LE75282BBVC datasheet, PDF - EEWORLD Datasheet

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LE75282BBVC: Descriptionline card lcas 2ch dual 44tqfp; CategoryWireless rf/communication Telecom circuit; File Size385KB，20 Pages; ManufacturerMicrosemi; Websitehttps://www.microsemi.com; Environmental Compliance

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LE75282BBVC Overview

line card lcas 2ch dual 44tqfp

LE75282BBVC Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Microsemi
Parts packaging code	QFP
package instruction	TQFP,
Contacts	44
Reach Compliance Code	compli
JESD-30 code	S-PQFP-G44
JESD-609 code	e3
length	10 mm
Number of functions	1
Number of terminals	44
Maximum operating temperature	85 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	TQFP
Package shape	SQUARE
Package form	FLATPACK, THIN PROFILE
Certification status	Not Qualified
Maximum seat height	1.2 mm
Nominal supply voltage	5 V
surface mount	YES
Telecom integrated circuit types	TELECOM CIRCUIT
Temperature level	OTHER
Terminal surface	MATTE TIN
Terminal form	GULL WING
Terminal pitch	0.8 mm
Terminal location	QUAD
width	10 mm

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™

Le75282

Dual Intelligent Line Card Access Switch

VE750 Series

APPLICATIONS

Central office

DLC

PBX

DAML

HFC/FITL

DESCRIPTION

The Le75282 Dual Intelligent Line Card Access Switch (LCAS)

device is a monolithic solid-state device that provides the

switching functionality of

four

2 Form C relays in one

economical small package.

The Le75282 Dual LCAS device is designed to provide power

ringing access to a telephone loop in central office, digital loop

carrier, private branch exchange, digitally added main line, and

hybrid fiber coax/fiber-in-the-loop analog line card applications.

An additional pair of solid-state contacts provides access to the

telephone loop for line test access or message waiting in the

PBX application.

FEATURES

Small size/surface-mount packaging

Monolithic IC reliability

Low impulse noise

Make-before-break, break-before-make operation

Clean, bounce-free switching

Low, matched ON-resistance

Built-in current limiting, thermal shutdown, and SLIC

device protection

5-V operation, very low power consumption

Battery monitor, All Off state upon loss of battery

No EMI

Latched logic level inputs, no drive circuitry

Only one external protector required per channel

BLOCK DIAGRAM

RELATED LITERATURE

081065 Le79228 Quad ISLAC™ Device Data Sheet

081190 Le792288 Octal ISLAC™ Device Data Sheet

081143 Le79232 Dual ISLIC™ Device Data Sheet

081144 Le79252 Dual ISLIC™ Device Data Sheet

080923 Le792x2/Le79228 Chip Set User’s Guide

ASLIC1

ALINE1

SW1

FGND1

VBH

Battery

Monitor

BSLIC1

BLINE1

SW3

SW5

SW6

SW4

SW2

ORDERING INFORMATION

Device

Le75282BBVC

Package Type

44-pin TQFP (Green)

Tray

Packing

ARINGING1

ATEST1

VDD

BRINGING1

BTEST1

LD1

Control

Logic

TSD1

OFF1

P1'-P3'

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

European Council to minimize the environmental impact of

electrical equipment.

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

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

DGND

CFG

CHANNEL 1

CHANNEL 2

Document ID#

081123

Date:

Rev:

Version:

Distribution:

Public Document

Sep 19, 2007

Le75282

TABLE OF CONTENTS

Data Sheet

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

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

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

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

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

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

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

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

Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Absolute Maximum Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Environmental Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Electrical Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Zero Cross Current Turn Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Switching Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Loss of Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Impulse Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Integrated SLIC Device Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Diode Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Temperature Shutdown Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

External Secondary Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Test Access Switch Protection Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Physical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

44-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Revision A1 to B1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Revision B1 to C1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Revision C1 to D1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Revision D1 to E1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Revision E1 to E2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Zarlink Semiconductor Inc.

Le75282

PRODUCT DESCRIPTION

The Le75282 Dual LCAS device has six operating states:

•

Idle/Talk

—

Line break switches closed, ringing and test access switches open.

Ringing

—

Ringing access switches closed, line break and test access switches open.

Test

—

Test access switches closed, line break and ringing access switches open.

Test/Monitor

—

Test access and line break switches closed, ringing access switches open.

Test Ringing

—

Test and ringing access switches closed, line break switches open.

All Off

—

Line break and ringing and test access switches open.

Data Sheet

Control is provided by an Intelligent Subscriber Line Audio-processing Circuit (ISLAC), such as the Le79228 codec, or any

microcontroller. See

Applications,

on page 14

for proper connection of the control bus (P-bus).

The Le75282 Dual LCAS device offers break-before-make or make-before-break switching, with simple logic level input control.

Because of the solid-state construction, voltage transients generated when switching into an inductive ringing load during ring

cadence or ring trip are minimized, possibly eliminating the need for external zero cross switching circuitry. State control is via

logic level inputs so no additional driver circuitry is required.

The line break switch is a linear switch that has exceptionally low ON-resistance and an excellent ON-resistance matching

characteristic. The ringing access switch has a breakdown voltage rating > 320 V which is sufficiently high, with proper protection,

to prevent breakdown in the presence of a transient fault condition (i.e., passing the transient on to the ringing generator).

Incorporated into the Le75282 Dual LCAS device is a diode bridge, current-limiting circuitry, and a thermal shutdown mechanism

to provide protection to the SLIC device and subsequent circuitry during fault conditions. Positive faults are directed to ground

and negative faults to battery. In either polarity, faults are reduced by the built-in current-limit and/or thermal shutdown

mechanisms.

To protect the Le75282 Dual LCAS device from an overvoltage fault condition, use of a secondary protector is required. The

secondary protector must limit the voltage seen at the A (Tip)/B (Ring) terminals to prevent the breakdown voltage of the switches

from being exceeded. To minimize stress on the solid-state contacts, use of a foldback- or crowbar- type secondary protector is

recommended. With proper choice of secondary protection, a line card using the Le75282 device will meet all relevant ITU-T,

LSSGR, FCC, or UL protection requirements.

The Le75282 Dual LCAS device provides extremely low idle and active power dissipation and allows use with virtually any range

of battery voltage. This makes the Le75282 Dual LCAS device especially appropriate for remote power applications such as

DAML or FOC/FITL or other Bellcore TA 909 applications where power dissipation is particularly critical.

Battery voltage is monitored by the control circuitry and used as a reference for the integrated protection circuit. The Le75282

device will enter an All Off state upon loss of battery.

During ringing, to turn on and maintain the ON state, the ringing access switch will draw a nominal 2 mA from the ring generator.

The Le75282 Dual LCAS device is packaged in a 44-pin TQFP package.

Zarlink Semiconductor Inc.

LE75282BBVC Related Products

	LE75282BBVC	LE75282BBVCT
Description	line card lcas 2ch dual 44tqfp	line card lcas 2ch dual 44tqfp
Is it Rohs certified?	conform to	conform to
Maker	Microsemi	Microsemi
Parts packaging code	QFP	QFP
package instruction	TQFP,	TQFP,
Contacts	44	44
Reach Compliance Code	compli	compli
JESD-30 code	S-PQFP-G44	S-PQFP-G44
JESD-609 code	e3	e3
length	10 mm	10 mm
Number of functions	1	1
Number of terminals	44	44
Maximum operating temperature	85 °C	85 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TQFP	TQFP
Package shape	SQUARE	SQUARE
Package form	FLATPACK, THIN PROFILE	FLATPACK, THIN PROFILE
Certification status	Not Qualified	Not Qualified
Maximum seat height	1.2 mm	1.2 mm
Nominal supply voltage	5 V	5 V
surface mount	YES	YES
Telecom integrated circuit types	TELECOM CIRCUIT	TELECOM CIRCUIT
Temperature level	OTHER	OTHER
Terminal surface	MATTE TIN	MATTE TIN
Terminal form	GULL WING	GULL WING
Terminal pitch	0.8 mm	0.8 mm
Terminal location	QUAD	QUAD
width	10 mm	10 mm

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