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AG1171 の電気的特性と機能

AG1171のメーカーはSiliverです、この部品の機能は「Low Power Ringing SLIC」です。


製品の詳細 ( Datasheet PDF )

部品番号 AG1171
部品説明 Low Power Ringing SLIC
メーカ Siliver
ロゴ Siliver ロゴ 




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AG1171 Datasheet, AG1171 PDF,ピン配置, 機能
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

1 Page





AG1171 pdf, ピン配列
V1.0 Dec 2006
Data Sheet
Ag1171
+3.3V / +5.0V Low Power Ringing SLIC
3. Ag1171 Product Selector
Part Number
Ag1171
Impedance Package Supply Voltage
600 ohm
SIL 3.3 to 5.0 Volt
Table 1: Ordering Information
Marking
Figure 1: Block Diagram
© Silver Telecom 2006
3


3Pages


AG1171 電子部品, 半導体
V1.0 Dec 2006
Data Sheet
Ag1171
+3.3V / +5.0V Low Power Ringing SLIC
5. Functional Description
5.1. Line Interfacing
As well as being used in an electrically demanding environment, the needs of different
applications and regulatory standards means that the SLIC must be flexible, and have
facilities to ensure robust performance. The Ag1171 SLIC provides a complete and flexible
interface to the telephone.
5.2. Battery Feed
The Ag1171 has an integral DC/DC converter, which generates the battery voltage in the
device. This means that only a single supply of between +3.3V to +5.0V is needed, unlike
conventional SLICs which will also need a battery voltage of anything between 20V and
60V ( 75V for ringing). This confers a significant cost, space and time to market benefit on
the equipment designer.
The battery feed to the telephone line is generated from the positive supply rail. This
provides a 48V battery feed to the line driver, which is adjusted automatically to match line
conditions. In Forward mode the Ring voltage is negative with respect to the Tip voltage.
Power efficiency is good, because the line is supplied with only as much power as is
needed. Little excess heat is generated, even on short lines. The loop current is pre-set to
a constant 30mA, under the conditions shown in Section 10.3 of this datasheet, which
specifies the ‘DC Electrical Characteristics’ for the Ag1171.
5.3. Ringing
The ringing signal is generated by switching the SLIC into ringing mode, by setting the RM
pin high, and then toggling the F/R pin at the required frequency and cadence. The
toggling of the F/R pin produces a balanced signal at Tip and Ring. These signal
waveforms are shown in Figure 3. Ringing voltage of approximately 60Vrms is applied to a
single telephone set. It is important that the RM pin is only set high during ringing and that
this pin is set low at all other times.
During ringing the integral DC/DC converter is switched by RM (H) to produce a battery
voltage of 72V. This will produce greater than 40Vrms into 3 telephones (with tone
ringers). The slope of the edges on the ringing waveform is set internally to give the
correct waveform with 20Hz to 25Hz ringing frequency.
When an “off-hook” condition occurs during ringing, the ring-trip circuit on the Ag1171
senses the loop current flowing and signals the off-hook condition on the SHK output. The
SHK signal must be “de-bounced” (by the controlling processor) for 10ms to remove any
spurious pulses. The DC/DC controller limits the power. The Ag1171 will operate
continuously with a ring-trip load (but this is not recommended as the power dissipation is
high). The ring-trip function will operate up to a loop resistance of typically 470R (including
300R telephone).
© Silver Telecom 2006
6

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
AG1170

Low Power Ringing SLIC

Siliver
Siliver
AG1171

Low Power Ringing SLIC

Siliver
Siliver


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