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L7585F Datasheet

  • L7585F

  • Full-Feature,Low-Power SLIC and Switch

  • 416.91KB

  • 22頁

  • AGERE

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Preliminary Data Sheet
September 2001
L7585F Full-Feature, Low-Power SLIC and Switch
Features
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Description
The L7585F 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 PLCC package.
The device can be connected directly to the Agere
Systems Inc. T8531/T8532 16-Channel Programma-
ble Codec Chip Set without the need for any ac inter-
face components.
Low active power
Quiet tip/ring polarity reversal
Distortion-free on-hook transmission
35 V to 60 V power supply operation
14 operating states:
鈥?Forward battery active
鈥?Reverse battery active
鈥?Ground start (3)
鈥?Forward battery ring open
鈥?Reverse battery ring open
鈥?Reverse battery tip open
鈥?High impedance
鈥?Ringing (2)
鈥?Low current (2)
鈥?Disconnect
Self-test in all operating states
Independent, adjustable ac and dc parameters:
鈥?Switchhook detector threshold
鈥?Loop current limit
鈥?dc feed resistance
鈥?Termination impedance
Integrated ringing access relay
Integrated test-in relay
Integrated relay driver
Integrated ring trip detector
Thermal protection
44-pin, surface-mount, plastic package (PLCC)
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