參數(shù)資料
型號： LUCL9217AAR-D
英文描述： GT 3C 3#16S PIN PLUG
中文描述： 低成本線接口，具有反向電池和PPM
文件頁數(shù)： 20/30頁
文件大小： 414K
代理商： LUCL9217AAR-D
20
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and PPM
L9217A/G Low-Cost Line Interface
Applications
(continued)
dc Applications
(continued)
Rate of Battery Reversal
The rate of battery reversal is controlled or ramped by
capacitors FB1 and FB2. A chart showing FB1/FB2 val-
ues versus typical ramp rate is given below. Leave
FB1/FB2 open if it is not desired to ramp the rate of
battery reversal.
Table 13. FB1/FB2 Values vs. Typical Ramp Time
Loop Range
The equation below can be rearranged to provide the
loop range for a required loop current:
Off-Hook Detection
The loop closure detection threshold is set by resistor
R
LCTH
. The supervision output bit NSTAT is high in an
on-hook condition. The off-hook comparator goes low
during an off-hook condition:
Figure 14. Off-Hook Detection Circuit
C
FB1
/C
FB2
0.01
μ
F
0.1
μ
F
0.22
μ
F
0.47
μ
F
1.0
μ
F
1.22
μ
F
1.3
μ
F
1.4
μ
F
1.6
μ
F
Transition Time
20 ms
220 ms
440 ms
900 ms
1.8 s
2.25 s
2.5 s
2.7 s
3.2 s
R
L
----------------------------
I
L
2R
P
–
R
DC
–
=
I
TR
(mA) = 0.4167 R
LTCH
(k
) –1.9 mA
ACTIVE off-hook to on-hook
I
TR
(mA) = 0.4167 R
LTCH
(k
) + 2.7 mA
SCAN on-hook to off-hook
R
L
ITR
R
P
R
P
RING
–
+
–
+
DCOUT
R
LCTH
LCTH
NSTAT
TIP
0.125 V/mA
0.05 mA
12-2553 (F)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LUCL9217AAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9217GAR-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9217GAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and PPM
LUCL9218AAR-D 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface
LUCL9218AAR-DT 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface
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