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부품번호 | AG1171 기능 |
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기능 | Low Power Ringing SLIC | ||
제조업체 | Siliver | ||
로고 | |||
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www.DataSheet4U.com
Silver
V1.0 Dec 2006
Data Sheet
Ag1171
T E L E C O M +3.3V / +5.0V Low Power Ringing SLIC
Pb 1. Features
¾ A highly featured low power SLIC in a
14 pin SIL format.
¾ Integral high efficiency DC/DC
converter. Single supply voltage:
+3.3V to +5.0V.
¾ Highly integrated with an on-board
ringing generator.
¾ Tip/Ring polarity reversal. On-Hook
Transmission for caller line ID.
¾ Suitable for FCT applications.
¾ Easy to use, with a minimum number
of external components.
¾ Simplified protection in “on-premise”
applications.
¾ Silver Telecom “design-in” assistance
2. Description
The Silver Telecom Ag1171 is a single Subscriber Line Interface Circuit (SLIC) in a 14 pin
single in line (SIL) format. The combination of features and packaging offers extremely efficient
use of board area, saving significant system size and cost, minimising time to market for
Telephony Systems developers.
The Ag1171 has been designed to work with loop lengths of typically 1.0km (470R including
telephone).
The Ag1171 has integral dc/dc converter and ringing generation thus providing all the line
powering requirements from a single supply. The Ag1171 requires a minimum of external
components, making it ideal for low line count, short loop length applications, such as WLL
Terminal (WLL), Fixed Cellular Terminals (FCT), Fixed Wireless Terminals (FWT) and Internet
Telephony (VoIP).
© Silver Telecom 2006
V1.0 Dec 2006
Data Sheet
Ag1171
+3.3V / +5.0V Low Power Ringing SLIC
Ag1171
1
Figure 2: Ag1171 Package Format
© Silver Telecom 2006
4
4페이지 V1.0 Dec 2006
Data Sheet
Signal
1
INPUT RM
0
1
OUTPUT SHK
0
Ag1171
+3.3V / +5.0V Low Power Ringing SLIC
Condition 1 - DC ope ration
Notes
No ringing
Off Hook
Off hook detected
NO TE: SHK SHOULD
BE DE-BOUNCED FO R
10ms
Condition 2 - Ringing On-hook
Condition 3 - Ringing/Off-hook
1
RM
0
1 sec
3 sec
1 sec
3 sec
1
F/R
(input) 0
1
SHK
0
The phone goes off hook, and SHK is detected at point A
(leading edge). RM must be switched low in <500ms
(point B), and the ringing cadence should be removed
fro m F/R..
AB
As long as the telephone is off hook, SHK will remain high.
Figure 3: Ringing Signal Waveforms
5.4. Power Down and Synchronisation
The DC/DC converter can be switched off by applying a logic (L) level to the PD input. The
SLIC takes 50ms to power up from this state. Logic outputs are not valid during this time.
When using the power down function, it is recommended that the SLIC is polled (powered
up periodically) to check for SHK (the subscriber has gone off-hook). If Power Down mode
is not required, the PD pin should be left open circuit. The PD input should not be taken to
a logic (H) as this may damage the SLIC. Connecting to PD via a diode will ensure it is
never taken (H). NOTE: This is a sensitive node, keep connections very short.
The DC/DC has an internal oscillator. If desired, the oscillator frequency may be
synchronised with an external clock for EMI reasons. To do this, a 64kHz square wave
(with 50:50 mark space) should be inputted to the PD pin. See Applications Note: AN1171-
1, for further details.
© Silver Telecom 2006
7
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