LE75282BBVC

LE75282BBVC Datasheet

Le75282

Part	Datasheet
LE75282BBVC	LE75282BBVC (pdf)

Related Parts	Information
LE75282BBVCT	LE75282BBVCT

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Le75282 Dual Intelligent Line Card Access Switch VE750 Series - Central office - DLC - PBX - DAML - HFC/FITL - 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 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. 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 FGND1 Battery Monitor ASLIC1 ALINE1 ORDERING INFORMATION Device Le75282BBVC Package Type1 44-pin TQFP Green Packing2 Tray 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. ARINGING1 ATEST1 SW3 SW5 VDD DGND CFG CHANNEL 1 CHANNEL 2 BSLIC1 BLINE1 BRINGING1 BTEST1 Control Logic LD1 TSD1 OFF1 P1'-P3' Document ID# 081123 Date Sep 19, 2007 Version 2 Distribution Public Document Le75282 Data Sheet TABLE OF CONTENTS Applications Features Related literature Ordering Information Description. Block Diagram Product Description Connection Diagram Pin Descriptions Absolute Maximum Rating Operating Ranges Zarlink Semiconductor Inc. Le75282 Data Sheet PRODUCT DESCRIPTION The Le75282 Dual LCAS device has six operating states: • Idle/Talk Line break switches closed, ringing and test access switches open. • Ringing access switches closed, line break and test access switches open. • 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. 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. CONNECTION DIAGRAM Le75282 Data Sheet BLINE2 NC ALINE2 ATEST2 ARINGING2 ARINGING1 ATEST1 ALINE1 NC BLINE1 BTEST2 NC BRINGING2 NC TSD2 FGND2 VBH VDD NC DGND 44 43 42 41 40 39 38 37 36 35 34 44-pin TQFP 12 13 14 15 16 17 18 19 20 21 22 BTEST1 NC BRINGING1 NC TSD1 FGND1 VBH VDD CFG DGND BSLIC2 ASLIC2 P2' P3' LD1 LD2 OFF1 OFF2 ASLIC1 BSLIC1 Pin Descriptions CH1 CH2 Pin Name 7 FGNDx Fault ground. 21 13 36 42 • Added green package OPN to Ordering Information, on page 1 • In Product Description, on page 3, changed breakdown voltage rating from > 480 V to > 320 V. • In Electrical Characteristics, changed all ON-resistance and current limit typical values to reflect actual values. • Added Package Assembly, on page 5 • Removed Le75282BVC package option in Ordering Information, on page • Added notes to table in Ordering Information, on page • Diode Bridge, Electrical Specifications table moved to page • Test Switch Protection Considerations section added to page • Table 1, test condition wording for Dynamic Current Limit modified. • Table 3, test conditions for Surge Current added. • Test Switch Protection Considerations section modified. • Minor text edits. • Enhanced format of package drawings in Physical Dimensions, on page 18 • Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007 Zarlink Semiconductor Inc. For more information about all Zarlink products visit our Web Site at Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries collectively “Zarlink” is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and unless agreed by Zarlink in writing may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request. Purchase of Zarlink’s I2C components conveys a license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are trademarks of Zarlink Semiconductor Inc. TECHNICAL DOCUMENTATION - NOT FOR RESALE

PDF Datasheet Preview

Le75282

Dual Intelligent Line Card Access Switch VE750 Series
- Central office - DLC - PBX - DAML - HFC/FITL
- 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

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.

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

FGND1

Battery Monitor

ASLIC1

ALINE1
ORDERING INFORMATION

Device Le75282BBVC

Package Type1 44-pin TQFP Green

Packing2 Tray

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.

ARINGING1 ATEST1

SW3 SW5

VDD DGND

CFG CHANNEL 1

CHANNEL 2

BSLIC1

BLINE1

BRINGING1

BTEST1

Control Logic

LD1 TSD1 OFF1 P1'-P3'

Document ID# 081123 Date Sep 19, 2007

Version 2

Distribution Public Document

Le75282

Data Sheet

TABLE OF CONTENTS
Applications Features Related literature Ordering Information Description. Block Diagram Product Description Connection Diagram

Pin Descriptions Absolute Maximum Rating Operating Ranges

Zarlink Semiconductor Inc.

Le75282

Data Sheet

PRODUCT DESCRIPTION

The Le75282 Dual LCAS device has six operating states:
• Idle/Talk Line break switches closed, ringing and test access switches open.
• Ringing access switches closed, line break and test access switches open.
• 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.

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.

CONNECTION DIAGRAM

Le75282

Data Sheet

BLINE2 NC ALINE2 ATEST2

ARINGING2

ARINGING1

ATEST1 ALINE1 NC BLINE1

BTEST2 NC

BRINGING2 NC

TSD2 FGND2

VBH VDD

NC DGND
44 43 42 41 40 39 38 37 36 35 34
44-pin TQFP
12 13 14 15 16 17 18 19 20 21 22

BTEST1 NC BRINGING1 NC TSD1 FGND1 VBH VDD CFG DGND

BSLIC2 ASLIC2

P2' P3' LD1 LD2 OFF1 OFF2 ASLIC1 BSLIC1

Pin Descriptions

CH1 CH2 Pin Name
7 FGNDx

Fault ground.
21 13 36 42
• Added green package OPN to Ordering Information, on page 1
• In Product Description, on page 3, changed breakdown voltage rating from > 480 V to > 320 V.
• In Electrical Characteristics, changed all ON-resistance and current limit typical values to reflect actual values.
• Added Package Assembly, on page 5
• Removed Le75282BVC package option in Ordering Information, on page
• Added notes to table in Ordering Information, on page
• Diode Bridge, Electrical Specifications table moved to page
• Test Switch Protection Considerations section added to page
• Table 1, test condition wording for Dynamic Current Limit modified.
• Table 3, test conditions for Surge Current added.
• Test Switch Protection Considerations section modified.
• Minor text edits.
• Enhanced format of package drawings in Physical Dimensions, on page 18
• Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007

Zarlink Semiconductor Inc.

For more information about all Zarlink products visit our Web Site at

Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries collectively “Zarlink” is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink.

This publication is issued to provide information only and unless agreed by Zarlink in writing may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request.

Purchase of Zarlink’s I2C components conveys a license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are trademarks of Zarlink Semiconductor Inc.

TECHNICAL DOCUMENTATION - NOT FOR RESALE

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LE75282BBVC Datasheet file may be downloaded here without warranties.

Datasheet ID: LE75282BBVC 648980