LE75183BFSCT datasheet, PDF - EEWORLD Datasheet

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LE75183BFSCT: Descriptionline card lcas 1chiple 28soic; Categorysemiconductor Analog mixed-signal IC; File Size283KB，30 Pages; ManufacturerMicrosemi; Websitehttps://www.microsemi.com; Environmental Compliance

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line card lcas 1chiple 28soic

LE75183BFSCT Parametric

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Datasheets
LE75183
Standard Package	1,000
Category	Integrated Circuits (ICs)
Family	Interface - Telecom

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™

Le75183

Line Card Access Switch

VE750 Series

Data Sheet

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 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

Device

Le75183ADSC

Le75183BDSC

Le75183CDSC

Le75183AFQC

Le75183BFQC

LE75183CFQC

LE75183AFSC

Le75183BFSC

Le75183CZFSC

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

European Council to minimize the environmental impact of electrical

equipment.

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

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

28 Pin SOIC (GULL)

Tube

32 Pin QFN

Tray

20 Pin SOIC (GULL)

Tube

Package Type

Packing

Document ID#:081126

Version

April 2011

Ordering Information

Applications

•

Central office

DLC

PBX

DAML

HFC/FITL

Description

The VoiceEdge™ family VE750 series of Line Card

Access Switches (LCAS), which includes the Le75181,

Le75282 and Le75183 devices, 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 pin-

for-pin

replacement

for

the

traditional

electromechanical relay (EMR) solution, provide the

equivalent switching functionality. The VE750 series of

LCAS is meant as a solid-state alternative to the

EMRs.

The Le75183A/B/C devices are pin-for-pin compatible

with Zarlink’s L7583A/B/C devices.

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.

Related Literature

•

081123 Le75282 Dual Intelligent Line Card

Access Switch Data Sheet

081105 Le75181 Ringing Access Switch Data

Sheet

080754 Le58QL061/063 QLSLAC Data Sheet

080676 Le5711 Dual SLIC Data Sheet

081047 Le5712 Dual SLIC Data Sheet

Zarlink Semiconductor Inc.

Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.

Le75183

Table of Contents

Data Sheet

1.0 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.0 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.0 Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.0 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.0 Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Environmental Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 Electrical Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.3 Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.0 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.1 Summary of Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.2 Supply Currents and Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.0 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.1 Device Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.0 Zero Cross Current Turn Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9.0 Switching Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10.0 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

11.0 Loss of Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

12.0 Impulse Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.0 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.1 Integrated SLIC Device Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.1.1 Diode Bridge/SCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.1.2 Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.1.3 Temperature Shutdown Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

13.1.4 External Secondary Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

14.0 Typical Performance Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

15.0 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

16.0 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

16.1 28-Pin, Plastic SOIC (GULL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

16.2 20-Pin, Plastic SOIC (GULL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

16.3 32-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

17.0 Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

17.1 Revision A1 to B1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

17.2 Revision B1 to C1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

17.3 Revision C1 to C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

17.4 Revision C2 to Ver 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

17.5 Revision Ver 5 to Ver 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Zarlink Semiconductor Inc.

Le75183

1.0

Product Description

Data Sheet

The Le75183A/B/C Line Card Access Switch is a monolithic solid-state device providing the equivalent switching

functionality of three 2 form C switches. The Le75183 is designed to provide power ringing access, line test access

(test out), and SLIC test access (test in) 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. An additional pair of

solid-state contacts are also available to provide access for testing of the ringing generator.

The Le75183A/B has seven states: the idle talk state (line break switches closed, all other switches open), the

power ringing state (ringing access switches closed, all other switches open), loop access (test out) state (loop

access (test out) switches closed, all other switches open), SLIC test state (test in switches closed, all other

switches open), simultaneous loop and SLIC access state (loop and test in switches closed, all others open),

ringing generator test state (ring test switches closed, all others open), and an all OFF state. The seven states in

the Le75183A/B are also in the Le75183C, with an additional simultaneous test-out and ring-test state, making the

Le75183C appropriate for digital loop carrier and other Telcordia TR-57 applications.

The Le75183 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 lead

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 Le75183A and Le75183C 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. This is shown in block diagram as version A/C. 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 Le75183B version provides only an integrated diode bridge along with current limiting and thermal shutdown

(see block diagram for version B). 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.

To protect the Le75183 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 Le75183

will meet all relevant ITU-T, LSSGR, FCC, or UL* protection requirements.

The Le75183 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 Le75183 especially

appropriate for remote power applications such as DAML or FOC/FITL or other Telcordia TA 909 applications

where power dissipation is particularly critical.

A battery voltage is also used by the Le75183, only as a reference for the integrated protection circuit. The Le75183

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 and ring test switch will draw a

nominal 2 mA from the ring generator.

The default power up state of Le75183 is in all OFF state, unless otherwise being overwritten by external controls.

The Le75183 device is packaged in a 20-pin, plastic SOIC (GULL) (Le75183ADSC/BDSC/CDSC), a 32-pin QFN

(Le75183AFQC/BFQC/CFQC), and a 28-pin, plastic SOIC (GULL) (Le75183AFSC/BFSC/CZFSC). The 28-pin

package is available to support existing designs. For new designs, it may be advantageous to use the other two

smaller size packages.

Zarlink Semiconductor Inc.

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