le79r70 Zarlink Semiconductor, le79r70 Datasheet

le79r70

Manufacturer Part Number

le79r70

Description

Ringing Subscriber Line Interface Circuit

Manufacturer

Zarlink Semiconductor

Datasheet

1.LE79R70.pdf (22 pages)

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APPLICATIONS

FEATURES

RELATED LITERATURE

NOTE: On August 3, 2007, Zarlink Semiconductor acquired the products and

technology of Legerity Holdings.

Integrated Access Devices (IADs)

Network Interface Units (NIUs)

Cable Modems

DSL Modems

Set Top / House Side Boxes

Intelligent PBX

Pain 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

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

Current gain = 1000

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)

080917 VE790 Series RSLIC Device Product Brief

080158 Le79R70/79/100/101 Ringing SLIC Devices

Technical Overview

080255 Le71HE0040J Evaluation Board User’s Guide

080753 Le58QL02/021/031 QLSLAC™ Data Sheet

Voice Solution

Ringing Subscriber Line Interface Circuit

ORDERING INFORMATION

DESCRIPTION

The Le79R70 Ringing Subscriber Line Interface Circuit

(RSLIC) device is a bipolar monolithic SLIC that offers on-chip

ringing. Designers can achieve significant cost reductions at

the system level for short-loop applications by integrating the

ringing function on chip. Examples of such applications would

be ISDN Terminal Adaptors and set top boxes. Using a CMOS-

compatible input waveform and wave shaping R-C network,

the Le79R70 Ringing SLIC device can provide trapezoidal

wave ringing to meet various design requirements.

See the

Le79R70DJC

Le79R70-1DJC

Le79R70-1FQC

Legerity reserves the right to fulfill all orders for this device with

parts marked with the "Am" part number prefix until all inventory

bearing this mark has been depleted. Note that parts marked with

either the "Am" or the "Le" part number prefix are equivalent

devices in terms of form, fit, and function—the prefix appearing on

the topside mark is the only difference.

The green package meets RoHS Directive 2002/95/EC of the

European Council to minimize the environmental impact of

electrical equipment.

Due to size constraints, QFN devices are marked by omitting the

“Le” prefix and the performance grade dash character. For

example, Le79R70-1QC is marked 79R701QC.

For delivery using a tape and reel packing system, add a "T" suffix

to the OPN (Ordering Part Number) when placing an order.

Device

Le79R70 Block Diagram, on page

32-pin PLCC, No Pol. Rev.

(Green package)

32-pin PLCC, Pol. Rev.

(Green package)

32-pin QFN, Pol. Rev.

(Green package)

Document ID#: 080211 Date:

Rev:

Distribution:

Package Type

Public Document

2, 3

Le79R70

VE580 Series

Version: 2

Tube

Tray

Packing

Sep 19, 2007

™

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