le9531cmqc Zarlink Semiconductor, le9531cmqc Datasheet - Page 8

• Manufacturer Part Number: le9531cmqc
• Description: Ringing Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

Pin Descriptions
DCOUT
RINGP
RINGN
NSTAT
RTFLT
RCVN
RCVP
VREF
VBAT
Name
VITR
IREF
DCF
VCC
Pin
ITR
PR
PT
B2
B1
B0
Output
Output
Output
Output
Output
Output
Power
Power
Input/
Input/
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Loop Closure Detector Output and 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 or thermal shutdown happened.
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, for voice in Active states. This node is a
floating input.
Receive AC Signal Input (Inverting). This high-impedance input controls to AC
differential voltage on tip and ring, for voice in Active states. This node is a floating
input.
Power Ring Signal Input (Non inverting). 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 non-
ringing states.
Power Ring Signal Input (Inverting). 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 non-
ringing 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.
Ring Trip Filter. Connect this lead to DCOUT via a resistor and to GND 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.
SLIC Device Internal Reference Current. Connect a 49.9 kresistor to low noise
analog ground.
Analog Power Supply. 3.3 V typical.
Battery Supply. User adjusted supply per SLIC operation state and device grade.
Protected Tip. The output drive of the tip amplifier and input to the loop-sensing
circuit. Connect to loop through over-voltage and over-current protection.
Protected Ring. The output drive of the ring amplifier and input to the loop sensing
circuit. Connect to loop through over-voltage and over-current protection.
State Control Input. These pins have an internal 100 kpull-down.
State Control Input. These pins have an internal 100 kpull-down.
State Control Input. These pins have an internal 100 kpull-down.
Transmit Gain. Input to AX amplifier. Connect a 6.49 kresistor from this node to
VTX to set transmit gain of 205V/A.
Zarlink Semiconductor Inc.
Le9531
8
Description
Data Sheet