LE79R70JC datasheet, PDF - EEWORLD Datasheet

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LE79R70JC: DescriptionSLIC, 2-4 Conversion, Bipolar, PQCC32,; CategoryWireless rf/communication Telecom circuit; File Size611KB，23 Pages; ManufacturerMicrosemi; Websitehttps://www.microsemi.com

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LE79R70JC Overview

SLIC, 2-4 Conversion, Bipolar, PQCC32,

LE79R70JC Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Microsemi
Reach Compliance Code	unknown
battery fed	CONSTANT CURRENT
Battery powered	-19 TO -67 V
mix	2-4 CONVERSION
JESD-30 code	R-PQCC-J32
maximum noise	14 dBrnC
Number of terminals	32
Maximum operating temperature	70 °C
Minimum operating temperature
PSRR-Min	30 dB
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Encapsulate equivalent code	LDCC32,.5X.6
Package shape	RECTANGULAR
Package form	CHIP CARRIER
power supply	5 V
Certification status	Not Qualified
Maximum slew rate	9 mA
Nominal supply voltage	5 V
surface mount	YES
technology	BIPOLAR
Telecom integrated circuit types	SLIC
Temperature level	COMMERCIAL
Terminal form	J BEND
Terminal pitch	1.27 mm
Terminal location	QUAD

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™

Le79R70

Ringing Subscriber Line Interface Circuit

VE580 Series

APPLICATIONS

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

ORDERING INFORMATION

Device

Le79R70JC

Le79R70DJC

Le79R70-1JC

Le79R70-1DJC

Le79R70QC

Le79R70-1QC

Le79R70-1FQC

Package Type

2, 3

32-pin PLCC, No Pol. Rev.

(Green package)

32-pin PLCC, Pol. Rev.

(Green package)

32-pin QFN, No Pol. Rev.

32-pin QFN, Pol. Rev.

(Green package)

Packing

Tube

Tray

FEATURES

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)

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

parts marked with the "Am" part number prefix, until such time as

all inventory bearing this mark has been depleted. It should be

noted that parts marked with either the "Am" or the "Le" part

number prefix are equivalent devices in terms of form, fit, and

function. The only difference between the two is in the part

number prefix appearing on the topside mark.

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.

Not available for new customers.

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

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

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

Le79R70 Block Diagram,

on page 3.

RELATED LITERATURE

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

Document ID#:

080211

Date:

Dec 6, 2005

Rev:

Version:

Distribution:

Public Document

TABLE OF CONTENTS

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Related literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Environmental Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Relay Driver Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

DC Feed Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Ring-Trip Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Test Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Physical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

32-Pin PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

32-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision A to B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision B to C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision C to D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision D to E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision E to F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision F to G1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision G1 to H1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Revision H1 to I1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Le79R70 VE580 Series Data Sheet

PRODUCT DESCRIPTION

The Legerity family of subscriber line interface circuit (SLIC) products provide the telephone interface functions required

throughout the worldwide market. Legerity SLIC devices address all major telephony markets including central office (CO),

private branch exchange (PBX), digital loop carrier (DLC), fiber-in-the-loop (FITL), radio-in-the-loop (RITL), hybrid fiber coax

(HFC), and video telephony applications.

The Legerity SLIC devices offer support of BORSHT (battery feed, over voltage protection, ringing, supervision, hybrid, and test)

functions with features including current limiting, on-hook transmission, polarity reversal, tip-open, and loop-current detection.

These features allow reduction of line card cost by minimizing component count, conserving board space, and supporting

automated manufacturing.

The Legerity SLIC devices provide the two- to four-wire hybrid function, DC loop feed, and two-wire supervision. Two-wire

termination is programmed by a scaled impedance network. Transhybrid balance can be achieved with an external balance

circuit or simply programmed using a companion Legerity codec device, the Le79C02/03/031 DSLAC™ device, the Le79Q02/

021/031 Programmable Quad SLAC (QSLAC™) device, or the Le79Q5457/4457 Non-programmable QSLAC device.

The Le79R70 Ringing SLIC device is a bipolar monolithic SLIC that offers on-chip ringing. Now 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 can provide trapezoidal wave ringing to meet various design requirements.

In order to further enhance the suitability of this device in short-loop, distributed switching applications, Legerity has maximized

power savings by incorporating battery switching on chip. The Le79R70 Ringing SLIC device switches between two battery

supplies such that in the Off-hook (active) state, a low battery is used to save power. In order to meet the Open Circuit voltage

requirements of fax machines and maintenance termination units (MTU), the SLIC automatically switches to a higher voltage in

the On-hook (standby) state.

Like all of the Legerity SLIC devices, the Le79R70 Ringing SLIC device supports on-hook transmission, ring-trip detection and

programmable loop-detect threshold. The Le79R70 Ringing SLIC device is a programmable constant-current feed device with

two on-chip relay drivers to operate external relays. This unique device is available in the proven Legerity 75 V bipolar process.

Figure 1.

Le79R70 Block Diagram

Relay

Driver

RTRIP1

RTRIP2

A(TIP)

Ring-Trip

Detector

HPA

Two-Wire

Interface

HPB

Signal

Transmission

B(RING)

Power-Feed

Controller

Ground-Key

Detector

Off-Hook

Detector

Input Decoder

and Control

Relay

Driver

RYOUT2

RYE

RYOUT1

DET

VTX

RSN

RINGIN

RDC

RDCR

VBAT2

Switch

Driver

RSGL

RSGH

B2EN

VBAT1

VCC VNEG BGND AGND/DGND

Le79R70 VE580 Series Data Sheet

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