LUCL9313AP-D AGERE [Agere Systems], LUCL9313AP-D Datasheet - Page 12

• Manufacturer Part Number: LUCL9313AP-D
• Description: Line Interface and Line Access Circuit Full-Feature SLIC and Ringing for TR-57 Applications
• Manufacturer: AGERE [Agere Systems]

Full-Feature SLIC and Ringing Relay for TR-57 Applications
State Definitions
Primary Control Modes
Ground Start
Ringing
Disconnect—Break Before Make
Tip Amp
12
Tip amplifier is on, tip break switch is open.
The device presents a high impedance (>100 k ) to
pin PT and a current-limited battery (V
Common-mode current detector is on.
Ring trip detector is off.
Output RGDET indicates current flowing in the ring
lead.
This is not a defined state in the primary control
mode table. It is achieved via the powerup and the
ring amp states in the primary control mode table.
Switch break switches (SW1 and SW2) are open,
and ring access switches (SW3 and SW4) are
closed.
Tip/ring drive amplifiers are powered down.
Ring trip circuit is active.
Loop supervision and common-mode current detec-
tors are powered down.
NSTAT represents the ring trip detector status.
The tip and ring amplifiers are turned off to conserve
power.
Break switches (SW1 and SW2) are open, and ring
access switches (SW3 and SW4) are open. This
mode is also used as a transitional mode to achieve
break-before-make switching from the power ring to
active or scan mode.
All supervision circuits are powered down; NSTAT
overrides the actual loop condition and is forced high
(on-hook).
Tip side break switch is closed, and ring side break
switch and ring access switches are open.
SLIC mode is unaffected by reconfiguring the ring
relay via this mode; thus, SLIC will remain in the
mode it was in prior to selecting this mode.
(continued)
(continued)
BAT2
) to PR.
Ring Amp
Reset
Special States
Thermal Shutdown
Battery Out of Range
Ring side break switch is closed; tip side break
switch and ring access switches are open.
SLIC mode is unaffected by reconfiguring the ring
relay via this mode; thus, SLIC will remain in the
mode it was in prior to selecting this mode.
Selection of device reset via the RESET pin will set
the device into the disconnect break-before-make
state.
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.
Upon reaching the thermal shutdown temperature,
the device will enter an all-off mode.
Upon cooling, the device will re-enter the state it was
in prior to thermal shutdown.
Hysteresis is built in to prevent oscillation. In this
mode, supervision output NSTAT is forced low
(off-hook) regardless of loop status or if the discon-
nect logic state is selected.
Not controlled via truth table inputs.
This mode is caused by a battery out of range; that
is, the battery voltage rising above or below a speci-
fied threshold.
Upon reaching the specified high or low battery volt-
age, the device will enter an all-off mode.
Upon the battery returning to the specified normal
operating range, the device will re-enter the state it
was in prior to the low battery shutdown.
Hysteresis is built in to prevent oscillation. In this
mode, supervision output NSTAT is forced low
(off-hook) regardless of loop status or if the discon-
nect logic state is selected.
September 2001
Agere Systems Inc.