LE75181ABSCT

LE75181ABSCT Datasheet

Le75181

Part	Datasheet
LE75181ABSCT	LE75181ABSCT (pdf)

Related Parts	Information
LE75181CBSC	LE75181CBSC
LE75181CBSCT	LE75181CBSCT
LE75181BBSC	LE75181BBSC
LE75181BBSCT	LE75181BBSCT
LE75181ABSC	LE75181ABSC

PDF Datasheet Preview
Le75181 Ringing 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 protection - 5 V only 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 - TTL logic control compatible - Default power up state RELATED LITERATURE - 081123 Le75282 Dual Intelligent Line Card Access Switch Data Sheet - 081126 Le75183 Line Card Access Switch Data Sheet - 080754 Le58QL061/063 QLSLAC Data Sheet - 080676 Le5711 Dual SLIC Data Sheet - 081047 Le5712 Dual SLIC Data Sheet The VoiceEdge family VE750 series of Line Card Access Switches LCAS is a family of monolithic solid-state switches that is designed to provide both power ringing access and test access on the analog line card. These devices, while not a pinfor-pin replacement for the traditional electromechanical relay EMR solution, provide the equivalent switching functionality. The VE750 series LCAS is meant as a solid-state alternative to the EMRs. The Le75181A/B device is pin-for-pin compatible with Zarlink’s L7581A/B device, and the Le75181C device is pinfor-pin compatible with Zarlink’s L8581A device. Zarlink also offers a range of compatible SLIC devices and codec/filters that can be used with the VE750 series LCAS for complete line card solutions that can be used worldwide in analog line card applications. BLOCK DIAGRAM Le75181A/C FGND SCR & Trip Circuit VBAT TBAT TLINE TRINGING Temperature Shutdown Le75181B RBAT RLINE RRINGING LATCH INPUT DGND FGND VBAT ORDERING INFORMATION Device LE75181ABSC LE75181BBSC LE75181CBSC Package Type1 16-Pin SOIC, GULL Green Packing2 Tube 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. TBAT TLINE TRINGING SW2 SW4 VDD TSD Temperature Shutdown RBAT RLINE RRINGING LATCH INPUT DGND Document ID# 081105 Date Sep 18, 2007 Version 2 Distribution Public Document Le75181 Data Sheet TABLE OF CONTENTS Applications Features Related literature Ordering Information Description. Block Diagram Product Description Connection Diagrams Pin Descriptions Absolute Maximum Ratings Operating Ranges Zarlink Semiconductor Inc. Le75181 Data Sheet PRODUCT DESCRIPTION The Le75181 Ringing Access Switch is a monolithic solid-state device that provides the switching functionality of a two-form C switch. The Le75181 is designed to provide power ringing access to tip and ring 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. The Le75181 has three states the idle talk state line break switches closed, ringing access switches open , power ringing state line break switches open, ringing access switches closed , and all OFF state. The Le75181 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 >480 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 Le75181A and Le75181C is a diode bridge/SCR clamping circuit, current-limiting circuitry, and a thermal shutdown mechanism to provide protection to the SLIC device and subsequent circuitry during fault conditions see block diagram . Positive and negative lightning is reduced by the current-limiting circuitry and steered to ground via diodes and the integrated SCR. Power cross is also reduced by the current-limiting and thermal shutdown circuits. The Le75181B version provides only an integrated diode bridge along with current limiting and thermal shutdown, as shown in the block diagram. This will cause positive faults to be directed to ground and negative faults to battery. In either polarity, faults are reduced by the current-limit and/or thermal shutdown mechanisms. The default power up state is in Idle/Talk state unless otherwise being overwritten by external controls. To protect the Le75181 from an overvoltage fault condition, use of a secondary protector is required. The secondary protector must limit the voltage seen at the tip/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 Le75181 will meet all relevant ITU-T, LSSGR, FCC, or UL* protection requirements. The Le75181 operates off of a 5-V supply only. This gives the device extremely low idle and active power dissipation and allows use with virtually any range of battery voltage. This makes the Le75181 especially appropriate for remote power applications such as DAML or FOC/FITL or other Bellcore TA 909 applications where power dissipation is particularly critical. A battery voltage is also used by the Le75181, only as a reference for the integrated protection circuit. The Le75181 will enter an all OFF state upon loss of battery. During power ringing, to turn on and maintain the ON state, the ring access switch will draw a nominal 2 mA from the ring generator. The Le75181ASC/BSC/CSC device is packaged in a 16-pin, plastic SOIC GULL package. Zarlink Semiconductor Inc. CONNECTION DIAGRAMS Le75181 Figure 16-Pin SOIC FGND 1 TBAT 2 TLINE 3 NC 4 NC 5 TRINGING 6 VDD 7 TSD 8 16-Pin SOIC 16 VBAT 15 RBAT 14 RLINE 13 NC 12 RRINGING 11 LATCH 10 INPUT 9 DGND Data Sheet Pin Descriptions Pin Name DGND FGND INPUT LATCH NC RBAT RLINE RRINGING TBAT TLINE TRINGING VBAT VDD Type Ground Input Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output Input Power Description Digital ground. Fault ground. Logic level input switch control. Internally 75 typical pull down. Data latch control, active-high, transparent low. Internally 75 typical pull down. No connection. Connect to RING on SLIC side. Connect to RING on line side. Connect to ringing generator. Connect to TIP on SLIC side. Connect to TIP on line side. Connect to return ground for ringing generator. Temperature shutdown pin. Can be used as a logic level input or output. See table 8, truth table, on page 15, and the Switching Behavior section of this data sheet for input pin description. As an output, will read HIGH when device is in its operational mode and LOW in the thermal shutdown mode. In the Le75181, the thermal shutdown mechanism cannot be disabled. Battery voltage. Used as a reference for protection circuit. 5-V supply. Zarlink Semiconductor Inc. • Added green package OPNs to Ordering Information, on page 1 • Added Package Assembly, on page 5 • Removed non-green OPNs from Ordering Information, on page 1 • Added notes to Ordering Information, on page 1 • Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007 Data Sheet 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

Le75181

Ringing 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
protection - 5 V only 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 - TTL logic control compatible - Default power up state

RELATED LITERATURE
- 081123 Le75282 Dual Intelligent Line Card Access Switch Data Sheet
- 081126 Le75183 Line Card Access Switch Data Sheet - 080754 Le58QL061/063 QLSLAC Data Sheet - 080676 Le5711 Dual SLIC Data Sheet - 081047 Le5712 Dual SLIC Data Sheet

The VoiceEdge family VE750 series of Line Card Access Switches LCAS is a family of monolithic solid-state switches that is designed to provide both power ringing access and test access on the analog line card. These devices, while not a pinfor-pin replacement for the traditional electromechanical relay EMR solution, provide the equivalent switching functionality. The VE750 series LCAS is meant as a solid-state alternative to the EMRs.

The Le75181A/B device is pin-for-pin compatible with Zarlink’s L7581A/B device, and the Le75181C device is pinfor-pin compatible with Zarlink’s L8581A device.

Zarlink also offers a range of compatible SLIC devices and codec/filters that can be used with the VE750 series LCAS for complete line card solutions that can be used worldwide in analog line card applications.

BLOCK DIAGRAM

Le75181A/C

FGND

SCR & Trip Circuit

VBAT

TBAT TLINE TRINGING

Temperature Shutdown

Le75181B

RBAT

RLINE

RRINGING

LATCH

INPUT

DGND

FGND

VBAT
ORDERING INFORMATION

Device LE75181ABSC LE75181BBSC LE75181CBSC

Package Type1 16-Pin SOIC, GULL Green

Packing2 Tube

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.

TBAT TLINE

TRINGING

SW2 SW4

VDD TSD

Temperature Shutdown

RBAT RLINE

RRINGING LATCH INPUT DGND

Document ID# 081105 Date Sep 18, 2007

Version 2

Distribution Public Document

Le75181

Data Sheet

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

Pin Descriptions Absolute Maximum Ratings Operating Ranges

Zarlink Semiconductor Inc.

Le75181

Data Sheet

PRODUCT DESCRIPTION

The Le75181 Ringing Access Switch is a monolithic solid-state device that provides the switching functionality of a two-form C switch.

The Le75181 is designed to provide power ringing access to tip and ring 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. The Le75181 has three states the idle talk state line break switches closed, ringing access switches open , power ringing state line break switches open, ringing access switches closed , and all OFF state.

The Le75181 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 >480 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 Le75181A and Le75181C is a diode bridge/SCR clamping circuit, current-limiting circuitry, and a thermal shutdown mechanism to provide protection to the SLIC device and subsequent circuitry during fault conditions see block diagram . Positive and negative lightning is reduced by the current-limiting circuitry and steered to ground via diodes and the integrated SCR. Power cross is also reduced by the current-limiting and thermal shutdown circuits.

The Le75181B version provides only an integrated diode bridge along with current limiting and thermal shutdown, as shown in the block diagram. This will cause positive faults to be directed to ground and negative faults to battery. In either polarity, faults are reduced by the current-limit and/or thermal shutdown mechanisms.

The default power up state is in Idle/Talk state unless otherwise being overwritten by external controls.

To protect the Le75181 from an overvoltage fault condition, use of a secondary protector is required. The secondary protector must limit the voltage seen at the tip/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 Le75181 will meet all relevant ITU-T, LSSGR, FCC, or UL* protection requirements.

The Le75181 operates off of a 5-V supply only. This gives the device extremely low idle and active power dissipation and allows use with virtually any range of battery voltage. This makes the Le75181 especially appropriate for remote power applications such as DAML or FOC/FITL or other Bellcore TA 909 applications where power dissipation is particularly critical.

A battery voltage is also used by the Le75181, only as a reference for the integrated protection circuit. The Le75181 will enter an all OFF state upon loss of battery.

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

The Le75181ASC/BSC/CSC device is packaged in a 16-pin, plastic SOIC GULL package.

Zarlink Semiconductor Inc.

CONNECTION DIAGRAMS

Le75181

Figure 16-Pin SOIC

FGND 1 TBAT 2 TLINE 3

NC 4 NC 5 TRINGING 6 VDD 7 TSD 8
16-Pin SOIC
16 VBAT 15 RBAT 14 RLINE 13 NC 12 RRINGING 11 LATCH 10 INPUT 9 DGND

Data Sheet

Pin Descriptions

Pin Name DGND FGND INPUT LATCH NC RBAT RLINE

RRINGING TBAT TLINE

TRINGING

VBAT VDD

Type Ground

Input

Input/Output Input/Output Input/Output Input/Output Input/Output Input/Output

Input/Output

Input Power

Description Digital ground. Fault ground.

Logic level input switch control. Internally 75 typical pull down. Data latch control, active-high, transparent low. Internally 75 typical pull down.

No connection. Connect to RING on SLIC side. Connect to RING on line side. Connect to ringing generator. Connect to TIP on SLIC side. Connect to TIP on line side. Connect to return ground for ringing generator. Temperature shutdown pin. Can be used as a logic level input or output. See table 8, truth table, on page 15, and the Switching Behavior section of this data sheet for input pin description. As an output, will read HIGH when device is in its operational mode and LOW in the thermal shutdown mode. In the Le75181, the thermal shutdown mechanism cannot be disabled. Battery voltage. Used as a reference for protection circuit. 5-V supply.

Zarlink Semiconductor Inc.
• Added green package OPNs to Ordering Information, on page 1
• Added Package Assembly, on page 5
• Removed non-green OPNs from Ordering Information, on page 1
• Added notes to Ordering Information, on page 1
• Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007

Data Sheet

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 LE75181ABSCT Datasheet file may be downloaded here without warranties.

Datasheet ID: LE75181ABSCT 648977