L9219A データシートの表示（PDF） - Agere -> LSI Corporation
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L9219A Datasheet PDF : 30 Pages
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L9219A/G Low-Cost Line Interface
with Reverse Battery and Dual Current Limit
Data Sheet
November 2001
Functional Description
Table 2. Input State Coding
B0 B1 B2
State/Definition
1 1 1 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 RPROG resistor.
1 0 1 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 RPROG resistor.
1 1 0 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 RPROG resistor.
1 0 0 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 RPROG resistor.
0 1 1 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.
0 0 1 Disconnect. The tip and ring amplifiers are turned off, and the SLIC goes to a high-impedance
state (>100 kΩ). Supervision outputs read on hook. Device will power up in this state.
0 0 0 Disconnect. The tip and ring amplifiers are turned off, and the SLIC goes to a high-impedance
state (>100 kΩ). Supervision outputs read on hook. Device will power up in this state.
0 1 0 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.
Table 3. Supervision Coding
NSTAT
0 = off-hook or ring trip.
1 = on-hook and no ring trip.
TSD
0 = Normal device operation.
1 = Device is in thermal shutdown.
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Agere Systems Inc.
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