le9500 Zarlink Semiconductor, le9500 Datasheet - Page 13

• Manufacturer Part Number: le9500
• Description: Igh-voltage Ringing Slic Device For Volp Applications
• Manufacturer: Zarlink Semiconductor

•
•
On-Hook Transmission—Reverse Battery
•
•
•
•
•
•
Disconnect
•
•
•
•
Ring
•
•
•
•
Ground Start
•
•
•
Thermal Shutdown
•
•
On-hook transmission is allowed.
The tip to ring on-hook differential voltage will be typically between –41 V and –49 V with a –51 V to –100 V primary battery.
Pin PR is positive with respect to PT.
V
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 typically between –41 V and –49 V with a –51 V to –100 V primary battery.
The tip/ring amplifiers and all supervision are turned off.
The SLIC device goes into a high-impedance state.
NSTAT is forced high (on-hook).
Due to internal pull-ups, device will power up in this state.
Power ring signal is applied to tip and ring.
Input wave form at RING
Ring trip supervision and common-mode current supervision are active; loop closure is inactive.
Overhead voltage is reduced to typically 4 V.
Tip drive amplifier is turned off.
Device presents a high impedance (>100 kΩ) to pin PT.
Device presents a clamped (amplitude <56.5 V) current-limited battery (V
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.
BAT1
is applied to tip/ring drive amplifiers.
INN/P
is amplified.
Zarlink Semiconductor Inc.
13
BAT1
) to PR.