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L7585G Datasheet, PDF (1/22 Pages) Agere Systems – Full-Feature,Low-Power SLIC and Switch | |||
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Data Sheet
September 2001
L7585G Full-Feature, Low-Power SLIC and Switch
Features
s Low active power
s Quiet tip/ring polarity reversal
s Distortion-free on-hook transmission
s 35 V to 60 V power supply operation
s 14 operating states:
â Forward battery active
â Reverse battery active
â Ground start (3)
â Forward battery ring open
â Reverse battery ring open
â Reverse battery tip open
â High impedance
â Ringing (2)
â Low current (2)
â Disconnect
s Self-test in all operating states
s Independent, adjustable ac and dc parameters:
â Switchhook detector threshold
â Loop current limit
â dc feed resistance
â Termination impedance
s Integrated ringing access relay
s Integrated test-in relay
s Integrated relay driver
s Integrated ring trip detector
s Thermal protection
s 44-pin, metric quad flat package (MQFP)
Description
The L7585G Full-Feature, Low-Power Subscriber
Loop Interface Circuit (SLIC) and Switch integrates
the battery feed, test access relay, and ringing relay
that are necessary to interface a codec to the tip and
ring of a subscriber loop into one low-power, low-cost
package. It is built using a 90 V complementary bipo-
lar (CBIC) process and a 320 V Bipolar-CMOS-
DMOS (BCDMOS) process. The device is available
in a 44-pin MQFP package.
The device can be connected directly to the Agere
Systems Inc. T8531/T8536 16-Channel Programma-
ble Codec Chip Set without the need for any ac inter-
face components.
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