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L8575 Datasheet

Part Number L8575
Manufacturers Agere Systems
Logo Agere Systems
Description Low-Cost Subscriber Line Interface Circuit
Datasheet L8575 DatasheetL8575 Datasheet (PDF)

Advance Data Sheet March 1997 L8575 Dual-Resistive, Low-Cost Subscriber Line Interface Circuit (SLIC) Features s Two channels in a single package s Serial data interface s Per-channel powerdown s Low standby power (≤65 mW per channel) s Integrated protection s No external protection device required s Battery noise cancellation s Switchhook detector s Ring-trip detector s Switchhook and ring-trip detector self-test s Fault detector s Zero ring voltage cross detection s Three relay drivers per c.

  L8575   L8575






Part Number L8576B
Manufacturers Agere Systems
Logo Agere Systems
Description Dual Ringing SLIC
Datasheet L8575 DatasheetL8576B Datasheet (PDF)

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.

  L8575   L8575







Part Number L8574D
Manufacturers Agere Systems
Logo Agere Systems
Description Resistive SLIC / Ring Relay and Protector
Datasheet L8575 DatasheetL8574D Datasheet (PDF)

Data Sheet October 1998 L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring Relay, and Protector (SRP) for Long Loop and TR-57 Applications Features s Low-power scan mode for low on-hook power dissipation (55 mW max) s Low active power dissipation; talk or on-hook transmission (240 mW max) s Distortion-free on-hook transmission s Eight operating states via latched paralleled data inputs with channel select feature s Precision fixed 28 mA current limiter s Integrated protection s No .

  L8575   L8575







Low-Cost Subscriber Line Interface Circuit

Advance Data Sheet March 1997 L8575 Dual-Resistive, Low-Cost Subscriber Line Interface Circuit (SLIC) Features s Two channels in a single package s Serial data interface s Per-channel powerdown s Low standby power (≤65 mW per channel) s Integrated protection s No external protection device required s Battery noise cancellation s Switchhook detector s Ring-trip detector s Switchhook and ring-trip detector self-test s Fault detector s Zero ring voltage cross detection s Three relay drivers per channel s 44-pin, surface-mount, plastic package (PLCC) Description The L8575 is a dual-resistive, low-cost subscriber line interface circuit (SLIC) that is optimized to meet both ITU-T recommendations and LSSGR requirements for 600 Ω/900 Ω resistive and complex impedance termination applications. It interfaces the lowvoltage circuits on an analog line card to the Tip and Ring of two subscriber loops. The L8575 does not supply dc current to the subscriber loops—external resistors are use.


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