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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
Table of Contents
Ag1171
+3.3V / +5.0V Low Power Ringing SLIC
1. Features...........................................................................................................................1
2. Description.......................................................................................................................1
Table of Contents.............................................................................................................2
Table of Figures ...............................................................................................................2
3. Ag1171 Product Selector .................................................................................................3
4. Pin Description.................................................................................................................5
5. Functional Description .....................................................................................................6
5.1. Line Interfacing..........................................................................................................6
5.2. Battery Feed..............................................................................................................6
5.3. Ringing ......................................................................................................................6
5.4. Power Down and Synchronisation.............................................................................7
5.5. The 2-4 Wire (hybrid) Conversion .............................................................................8
5.6. Transmit and Receive Gain.......................................................................................8
5.7. The 2 Wire Impedance ..............................................................................................8
5.8. Network Balance Impedance ....................................................................................8
5.9. Tip & Ring Polarity Reversal .....................................................................................8
5.10. On Hook Transmission............................................................................................8
5.11. Switch Hook Detection ............................................................................................9
6. Protection of the Ag1171 SLIC ......................................................................................10
6.1. Thermal Protection ..................................................................................................10
6.2. Lightning and Power Cross Protection ....................................................................10
7. Typical Application .........................................................................................................10
8. DC Supply Voltage ........................................................................................................10
9. Layout Considerations ...................................................................................................11
9.1. Power and Ground ..................................................................................................11
10. Electrical Characteristics..............................................................................................12
10.1. Absolute Maximum Ratings* .................................................................................12
10.2. Recommended Operating Conditions* ..................................................................12
10.3. DC Electrical Characteristics* ...............................................................................13
10.4. AC Electrical Characteristics*................................................................................14
11. Package.......................................................................................................................15
Table of Figures
Figure 1: Block Diagram ......................................................................................................3
Figure 2: Ag1171 Package Format ......................................................................................4
Figure 3: Ringing Signal Waveforms ...................................................................................7
Figure 4: Typical Connection Diagram.................................................................................9
Figure 5: Optional EMI Suppression ..................................................................................11
© Silver Telecom 2006
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