參數(shù)資料
型號(hào)： LUCL9217GAR-DT
英文描述： Low-Cost Line Interface with Reverse Battery and PPM
中文描述： 低成本線接口，具有反向電池和PPM
文件頁(yè)數(shù)： 6/30頁(yè)
文件大?。?/td> 414K
代理商： LUCL9217GAR-DT
6
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and PPM
L9217A/G Low-Cost Line Interface
Functional Description
Table 2. Input State Coding
Table 3. Supervision Coding
B0
1
B1
1
B2
1
State/Definition
Powerup, Forward Battery, Normal Overhead.
Normal talk and battery feed state. Pin PT is
positive with respect to PR. On-hook transmission is enabled. PPM is not active. Overhead is un-
affected by resistor OVH and is adequate for 3.14 dBm overload into 900
.
Powerup, Reverse Battery, Normal Overhead.
Normal talk and battery feed state. Pin PT is
negative with respect to PR. On-hook transmission is enabled. PPM is not active. Overhead is un-
affected by resistor OVH and is adequate for 3.14 dBm overload into 900
.
Powerup, Forward Battery, High Overhead.
Normal talk and battery feed state. Pin PT is posi-
tive with respect to PR. On-hook transmission is enabled. PPM is not active. Overhead is in-
creased via resistor OVH.
Powerup, Reverse Battery, High Overhead.
Normal talk and battery feed state. Pin PT is neg-
ative with respect to PR. On-hook transmission is enabled. PPM is not active. Overhead is in-
creased via resistor OVH.
Low-Power Scan.
Except for off-hook detection, all circuits are shut down to conserve power. Pin
PT is positive with respect to pin PR. On-hook transmission is disabled.
Disconnect.
The tip and ring amplifiers are turned off, and the SLIC goes to a high-impedance
state (>100 k
). Supervision outputs read on hook. Device will power up in this state.
Powerup, Reverse Battery, High Overhead with PPM.
Normal talk and battery feed state. Pin
PT is negative with respect to PR. On-hook transmission is enabled. PPM is active. Overhead is
increased via resistor OVH.
Powerup, Forward Battery, High Overhead with PPM.
Normal talk and battery feed state. Pin
PT is positive with respect to PR. On-hook transmission is enabled. PPM is active. Overhead is
increased via resistor OVH.
1
0
1
1
1
0
1
0
0
0
1
1
0
0
1
0
0
0
0
1
0
NSTAT
0 = off-hook or ring trip.
1 = on-hook and no ring trip.
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