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| 型號： | LUCL9218AAR-D |
| 英文描述： | Low-Cost Line Interface |
| 中文描述： | 低成本線接口 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 378K |
| 代理商： | LUCL9218AAR-D |
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10
Agere Systems Inc.
Data Sheet
November 2001
L9218A/G Low-Cost Line Interface
Electrical Characteristics
(continued)
Table 6. Analog Pin Characteristics
1. Loop closure threshold is programmed by resistor R
LCTH
from pin LCTH to pin DCOUT. The programming equation or relationship between
off-hook threshold and resistor value is different for active mode versus scan mode (see Applications section for more details).
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. I
N
is the sourcing current at RTSN. Guaranteed if I
N
is within 5
μ
A to 30
μ
A.
Parameter
Min
Typ
Max
Unit
Differential PT/PR Current Sense (DCOUT):
Gain (PT/PR to DCOUT)
Offset Voltage at I
LOOP
= 0
Loop Closure Detector Threshold (R
LCTH
= 22.1 k
)
1
:
On- to Off-hook Threshold (scan mode)
Off- to On-hook Threshold (active mode)
Ring Trip Comparator:
Input Offset Voltage
2
Internal Voltage Source
Current at Input RTSP
3
RCVN, RCVP:
Input Bias Current
Input Resistance
121
–100
125
—
129
100
V/A
mV
8.8
6.0
—
—
13.6
10.2
mA
mA
—
–9.1
I
N
– 0.5
±10
–8.6
I
N
—
–8.1
I
N
+ 0.6
mV
V
μ
A
—
—
–0.2
1
–1
—
μ
A
M
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