LUCL9312AP-D AGERE [Agere Systems], LUCL9312AP-D Datasheet - Page 4

• Manufacturer Part Number: LUCL9312AP-D
• Description: Line Interface and Line Access Circuit Forward Battery SLIC and Ringing Relay for TR-57 Applications
• Manufacturer: AGERE [Agere Systems]

Forward Battery SLIC and Ringing Relay for TR-57 Applications
Features
4
SLIC and solid-state ring relay integrated into a sin-
gle package
5 V and battery operation
User-defined power control options:
— Automatic battery switch
— Power control resistor
— Package thermal capabilities
Minimal external components required
Operating states:
— Forward active
— Scan
— All-off or disconnect
— Ring
Ultralow power:
— Scan, 15 mW
— Active states, on-hook, 75 mW
— Ring mode, on-hook, 90 mW
— Disconnect, 10 mW
Adjustable overhead voltage:
— Default overhead adequate for 3.14 dB into
— Controlled rate of overhead adjustment
Latched parallel input data interface with reset
Adjustable current limiter:
— 10 mA to 45 mA programming range
Adjustable loop closure detector with hysteresis:
— 4 mA detect, 2.5 mA no detect minimum, upper
— Hysteresis, typical 20% of programmed on-hook
Ring trip detector:
— Single-pole filtering
Thermal shutdown protection with hysteresis
Line break switch will foldover into a low-current
state under high-voltage fault conditions
Battery out-of-range monitor circuit:
— All-off upon loss of battery (low battery condition)
— All-off upon high battery (fault condition)
Longitudinal balance:
— TR-57 balance
RFI/EMC-CISP-22
900
limit of 15 mA detect
to off-hook threshold
overload
Description
The L9312 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:
The second chip is manufactured in Agere dielectrically
isolated 320 V bipolar CMOS diffused metal oxide
semiconductor (BCDMOS III) technology. This chip
contains the following:
The LILAC family requires a +5 V and battery supply to
operate. No –5 V supply is required. A battery switch is
included that automatically, based on subscriber loop
length, will apply either the primary higher-voltage bat-
tery or an optional lower-voltage auxiliary battery. Use
of this feature will minimize off-hook power dissipation.
* Telcordia Technologies is a trademark of Bell Communications
Research, Inc.
Integrated 2 Form C ring relay:
— Low impulse noise
— Current-limited switches
— Break-before-make and make-before-break
Meets Telcordia Technologies * GR1089 require-
ments with external protection device
44-pin, surface-mount plastic package (PLCC)
ac transmission path
dc feedback and functions
Active dc current limit
Active mode loop supervision
Thermal shutdown
Ring access relay
Scan clamp circuitry
Logic control
Ring trip
Thermal shutdown
Battery monitor circuit
switching
Agere Systems Inc.
July 2001