peb4264 Infineon Technologies Corporation, peb4264 Datasheet - Page 16

• Manufacturer Part Number: peb4264
• Description: Peb4264 Subscriber Line Interface Circuit Standard Feature Set
• Manufacturer: Infineon Technologies Corporation

2.1
SLIC-S V2.1 operates in the following modes controlled by ternary logic signals at C1 and C2:
Table 3
C1
1) No ‘Overtemp’ signaling possible via pin C1, if C1 is low.
Table 4
Mode
PDH
PDRH
PDRHL
ACTL
ACTH
ACTR
HIRT
HIT
HIR
Power Down High Impedance (PDH)
PDH offers high impedance at TIP and RING; it can be used for testing purposes or when an error condition
occurs. In PDH mode all functions are switched off. Off-hook detection is not available.
Power Down Resistive High (PDRH)
Power consumption is reduced to a minimum by switching completely off all voice transmission functions. To allow
off-hook detection, PDRH provides a connection of 5 k
respectively, while the output buffers show high impedance (see
sensed, scaled by 1/5 and transferred to the IT pin for off-hook supervision.
Power Down Resistive High Load (PDRHL)
PDRHL is used as a transition state from Power Down to Active modes (automatically initiated during a mode
change). It causes fast preloading of CEXT in order to suppress line voltage transients.
Active Low (ACTL), Active High (ACTH)
These are the regular transmission modes for voiceband. The line-driving section is operated between BGND and
VBATL (ACTL) or VBATH (ACTH).
Active Ring (ACTR)
Utilizing an additional positive battery voltage
of very long telephone lines. In ACTR mode the DC voltage gain is doubled to 60.
Preliminary Data Sheet
Operating Modes
SLIC-S Mode Table
SLIC-S Modes and Supplies
L
M
H
1)
Mode Description
Power Down High Impedance
Power Down Resistive High
Power Down Resistive High Load
Active Low
Active High
Active Ring
High Impedance on RING and TIP
High Impedance on TIP
High Impedance on RING
L
PDH
ACTL
HIRT
V
HR
, this mode allows balanced ringing of up to 65 Vrms or feeding
16
M
PDRHL
ACTH
HIT
each from TIP to BGND and RING to VBATH,
Figure
C2
Internal Supply Voltages
VBATH, VH switch open
VBATH, VH switch open
VBATH, VH switch open
VBATL, BGND
VBATH, BGND
VBATH, VHR
VBATH, VHR
VBATH, VHR
VBATH, VHR
6). The current through these resistors is
PEF 4264 / PEF 4364
Revision 2.0, 2006-10-10
H
PDRH
ACTR
HIR
Functional Description
SLIC-S / TSLIC-S
V
BI
,
V
HI