le9500 Zarlink Semiconductor, le9500 Datasheet - Page 5

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

PIN DESCRIPTIONS
Pin Name
RING
RING
DCOUT
NSTAT
RTFLT
RCVN
AGND
BGND
V
RCVP
V
V
VITR
V
VTX
CF2
CF1
FB2
FB1
V
PROG
ITR
TXI
NC
PR
PT
B2
B1
B0
BAT1
BAT2
REF
CC
INN
INP
Ground
Ground
Output
Output
Output
Output
Output
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
—
—
—
—
—
—
Loop Closure Detector Output—Ring Trip Detector Output. When Low, this logic output indicates that
an off-hook condition exists or ringing is tripped or a ring ground has occurred.
Transmit AC Output Voltage. Output of internal AAC amplifier. This output is a voltage that is directly
proportional to the differential AC tip/ring current.
Receive AC Signal Input (Non inverting). This high-impedance input controls to AC differential voltage
on tip and ring. This node is a floating input.
Receive AC Signal Input (Inverting). This high-impedance input controls to AC differential voltage on tip
and ring. This node is a floating input.
Power Ring Signal Input. Couple to a sine wave or lower crest factor low-voltage ring signal. The input
here is amplified to provide the full power ring signal at tip and ring. This signal may be applied
continuously, even during nonringing states.
Power Ring Signal Input. Couple to a sine wave or lower crest factor low-voltage ring signal. The input
here is amplified to provide the full power ring signal at tip and ring. This signal may be applied
continuously, even during nonringing states.
DC Output Voltage. This output is a voltage that is directly proportional to the absolute value of the
differential tip/ring current. This is used to set ring trip threshold.
Filter Capacitor. Connect a capacitor from this node to ground.
Filter Capacitor. Connect a capacitor from this node to CF2.
Ring Trip Filter. Connect this lead to DCOUT via a resistor and to AGND with a capacitor to filter the ring
trip circuit to prevent spurious responses. A single-pole filter is needed.
SLIC Device Internal Reference Voltage. Output of internal 1.5 V reference voltage.
Analog Signal Ground.
Analog Power Supply. 3.3 V typical.
Battery Supply 1. High-voltage battery.
Battery Supply 2. Lower-voltage battery.
Battery Ground. Ground return for the battery supplies.
No Connection.
Current-Limit Program Input. Connect this pin to ground to set current limit to 25 mA; leave this pin open
to set current limit to 40 mA.
Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node for controlling rate of battery
reversal. If ramped battery reversal is not desired, leave this pin floating.
Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node for controlling rate of battery
reversal. If ramped battery reversal is not desired, leave this pin floating.
Protected Tip. The output drive of the tip amplifier and input to the loop-sensing circuit. Connect to loop
through overvoltage and overcurrent protection.
Protected Ring. The output drive of the ring amplifier and input to the loop sensing circuit. Connect to
loop through overvoltage and overcurrent protection.
State Control Input. These pins have an internal 150 kΩ pull-up.
State Control Input. These pins have an internal 150 kΩ pull-up.
State Control Input. These pins have an internal 150 kΩ pull-up.
Transmit Gain. Input to AX amplifier. Connect a 4.75 kΩ resistor from this node to VTX to set transmit
gain. Gain shaping for termination impedance with a first-generation codec is also achieved with a network
from this node to VTX.
AC Output Voltage. Output of internal AX amplifier. The voltage at this pin is directly proportional to the
differential tip/ring current.
AC/DC Separation. Input to internal AAC amplifier. Connect a capacitor from this pin to VTX.
Zarlink Semiconductor Inc.
5
Description