PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 55

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
The low-power SLIC-P is optimized for power-critical applications (e.g. intelligent ISDN
network termination). Internal ringing can be used up to 85 Vrms balanced or 50 Vrms
unbalanced. For lowest power applications where external ringing is preferred, three
different battery voltages (
consumption of the application.
SLIC-E/-E2 and SLIC-P differ in supply voltage configuration and the ring voltages at Tip
and Ring
Both internal and external ringing is activated by switching the DuSLIC to ringing mode
by setting the CIDD/CIOP bits M2, M1, M0 to 101.
External Ringing Support by DuSLIC
The following settings have to be made:
• Enabling the use of an external ring signal generator by setting bit REXT-EN in
• A TTL compatible zero crossing signal has to be applied to the RSYNC pin of the
• Activating the ringing mode by setting the CIDD/CIOP bits M2, M1, M0 to 101.
• Setting the DuSLIC internal ring frequency to a value according a factor of about 0.75
The ring relay is controlled by the IO1 pin (see
capability of the IO1 ouput, no additional relay driver is necessary.
The relay is switched:
• Synchronous to the zero crossing of the external ringing frequency
A ring generator delay T
programmed to consider the ring relay delay T
• Asynchronous
The ring relay is switched immediately with the ring command.
1)
Data Sheet
Register BCR2 to 1.
SLICOFI-2x (see
of the external ring frequency.
(bit ASYNCH-R in register XCR set to 0)
(bit ASYNCH-R in register XCR set to 1)
In this case V
of different loop length in the off-hook state.
V
T
BATR
and
is typically used for the on-hook state, while V
V
R
Figure
. External ringing is supported by both SLIC’s.
RING,DELAY
V BATR
26).
1)
,
V BATH
(see DuSLICOS control parameters 2/3) can be
,
V BATL
55
Figure
RING-RELAY,DELAY
) can be used for optimizing the power
BATH
100). Due to the high current drive
and V
BATL
Functional Description
are used for optimized feeding
as shown in
Figure
2000-07-14
DuSLIC
26.