Description
1
RING (B)
Ring.
Connects to the subscriber line Ring.
2
TIP (A)
Tip.
Connects to the subscriber line Tip.
3
CATHODE
Cathode.
For power cross protection connect to protection device
cathode.
4
ANODE
Anode.
For power cross protection connect to protection device anode.
5
GATE
Gate.
For power cross protection connect to protection device gate.
6
DMb
DC Mask b.
A resistor is connected between this pin and DMa to adjust
the d.c. characteristics of the termination.
DC Mask a.
A resistor is connected between this pin and DMb to adjust
the d.c. characteristics of the termination.
7
DMa
8
LC
Loop current.
A logic 1 Indicates that loop current is flowing.
9
V
IN
Audio In.
This is the analog input signal from the Codec (which is output
on Tip and Ring). Connected via a 100nF capacitor.
Audio Out.
This is the analog output signal (from Tip and Ring) to the
Codec. Connected via a 100nF capacitor.
10
V
OUT
11
LSC
Loop switch control.
Applying a logic 1 closes the integral loop switch.
12
GND
Analog ground.
Normally connected to system ground.
13
V
CC
Positive supply.
Must be connected to +5V or +3.3V.
14
F/R
Forward/reverse.
A logic 1 indicates that the Tip and Ring polarities
are reversed. i.e. Tip is negative with respect to Ring.
Balance network.
The network balance matching components are
connected between this pin, V
IN
and GND.
2 Wire matching network 2.
The 2 wire impedance matching network
is connected between this pin and Z
. The compensation impedance Zc
is connected between this pin and Zb.
2 Wire matching network 1.
The 2 wire impedance matching network
is connected between this pin and Z
T2
.
Ringing signal.
A logic 0 indicates the presence of ringing voltage on
the telephone line. Toggles at ringing frequency.
Reference voltage.
Used with V
to detect off-hook parallel phone.
Normally left open circuit. Approx. +1.9V
Tip/Ring voltage.
Indicates the voltage at Tip/Ring. Divided by 50 and
relative to Vref.
15
Z
b
16
Z
T2
17
Z
T1
18
RS
19
V
REF
20
V
TR
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