L9310 Datasheet, PDF (4/60 Pages) Agere Systems – Line Interface and Line Access Circuit Full-Feature SLIC,Ringing Relay,and Test Access Device

L9310 Line Interface and Line Access Circuit
Full-Feature SLIC, Ringing Relay, and Test Access Device
Data Sheet
July 2001
Features
s SLIC, solid-state ring relay, and line test access, inte-
grated into a single package
s 5 V and battery operation
s User-defined power control options:
— Automatic battery switch
— Power control resistor
— Package thermal capabilities
s Minimal external components required
s Operating states:
— Forward active
— Reverse active (controlled rate of reversal)
— Scan
— Ground start (tip open)
— All-off or disconnect
— Ring
— Periodic pulse metering (PPM) active modes
— Line test modes (dc/ac line voltage/current)
s Ultralow power:
— Scan, 15 mW
— Active states, on-hook, 75 mW
— Ring mode, on-hook, 90 mW
— Disconnect, 10 mW
s Adjustable overhead voltage:
— Default overhead adequate for 3.14 dB into
900 Ω overload
— Controlled rate of overhead adjustment
s Latched parallel input data interface with reset
s Interrupt (unlatched) based loop status monitor
s Adjustable current limiter:
— 10 mA to 70 mA programming range
s Adjustable loop closure detector with hysteresis:
— 4 mA detect, 2.5 mA no detect minimum, upper
limit of 15 mA detect
— Hysteresis, typical 20% of programmed on-hook
to off-hook threshold
s Ring trip detector:
— Single-pole filtering
s Thermal shutdown protection with hysteresis
s Line break switch will foldover into a low-current
state under high-voltage fault conditions
s Battery out-of-range monitor circuit:
— All-off upon loss of battery (low battery condition)
— All-off upon high battery (fault condition)
s Longitudinal balance:
— ETSI/ITU-T, GR-909 balance
s Ground start:
— Tip open state
— Ring ground detector
s Ground key:
— Tip/ring ground detector
s Meter pulse compatible:
— Dedicated meter pulse signal input
— On-hook transmission of PPM (up to 5 Vrms)
— Provides convenient access for hybrid filtering of
meter pulse
s Line test:
— Line test modes (ac or dc):
1. Voltage tip to ground
2. Voltage ring to ground
3. Voltage tip to ring
4. Current tip to ring
5. Current tip to ground
6. Current ring to ground
— Inject test tones through codec interface or dedi-
cated input pin
— Analog output at dedicated output pin
s RFI/EMC-EN 300 386-2 V1.1.3 (1997-12)
s Integrated 2 Form C ring relay:
— Low impulse noise
— Current-limited switches
— Break-before-make and make-before-break
switching
s Meets ITU-T K20, ITU-T K21, and Telcordia*
GR1089 requirements with external protection
device
s 44-pin, surface-mount plastic package (PLCC)
Description
The L9310 electronic line interface and line access cir-
cuit (LILAC) provides all the functions that are neces-
sary to interface a codec to the tip and ring of a
subscriber loop, integrating the battery feed and ringing
access relay in one low-power, low-cost package. The
physical construction of the device is two chips. The
first chip is manufactured in Agere 90 V complemen-
tary bipolar integrated circuit (CBIC-S) technology. This
chip contains the SLIC functionality:
s ac transmission path
s dc feedback and functions
s Active dc current limit
s Active mode loop supervision
s Thermal shutdown
* Telcordia is a trademark of Bell Communications Research, Inc.
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Agere Systems Inc.