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LUCL9500AGF-D Datasheet

  • LUCL9500AGF-D

  • High-Voltage Ringing SLIC for VolP Applications

  • 585.76KB

  • 32頁

  • AGERE

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L9500A
High-Voltage Ringing SLIC for VoIP Applications
Preliminary Data Sheet
September 2001
State Definitions
Forward Active
s
s
s
s
s
On-Hook Transmission
鈥?/div>
Reverse Battery
s
s
Pin PR is positive with respect to PT.
V
BAT1
is applied to tip/ring drive amplifiers.
Supervision circuits, loop closure, and common-
mode detect are active.
Ring trip detector is turned off to conserve power.
On-hook transmission is allowed.
The tip-to-ring on-hook differential voltage will be typ-
ically between 鈥?1 V and 鈥?9 V with a 鈥?0 V primary
battery.
Pin PT is positive with respect to PR.
s
V
BAT2
is applied to tip/ring drive amplifiers.
Loop closure and common-mode detect are active.
Ring trip detector is turned off to conserve power.
Overhead is set to nominal 6.0 V for undistorted
transmission of 3.14 dBm into 900
鈩?
s
s
s
Reverse Active
Disconnect
s
s
s
s
s
Pin PR is positive with respect to PT.
V
BAT2
is applied to tip/ring drive amplifiers.
Loop closure and common-mode detect are active.
Ring trip detector is turned off to conserve power.
Overhead is set to nominal 6.0 V for undistorted
transmission of 3.14 dBm into 900
鈩?
s
The tip/ring amplifiers and all supervision are turned
off.
The SLIC goes into a high-impedance state.
NSTAT is forced high (on-hook).
Device will power up in this state.
s
s
s
Scan
s
Ring
s
s
s
Except for loop closure, all circuits (including ring trip
and common-mode detector) are powered down.
On-hook transmission is disabled.
Pin PT is positive with respect to PR, and V
BAT1
is
applied to tip/ring.
The tip to ring on-hook differential voltage will be typ-
ically between 鈥?4 V and 鈥?1 V with a 鈥?0 V primary
battery.
Power ring signal is applied to tip and ring.
Input waveform at RING
IN
is amplified.
Ring trip supervision and common-mode current
supervision are active; loop closure is inactive.
Overhead voltage is reduced to typically 4 V.
Current is limited by saturation current of the amplifi-
ers themselves, typically 100 mA at 125 擄C.
s
s
s
s
s
On-Hook Transmission
鈥?/div>
Forward Battery
s
s
s
Ground Start
s
Tip drive amplifer is turned off.
Device presents a high impedance (>100 k鈩? to pin
PT.
Device presents a clamped (<56.5 V) current-limited
battery (V
BAT1
) to PR.
Output pin RGDET indicates current flowing in the
ring lead.
Pin PT is positive with respect to PR.
s
V
BAT1
is applied to tip/ring drive amplifiers.
Supervision circuits, loop closure, and common-
mode detect are active.
Ring trip detector is turned off to conserve power.
On-hook transmission is allowed.
The tip-to-ring on-hook differential voltage will be typ-
ically between 鈥?1 V and 鈥?9 V with a 鈥?0 V primary
battery.
s
s
s
s
s
Thermal Shutdown
s
s
Not controlled via truth table inputs.
This mode is caused by excessive heating of the
device, such as may be encountered in an extended
power-cross situation. NSTAT output is forced low or
off hook during a thermal shutdown event.
Agere Systems Inc.
10

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