PEF4264TV21XT Lantiq, PEF4264TV21XT Datasheet - Page 15

• Manufacturer Part Number: PEF4264TV21XT
• Manufacturer: Lantiq

Specifications of PEF4264TV21XT

• Polarity Reversal: Yes
• On-chip Ring Relay Driver: No
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Pin Count: 22
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

2
A functional block diagram is shown in
SLIC-S V2.1 supports AC and DC control loops based on feeding a voltage
transversal line current
In receive direction, DC and AC voltages are handled separately with different gains. Both are applied differentially
via the codec interface pins DCP / DCN and ACP / ACN, respectively, defining the transversal line voltage V
through
V
= 30 * (
= 60 * (
As the ring signal is processed in the DC path, the DC gain is doubled in the ring mode ACTR to enable the full
output voltage swing.
The common mode line voltage is always equal to the mean supply voltage,
symmetrical line potentials with respect to the supplies. Depending on the operation mode,
to
an external diode.
A reversed polarity of
In transmit direction, the transversal and longitudinal line currents
scaled images are provided at the IT and IL pins, respectively:
I
I
For off-hook detection in PDRH mode, 5 k resistors are connected from TIP to BGND and from RING to VBATH,
respectively. The currents through these resistors,
I
Figure 7
Preliminary Data Sheet
IT
Trans
IT0
TR
V
= (
= (
HR
=
= (
I
V
T
I
or to BGND via the VH switch, whereas
T0
V
V
TIP
+
I
DCP
DCP
T
+
I
+
–
R
I
) / 100 =
I
R0
V
Functional Description
–
–
Transversal and Longitudinal Line Currents
R
RING
) / 2
) / 10 =
V
V
DCN
DCN
=
) + 6 * (
) + 6 * (
V
I
Trans
ab
V
I
TRANS0
I
TR
Trans
=
is easily obtained by changing the polarity of (
/ 50
V
V
V
V
RING
ACP
ACP
and the longitudinal current
TIP
/ 5
–
–
V
V
ACN
ACN
Figure
) for modes ACTH, ACTL
) for mode ACTR
V
TR
V
6.
BI
I
I
T
R
is connected either to
I
T0
TIP
RING
and
15
I
Trans
I
I
I
IL
Long
Long
Z
Z
I
L
L
R0
= (
/2
/2
.
, are sensed, scaled and provided at IT:
= (
I
T
I
–
T
I
–
I
R
I
Trans
Long
) / 200 =
I
R
) / 2
V
V
and
BATH
DCP
I
–
I
Long
via the VBAT switch or to
Long
V
V
V
DCN
CM
TR
(Figure
/ 100
).
to the line and sensing the
= (
V
Long
PEF 4264 / PEF 4364
Revision 2.0, 2006-10-10
V
Functional Description
HI
7) are measured, and
SLIC-S / TSLIC-S
+
V
HI
V
BI
is switched either
) / 2, leading to
V
BATL
via
TR