LE79R70-1DJC Zarlink, LE79R70-1DJC Datasheet - Page 14

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LE79R70-1DJC

Manufacturer Part Number
LE79R70-1DJC
Description
SLIC 1-CH 40dB 110mA 5V 32-Pin PLCC Tube
Manufacturer
Zarlink
Datasheet

Specifications of LE79R70-1DJC

Package
32PLCC
Number Of Channels Per Chip
1
Polarity Reversal
Yes
Longitudinal Balanced
40(Min) dB
Loop Current
110 mA
Minimum Operating Supply Voltage
4.75 V
Typical Operating Supply Voltage
5 V
Typical Supply Current
6.5 mA

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Part Number:
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Manufacturer:
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Part Number:
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RING-TRIP COMPONENTS
R
Ring waveform rise time ≈ 0.214 • (R
For a 1.25 crest factor @ 20 Hz, tr ≈ 10 mS.
∴ (R
C
R
C
R
SLEW
SLEW
RT2
RT
RT1
where R
SLEW
=
=
=
, C
should be changed if a different crest factor is desired.
1.5 µF
12 kΩ
320 CF
SLEW
= 150 kΩ, C
LRT
= Loop-detection threshold resistance for ring trip and CF = Crest factor of ringing signal (≈ 1.25)
Battery
----------------------------------------------------------------------------------------------------------------------------------------- -
V
0
BAT1
SLEW
R
L
5
= 0.33 µF.)
b
a
(
24 µA 320 CF
I
SLEW
L
Feed current programmed by R
V
• C
BAT1
A
Figure 2. Ringing Waveforms
SLEW
B
Figure 3. Feed Programming
) ≈ tr.
(
Zarlink Semiconductor Inc.
This is the best time for
switching between RINGING
and other states for minimizing
detect switching transients.
R
SLIC
LRT
+
150
14
+
2R
RSN
RDC
F
)
DC1
)
(
and R
R
LRT
+
DC2
150
R
R
+
DC2
DC1
2R
F
Ringing Reference
(Input to R
)
B(RING)
A(TIP)
C
DC
SLEW
)

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