PEB 4364 T V1.2 Infineon Technologies, PEB 4364 T V1.2 Datasheet - Page 111

• Manufacturer Part Number: PEB 4364 T V1.2
• Description: IC SLIC VOICE ACCESS PDSO-36
• Manufacturer: Infineon Technologies
• Series: DuSLICr

Specifications of PEB 4364 T V1.2

• Function: Dual Channel Subscriber Line Interface Circuit (DuSLIC)
• Interface: IOM-2, PCM
• Number Of Circuits: 2
• Voltage - Supply: 3.3 V ~ 5 V
• Current - Supply: 105mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-PDSO
• Includes: DTMF Generator and Decoder, Line Echo Cancellation (LEC), Teletax (TTX) Generation, Universal Tone Detection (UTD)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEB4364TV1.2XT; SP000007728

3.8.2.9
The DC loop resistance can be determined by supplying a constant DC voltage V
to the Ring- and Tip line and measuring the DC loop current via IT pin. The following
steps are necessary to accomplish this:
•
•
•
•
•
•
In order to increase the accuracy of the result, either the current offset can be
compensated or the measurement can be done differentially. The latter approach
eliminates the current- and voltage offsets.
Figure 45
Figure 45
Preliminary Data Sheet
Program a certain ring offset voltage RO1, RO2, RO3 (see DuSLICOS DC Control
Parameter 2/4).
Select ring offset voltage RNG-OFFSET[1:0] in register LMCR3 either to 01, 10 or 11.
If 00 is selected, the DC regulation would be still active and would not allow
resistance measurement.
Choose an operation mode, either Active High (ACTH) or Ring Pause.
Select the DC path for level meter by setting the bits LM-SEL[3:0] in register LMCR2
to 0101 (DC current on IT).
The transversal current can be determined by reading the level meter result registers
LMRES1, LMRES2.
Based on the known constant output voltage V
RNG-OFFSET[1:0]) and the measured I
calculated. It should be noted that the calculated resistance includes also the
onboard resistors R
R
I
LINE
LINE
shows an example circuit for resistance measurement:
Loop Resistance Measurements
Example Resistance Measurement
R
R
LINECARD
PROT
PROT
* DC Offset Voltage
according to
RNG-OFFSET[1:0]
+ R
+ R
V
STAB
STAB
TR,DC
PROT
*
and R
STAB
SLIC
.
111
TRANS
line current sense signal
to be measured
DC
DC
IT
IL
P
N
current, the resistance can be
TR,DC
duslic_0011_measurement_tip_ring
(DC voltage according to
Operational Description
SLICOFI-2x
DS3, 2003-07-11
DuSLIC
TR,DC