V1.4 May 2004
Data Sheet
Ag1460
QUAD 5V RINGING SLIC
It is the responsibility of the equipment designer to
ensure that their system meets the requirements of the
relevant regulatory bodies. Every effort is made to
ensure that Silver Telecom products are compliant with
the latest standards.
applications to provide primary and secondary
protection circuits to prevent damage to the SLIC.
The Ag1460 has been designed to be able to use low
cost protection components and a typical circuit is
shown in Figure 4. This circuit is suitable for most “on-
premise” applications.
6.0 A Typical Application.
The Ag1460 has been designed to interface to any
Codec, and is shown in a typical application in figure 4.
For examples of the interface to various codecs, either
visit the Silver Telecom web-site at www.silvertel.com,
or contact Silver Telecom or their local representative.
With some additional components, the Ag1460 will
meet UL60950 requirements: a series element should
be added - a combination of a fuse (e.g. 350mA,
Bussman C515 or Littelfuse 220003) and a surge
resistor (25
Ω typically). Alternatively a Teccor F1250T
or F0500T fuse may be used without a surge resistor.
The status outputs from the SLIC are passed to the
micro-controller. These signals can then be processed
as necessary by the system software. Control over the
ringing and reversals functions is achieved via the RM
and F/R pins.
For ITU-T K20 power cross protection, a PTC
thermistor (eg. type JH330L) of 30R is suitable. The
lightning protection is provided by steering diodes
connected to 0V and upgrading D1 to a Tranzorb
device (Motorola or Semitron 1.5KE82A). For lightning
and power cross protection, D1 should be upgraded
further (5KP75).
Just one Tranzorb is needed per
linecard.
The audio signals which are on the 4 wire side of the
connection are coupled by 100nF capacitors to avoid
d.c. level problems between the two devices.
The Ag1460 provides for a 2 wire impedance and a
network balance impedance of 600
Ω.
For other
impedances a DSP codec can be used which can be
programmed using applications information available
from the codec manufacturer. The necessary transfer
function parameters for the Ag1460 are available from
Silver Telecom.
5.0 Approvals.
It can be seen from the Electrical Characteristics given
on subsequent pages that the SLIC has been designed
to meet the equipment standards of as many major
public telephone authorities as possible.
Ag1460 is fixed 600R impedance.
For programmable impedance see Ag1465.
RM
TIP
RING
GND
PWR
+5V
A
F/R
SHK
V
OUT
V
IN
V
CLAMP
PGND
D1
D2
D3
D4
0V
+
+5V
100uF
100nF
100nF
TIP
RING
Ag1460
D1 - D4 = 1N4004 or equivalent
D5 = BZT03C82 (only one needed per linecard)
0V = +5V return
CAP
220nF
10
Ω
220uF
+5V
PWR
D5
GND
A
100nF
+
LO
PD
The Ag1460 will work with any codec.
Analog path
to/from codec
Control signals
to/from codec or
micro-controller
Figure 4: Typical On-Premise Application
(only one channel shown for clarity)
© Silver Telecom 2004
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
