參數(shù)資料
型號(hào)： LUCL9215GAU-D
英文描述： Short-Loop Sine Wave Ringing SLIC
中文描述： 短回路正弦波振鈴用戶接口
文件頁(yè)數(shù)： 13/50頁(yè)
文件大?。?/td> 1115K
代理商： LUCL9215GAU-D
Data Sheet
September 2001
Short-Loop Sine Wave Ringing SLIC
L9215A/G
Agere Systems Inc.
13
State Definitions
(continued)
On-Hook Transmission with PPM
—
Forward
Battery
I
Pin PT is positive with respect to PR.
I
V
BAT1
is applied to tip/ring drive amplifiers.
I
Supervision circuits, loop closure, and common-
mode detect are active.
I
Ring trip detector is turned off to conserve power.
I
On-hook transmission is allowed.
I
The tip-to-ring on-hook differential voltage will be
between –41 V and –49 V with a –70 V primary bat-
tery.
I
PPM is on.
On-Hook Transmission
—
Reverse Battery
I
Pin PR is positive with respect to PT.
I
V
BAT1
is applied to tip/ring drive amplifiers.
I
Supervision circuits, loop closure, and common-
mode detect are active.
I
Ring trip detector is turned off to conserve power.
I
On-hook transmission is allowed.
I
The tip-to-ring on-hook differential voltage will be
between –41 V and –49 V with a –70 V primary bat-
tery.
I
PPM is off.
On-Hook Transmission with PPM
—
Reverse
Battery
I
Pin PR is positive with respect to PT.
I
V
BAT1
is applied to tip/ring drive amplifiers.
I
Supervision circuits, loop closure, and common-
mode detect are active.
I
Ring trip detector is turned off to conserve power.
I
On-hook transmission is allowed.
I
The tip-to-ring on-hook differential voltage will be
between –41 V and –49 V with a –70 V primary bat-
tery.
I
PPM is on.
Disconnect
I
The tip/ring amplifiers and all supervision are turned
off.
I
The SLIC goes into a high-impedance state.
I
NSTAT is forced high (on-hook).
Ring
I
Power ring signal is applied to tip and ring.
I
Input waveform at RING
IN
is amplified.
I
Ring trip supervision and common-mode current
supervision are active; loop closure is inactive.
I
Overhead voltage is reduced to typically 4 V, regard-
less of programming on OVH, and current limit set at
V
PROG
is disabled.
I
Current is limited by saturation current of the amplifi-
ers themselves, typically 100 mA at 125 °C.
Thermal Shutdown
I
Not controlled via truth table inputs.
I
NSTAT is forced low (off-hook) during this state
I
This mode is caused by excessive heating of the
device, such as may be encountered in an extended
power cross situation.
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