參數(shù)資料
型號(hào): L9219A
英文描述: CAP CER 390PF 3.15KVDC R3 RAD
中文描述: 低成本線接口,具有反向電池和雙電流限制
文件頁(yè)數(shù): 6/30頁(yè)
文件大?。?/td> 397K
代理商: L9219A
6
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and Dual Current Limit
L9219A/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 talk and battery feed state. Pin PT is positive with respect to
PR. On-hook transmission is enabled. Current limit is set per R
PROG
resistor.
Powerup, Reverse Battery.
Normal talk and battery feed state. Pin PT is negative with respect
to PR. On-hook transmission is enabled. Current limit is set per R
PROG
resistor.
Powerup, Forward Battery, High Current Limit.
Normal talk and battery feed state. Pin PT is
positive with respect to PR. On-hook transmission is enabled. Current limit is a nominal 1.4 times
higher than setting per R
PROG
resistor.
Powerup, Reverse Battery, High Current Limit.
Normal talk and battery feed state. Pin PT is
negative with respect to PR. On-hook transmission is enabled. Current limit is a nominal 1.4 times
higher than setting per R
PROG
resistor.
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.
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.
Low-Power Scan.
Except for off-hook suppression, all circuits are shut down to conserve power.
Pin PT is positive with respect to pin PR. On-hook transmission is disabled.
1
0
1
1
1
0
1
0
0
0
1
1
0
0
1
0
0
0
0
1
0
NSTAT
TSD
0 = off-hook or ring trip.
1 = on-hook and no ring trip.
0 = Normal device operation.
1 = Device is in thermal shutdown.
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