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L7557 - Low-Power SLICs

Download the L7557 datasheet PDF (L7556 included). The manufacturer datasheet provides complete specifications, pinout details, electrical characteristics, and typical applications for low-power slics.

Description

These electronic subscriber loop interface circuits (SLICs) are optimized for low power consumption while providing an extensive set of

Features

  • s Auxiliary input for second battery, and internal switch to enable its use to save power s Low active power (typical 125 mW during on-hook transmission) s Supports meter pulse injection s Spare op amp for meter pulse filtering s.
  • 16 V to.
  • 60 V power supply operation s Distortion-free on-hook transmission s Convenient operating states:.
  • Forward powerup.
  • Disconnect (high impedance).
  • 2-wire wink (zero loop voltage) s Adjustable supervision functions:.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (L7556-LucentTechnologies.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number L7557
Manufacturer Lucent Technologies
File Size 487.35 KB
Description Low-Power SLICs
Datasheet download datasheet L7557 Datasheet

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Other Datasheets by Lucent Technologies
  • L7554 - Low-Power SLIC
  • L7556 - Low-Power SLICs
  • L7581 - Ringing Access Switch
  • L7582 - Tip Ring Access Switch
  • L7583A - Line Card Access Switch
  • L7583B - Line Card Access Switch
  • L7583C - Line Card Access Switch
  • L7583D - Line Card Access Switch

Full PDF Text Transcription

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Data Sheet January 2000 L7556, L7557 Low-Power SLICs with Battery Switch Features s Auxiliary input for second battery, and internal switch to enable its use to save power s Low active power (typical 125 mW during on-hook transmission) s Supports meter pulse injection s Spare op amp for meter pulse filtering s –16 V to –60 V power supply operation s Distortion-free on-hook transmission s Convenient operating states: — Forward powerup — Disconnect (high impedance) — 2-wire wink (zero loop voltage) s Adjustable supervision functions: — Off-hook detector with longitudinal rejection — Ground key detector — Ring trip detector s Independent, adjustable, dc and ac parameters: — dc feed resistance — Loop current limit — Termination impedance s Thermal protection Description These electronic sub
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