PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 157
PEB3265
Manufacturer Part Number
PEB3265
Description
(PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB3265.pdf
(383 pages)
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DuSLIC
Interfaces
Preliminary
High Impedance (HIR/HIT/HIRT): In this mode each of the line outputs can be
programmed to show high impedance. HIT switches off the TIP buffer, while the current
through the RING output still can be measured by IT or IL. Programming HIR switches
off the RING buffer. In the mode HIRT both buffers show high impedance.
Active (ACTL, ACTH): These are the regular transmit and receive modes for voice
V
V
V
band. The line driving section is operated between
,
and
.
BATL
BATH
BGND
Active Ring (ACTR): In order to provide a balanced ring signal of up to 85 Vrms or to
drive longer telephone lines, an auxiliary positive battery voltage
V
is used, making
HR
possible a higher voltage across the line. Transmission performance remains
unchanged compared with Active modes.
The Power Down modes are intended to reduce the power consumption of the linecard
to a minimum: the SLIC-E/-E2 is switched off completely, no operation is available.
With respect to the output impedance of TIP and RING, three Power Down modes have
to be distinguished:
V
A resistive one (PDRH) provides a connection of 5 k each from TIP to
and RING
BGND
to
V
, respectively, while the outputs of the buffers show high impedance. The
BATH
current through these resistors is sensed and transferred to the IT pin to allow off-hook
supervision.
PDRHL is used as a transition mode at a mode change from PDRH mode to ACTH mode
(automatically initiated by SLICOFI-2 at a mode change from PDRH to ACTH).
The other mode (PDH) offers high impedance at TIP and RING.
Data Sheet
157
2000-07-14
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