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AG1460 Schematic ( PDF Datasheet ) - Silver

Teilenummer AG1460
Beschreibung QUAD 5V RINGING SLIC
Hersteller Silver
Logo Silver Logo 




Gesamt 15 Seiten
AG1460 Datasheet, Funktion
www.DataSheet4U.com
Silver
TELECOM
V1.4 May 2004
Data Sheet
Ag1460
QUAD 5V RINGING SLIC
TIP1
RING1
RINGING
SLIC1
VIN1
VOUT1
FEATURES
• Four highly featured SLICs in a 72 pin
SIMM or 56 pin DIL format.
TIP2
RING2
TIP3
RING3
RINGING
SLIC2
RINGING
SLIC3
VIN2
VOUT2
VIN3
VOUT3
• Integral DC-DC converter. No battery
voltage supply needed.
• Highly integrated with on board ringing
generator.
• Tip/Ring polarity reversal, On-Hook
Transmission for caller line ID.
TIP4
RING4
RINGING
SLIC4
VIN4
VOUT4
• “Soft Shutdown” over current and
thermal protection provides fail-safe
operation.
Control and
Supervision
• Minimum number of external
components.
• Simplified protection in “on-premise”
applications.
DESCRIPTION
The Silver Telecom Ag1460 series comprises
four individual single Subscriber Line
Interface Circuits (SLICs) in a 72-pin SIMM or
56 pin DIL format. The combination of
features and packaging offers extremely
efficient use of board area, saving significant
system size and cost, maximising time to
market for Telephony Systems developers.
• Silver Telecom “design-in” assistance.
The Ag1460 has integral dc/dc converter and
ringing generation thus providing all the line
powering requirements from a single supply.
The SLIC requires a minimum of external
components.
The system interface has been designed for
connection to all popular codecs of both the
audio and signalling connections.
The Ag1460 has been designed to work with
loop lengths of up to 3.0km (800including
telephone), with both resistive and complex
line impedances. Its performance to
regulatory standards allows use in public and
private network applications.
The Ag1460 is ideal for low line count, short
loop length applications, such as ISDN
Terminal Adaptors, Internet Telephony (VoIP),
Computer Telephony Integration (CTI), Digital
Loop Carriers (DLC), Wireless Local Loops
(WLL) and Small Office Home Office (SOHO).
© Silver Telecom 2004






AG1460 Datasheet, Funktion
V1.4 May 2004
Data Sheet
Ag1460
QUAD 5V RINGING SLIC
1.0 Line Interfacing
As well as being in an electrically demanding
environment, the needs of different applications and
regulatory standards means that the SLIC must allow
flexibility, together with facilities to ensure robust
performance. All four of the SLICs on the Ag1460
provide a complete and flexible interface to the
telephone line.
The battery feed to the telephone line is generated
from the positive supply rail. This provides a -48V
battery feed to the line, except during ringing, when this
is increased to -72V. The loop current is pre-set to a
constant 24mA. If the loop length is such that the
constant current feed cannot be maintained (i.e. >3km),
then the Ag1460 will revert to a constant voltage
source, allowing the loop to be serviced at a reduced
loop current.
1.1 Battery Feed
The Ag1460 has an integral DC-DC converter which
generates the battery voltages in the device. This
means that only a supply of +5V, and GND is needed,
unlike conventional SLICs which will 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.
1.2 Ringing
The ringing signal is generated by switching the
appropriate 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.
During ringing the DC-DC converter automatically
Signal
Condition 1 - DC operation
Notes
INPUT RM
1
0
OUTPUT SHK 1
0
Off Hook
No ringing
Off hook detected
NOTE: SHK SHOULD
BE DE-BOUNCED
Condition 2 - Ringing On-hook
Condition 3 - Ringing/Off-hook
1
RM
0
1 sec
3 sec
1 sec
3 sec
F/R 1
(input) 0
SHK 1
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
from F/R..
As long as the telephone is off hook, SHK will remain high.
AB
Figure 3: Ringing Signal Waveforms
© Silver Telecom 2004

6 Page









AG1460 pdf, datenblatt
V1.4 May 2004
Data Sheet
DC Electrical Characteristics.
Ag1460
QUAD 5V RINGING SLIC
Characteristic
Sym Min Typ* Max Units Test Comments
1
Supply Current (per SLIC),
on- hook1
IVPWR
Maximum DC-DC converter
2 current consumption (3 channels
off hook, 1 channel ring trip)
IDC
3
DC-DC converter current
consumption (all channels idle)
PDC
4
Current consumption while
powered down
IPD
200 mA
1500
mA
250 mA
55 75 mA
5 Wake-up time
50 ms
6 Constant current feed to line
7
Tip/Gnd or Ring/Gnd or
Tip&Ring/Gnd overcurrent
Off-Hook detect
9 Output Low Voltage
Output High Voltage
Off-Hook Detect
10 Output Low Voltage
Output High Voltage
Control Inputs, F/R, LO, PD
11 Input Low Voltage
Input High Voltage
Control Inputs, F/R, LO, PD
12 Input low current
Input high current
13 Switch Hook Detect Threshold
ILOOP 21.5 24 26.5 mA RLOOP = 500
35.0 mA
VOL
VOH 3.15
VOL
VOH 3.5
0.9 V @ 0.4mA
V @ -0.4mA
0.4
V
V
@ 50uA
@ -50uA
VIL
VIH 4.0
0.3 V
V
IIL -0.5
IIH
mA
0.5 mA
10.0 mA
14 Load on Vout
10.0
kohm 100nF coupling
1) All DC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless otherwise stated.
2) Operating currents are dependant on the users application.
*Typical figures are at 25°C with nominal 5V supply and are for design aid only.
© Silver Telecom 2004

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