The Le79R70 is a bipolar monolithic SLIC device that support integrated (on-chip) ringing, pin-for-pin compatibility and flexibility for varying loop lengths. With the Ringing SLIC, you can achieve significant system-level cost reductions while designing innovative linecard solutions.

Features & Benefits

Ideal for ISDN-TA and set top applications

On-chip ringing with on-chip ring-trip detector

Low Standby state power

Battery operation:
     >     VBAT1: -40 V to -67 V
     >     VBAT2: -19 V to VBAT1

On-chip battery switching and feed selection

On-hook transmission

Polarity reversal option

Programmable constant-current feed

Programmable open circuit voltage

Programmable loop-detect threshold

Two-wire impedance set by single component

Ground-key detector

Tip Open state for ground-start lines

Internal VEE regulator (no external -5 V power supply required)

Two on-chip relay drivers and snubber circuits

Documentation

• Le79R70 Datasheet

Design Manuals

Software Manuals

Application Notes

• SLIC Device Applications Appnote
• SLIC Dial Pulse Performance Appnote
• SLIC Longitudinal Balance Appnote
• Telephone Line Card Power Considerations Appnote
• Overvoltage Protection Appnote
• Type 2 Calling Identity Appnote
• Am79R70/79/100/101 Ringing SLIC Device Technical Overview

Product Previews

• VE79R Product Preview
• VE580 Series Product Preview

Evaluation Boards

• Le71HE0040J Evaluation Board Users Guide

Reference Designs

• Le71HR0021 Reference Design Users Guide

Software URLs

• LE71SK0002: VoicePath API-II Software
• LE71SDKWIN: WinSLAC
• LE71SDKPRO: Profile Wizard
• LE71SDKVPS: VP-Script
• LE71SDKUVB: UVB Images

Typical Applications

Integrated Access Devices (IADs)

Network Interface Units (NIUs)

Cable Modems

Set Top / House Side Boxes

Intelligent PBX

Pair Gain

FXS Cards

Voice over ISDN or T1/E1

Smart Residential Gateways

WLL, APON, FITL, NGN, and all other short-loop CPE/ Enterprise telephony applications

Product Packaging & Availability

Part Number	Package Type	Pin Count	Lead-Free Option	Shipping Option(s)	Lead Time(wks)	Status
LE79R70DJC	PLCC	32	GREEN	Tube	10-12 weeks	Production
LE79R70DJC	PLCC	32	GREEN	Tube	10-12 weeks	Production
LE79R70DJCT	PLCC	32	GREEN	TR	10-12 weeks	Production
LE79R70DJCT	PLCC	32	GREEN	TR	10-12 weeks	Production

Packaging Information

• Soldering Profiles
• Moisture Sensitivity
• Shelf Life
• Reliability Data

Technical Support

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