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LE79252

Dual Intelligent SLIC

Status: In Production

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Development Environment
RoHS Information
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Device Overview

Summary

The Le79252 Dual Intelligent Subscriber Line Interface Circuit (ISLIC) device, in combination with an Le79228x ISLAC device, implements the telephone line interface function. This enables the design of a low cost, high performance, fully software programmable line interface for multiple country applications worldwide. All AC, DC, and signaling parameters are fully programmable via microprocessor or GCI interfaces on the Le79228x ISLAC devices. Additionally, the Le79252 device has integrated self-test and line-test capabilities to resolve faults to the line or line circuit. The integrated test capability is crucial for remote applications where dedicated test hardware is not cost effective. When combined with Microchip's Le79114 VCP II device, an optimized chip set with additional performance features can be realized.

Additional Features
  • Monitor of two-wire interface voltages and currents supports
    • Voice transmission
    • Internal ringing generation
    • Programmable DC feed characteristics
    • Selectable off-hook and ground-key thresholds
    • Subscriber line diagnostics
    • Foreign voltage sensing
    • Power cross and fault detection
  • Supports 85 Vrms internal ringing
  • 3.3 V and battery supplies
  • Dual battery operation for system power saving
    • Automatic battery switching
    • Intelligent thermal management
  • Compatible with inexpensive protection networks
    • Accommodates low tolerance fuse resistors or PTC thermistors
  • Metering capable
    • 12 kHz and 16 kHz
    • Smooth polarity reversal
  • Tip-open state supports ground start signaling
  • Integrated test load switch/relay drivers
  • 5 REN with DC offset
Parametrics
Name
Value
Application
Access Network SLIC
Series
VE790
Loop Length
Long
Battery Topology
External
Output Voltage (V) max
150
Number of Ports
2

Documents

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Data Sheets

  
252KB

Please visit the Microsemi Software Download System (SDS) for available software.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
LE79252BTC
0.289900
1.850000
44
TQFP
10x10x1mm
Matte Tin
e3
LE79252BTCT
0.289900
1.080000
44
TQFP
10x10x1mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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