The Le79R70-1 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

Space-saving package options (8x8 QFN)

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
• LE71SDKVPS: VP-Script
• LE71SDKUVB: UVB Images
• LE71SDKPRO: Profile Wizard

Specific Applications

• ZLAN-286 Power Consumption and Dissipation Calculation of Clockcenter Devices
• ZLAN-296 Applications of the ZL30320 Linux Software Porting Guide
• ZLAN-287 Applications of the ZL303xx Hybrid Clock
• ZLAN-261 Applications of the ZL303xx Bring-up Scripts
• ZLAN-230 Universal Clock Translators/Generators Application Note
• ZLAN-269 - Universal Clock Translators/Generators Power Supply Decoupling and Layout Practices
• ZLAN-68 - List of Oscillators & Crystals that can be used with Zarlink's PLL, Digital Switches with Embedded PLL & Timing over Packet Devices
• ZLAN-294 Understanding New Char Driver with FPE
• ZLAN-290 - Zarlink Analog Switches Suit a Wide Variety of Applications
• ZLAN-68 TOP - List of Oscillators that can be used with Zarlink's ToP Devices
• ZLAN-267 Generating Common Frequencies with Universal Clock Translators and Universal Clock Generators
• ZLAN-271 - MT8816 Evaluation Board ZLE8816 User's Manual
• ZLAN-252 - Perform IEEE 1588v2 PTP Testing Using the ZLE30320 Kit
• ZLAN-251 - Applications of the ZL303xx - Debug Steps
• ZLAN-253 - ZLS38500/01/02 Filter Preloading
• VCP2-Type2CallerID-AppNote_Nov11.pdf
• Switching Regulator Power Supply Design Appnote
• VE880 Series Trapezoidal Ringing Appnote
• VoicePort Devices Ground Start Procedure Appnote
• ZLAN-306-Applications of ZLS3034x and ZLS30390 Application Note
• ZLAN-300-Linux Software Porting Guide Application Note
• ZLAN-265 Tracking ToD Information using the ZL30142/43
• ZLAN-212-Low_Jitter_Synchronizer_Power_Supply_Decoupling_and_Layout_Practices- Dec10.pdf
• ZLAN-301 - ClockCenter Custom OTP Configuration Service
• ZLAN-254 - Generating 156.25 MHz LVPECL and 25 MHz CMOS clocks with ZL3013X/14X/34X devices

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

White Papers

• Achieving Ultra-Low Power RF in Short-Range Apps

Product Packaging & Availability

Part Number	Package Type	Pin Count	Lead-Free Option	Shipping Option(s)	Lead Time(wks)	Status
LE79R70-1DJC	PLCC	32	GREEN	Tube	10-12 weeks	Production
LE79R70-1DJC	PLCC	32	GREEN	Tube	10-12 weeks	Production
LE79R70-1DJCT	PLCC	32	GREEN	TR	10-12 weeks	Production
LE79R70-1DJCT	PLCC	32	GREEN	TR	10-12 weeks	Production
LE79R70-1FQC	QFN	32	GREEN	Tray	10-12 weeks	Production
LE79R70-1FQC	QFN	32	GREEN	Tray	10-12 weeks	Production
LE79R70-1FQCT	QFN	32	GREEN	TR	10-12 weeks	Production
LE79R70-1FQCT	QFN	32	GREEN	TR	10-12 weeks	Production

Packaging Information

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

Technical Support

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