L8576B Datasheet, PDF (1/26 Pages) Agere Systems – Dual Ringing SLIC

Data Sheet
May 2001
L8576B Dual Ringing SLIC
Features
s Two SLIC channels for multiple tip/ring interfaces
s On-chip balanced ringing generator, no ring relay
required
s Single battery operation or optional automatic bat-
tery switch
s Quiet battery reversal for on-hook signaling
s Disconnect state
s Distortion-free, on-hook transmission
s 24 mA loop current limiter
s Ring trip detector
s Switchhook detector
s Immune to channel crosstalk and impulse noise
s Allows rail overvoltages for ease of protection
s Thermal protection
s 44-pin, surface-mount, plastic package (PLCC)
Applications
s POTS for ISDN
s Terminal adapters (TA)
s Digital loop carrier (DLC) systems
s PABX
Description
The Agere Systems Inc. L8576B electronic dual sub-
scriber line interface circuit (SLIC) provides all the
functions that are necessary to interface a codec to
the tip and ring of a subscriber loop, integrating two
battery feeds and ringing generators in one low-cost
package. The L8576B device is optimized to meet
the needs of short loop, customer premises applica-
tions and features balanced ringing from the single
battery supply. The device is built using a 90 V com-
plementary bipolar (CBIC) process. It is available in a
44-pin PLCC package.