le75181 Zarlink Semiconductor, le75181 Datasheet

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le75181

Manufacturer Part Number
le75181
Description
Ringing Access Switch
Manufacturer
Zarlink Semiconductor
Datasheet

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APPLICATIONS
FEATURES
RELATED LITERATURE
ORDERING INFORMATION
1.
2.
A
NOTE: On August 3, 2007, Zarlink Semiconductor acquired the products and
technology of Legerity Holdings.
LE75181ABSC
LE75181BBSC
LE75181CBSC
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
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 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.
Device
Voice Solution
16-Pin SOIC, GULL (Green)
Package Type
1
Tube
Packing
2
DESCRIPTION
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 pin-
for-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
Legerity’s L7581A/B device, and the Le75181C device is pin-
for-pin compatible with Legerity’s L8581A device.
Legerity 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
TRINGING
TRINGING
FGND
TLINE
TBAT
FGND
TLINE
TBAT
VDD
TSD
VDD
TSD
SW3
SW3
Document ID# 081105
Rev:
Distribution:
SW1
SW1
Ringing Access Switch
Le75181A/C
Le75181B
Temperature Shutdown
Temperature
Shutdown
SW2
SW2
Circuit
& Trip
SCR
SW4
E
Public Document
Le75181
SW4
VE750 Series
Date:
Version: 2
RLINE
RRINGING
VBAT
RBAT
RLINE
RRINGING
LATCH
INPUT
DGND
VBAT
RBAT
LATCH
INPUT
DGND
Sep 18, 2007

Related parts for le75181

le75181 Summary of contents

Page 1

... The VE750 series LCAS is meant as a solid-state alternative to the EMRs. The Le75181A/B device is pin-for-pin compatible with Legerity’s L7581A/B device, and the Le75181C device is pin- for-pin compatible with Legerity’s L8581A device. Legerity 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 ...

Page 2

... Loss of Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Impulse Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Protection .10 Integrated SLIC Device Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Physical Dimensions .15 16-Pin, Plastic SOIC (GULL) (ASC/BSC/CSC .15 Revision history .16 Revision .16 Revision .16 Revision .16 Revision .16 Revision .16 2 Zarlink Semiconductor Inc. ...

Page 3

... 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. ...

Page 4

... Switching Behavior section of this data sheet for input pin description output, will read HIGH when device is in its operational mode and in the thermal shutdown mode. In the Le75181, the thermal shutdown mechanism cannot be disabled. Battery voltage. Used as a reference for protection circuit. ...

Page 5

... JESD22 Class 1C compliant −40° to 85°C Typ 5 — rises above –10 V, the device will enter an all OFF state and remain in BAT 5 Zarlink Semiconductor Inc. Max Unit 110 °C 150 ° 260 ° – +0.3 ...

Page 6

... ELECTRICAL CHARACTERISTICS Summary of Assumptions Unless otherwise noted, the test conditions are defined by the Le75181 device application circuit shown in with: = − 5.0 V. BAT DD Supply Currents and Power Dissipation Operational State Condition Power Ringing VDD=5V, VBAT=-48V Idle/Talk VDD=5V, VBAT=-48V SPECIFICATIONS Device Specifications Table 1 ...

Page 7

... Sensitivity *This parameter is not tested in production. Choice of secondary protector should ensure this rating is not exceeded. †Applied voltage is 100 Vp-p square wave at 100 Hz. Not tested in production. Test Condition @ 50 Hz/60 Hz Test Condition 7 Zarlink Semiconductor Inc. Measure Min Typ Max Iswitch — — 1 Iswitch — ...

Page 8

... The probability of this event depends on the characteristics of the given SLIC device and of the holding current of the Le75181A/ C devices. The SCR hold current distribution is designed to be safely away from the test limit for Le75181A device. The limit for Le75181C device is 110 mA. The higher the distribution, the lower the probability of the latch. ...

Page 9

... As an additional protection feature, the Le75181 device monitors the battery voltage. Upon loss of battery voltage, the Le75181 will automatically enter an all OFF state and remain in that state until the battery voltage is restored. The Le75181 is designed so that the device will enter the all OFF state if the battery rises above approximately –10 V and will remain off until the battery drops below approximately – ...

Page 10

... With the above integrated protection features, only one overvoltage secondary protection device on the loop side of the Le75181 device is required. The purpose of this device is to limit fault voltages seen by the Le75181 device so as not to exceed the breakdown voltage or input-output isolation rating of the device. To minimize stress on the Le75181 device, use of a foldback- or crowbar-type device is recommended ...

Page 11

... V —Minimum magnitude breakdown voltage of Le75181 break switch. breakdownmin(break) V —Minimum magnitude breakdown voltage of Le75181 ring access switch. breakdownmin(ring) V —Maximum magnitude peak voltage of ringing signal. ringingpeakmax Series current-limiting fused resistors or PTC resistors should be chosen so as not to exceed the current rating of the external secondary protector. Refer to the manufacturer’ ...

Page 12

... BREAK SWITCHES Figure 3. Protection Circuit B Version dc CURRENT-LIMIT BREAK SWITCHES – BAT <1 µA dc CURRENT LIMIT (OF BREAK SWITCHES) Figure 4. Switches 1 and LIMIT R –1.5 V 1.5 V – LIMIT CURRENT LIMITING –I 12 Zarlink Semiconductor Inc CURRENT LIMITING 2 ...

Page 13

... Figure 5. Switch LIM1 2/3 R –V –V –V –1.5 R MAX 1.5 –I LIM2 –I LIM1 Figure 6. Switch –V OS – –I 13 Zarlink Semiconductor Inc LIM2 MAX +V ...

Page 14

... A parallel in/parallel out data latch is integrated into the Le75181 device. Operation of the data latch is controlled by the logic level input pin LATCH. The data input to the latch is the INPUT pin of the Le75181 device, and the output of the data latch is an internal node used for state control. ...

Page 15

... BSC 10.00 10.30 10.65 0.394 0.25 0.50 0.75 0.009 0.40 0.70 1.27 0.015 0 deg - 8 deg 0 deg 0.00 0.01 0.000 10.10 10.31 10.50 0.398 16-Pin SOIC 15 Zarlink Semiconductor Inc. Inch Nom Max 0.100 0.104 0.006 0.012 0.016 0.020 0.010 0.012 0.295 0.299 0.050 BSC 0.406 0.419 0.020 0.029 0.028 0.050 - 8 deg - 0.004 0.406 0.413 ...

Page 16

... REVISION HISTORY Revision • Page 1, changed OPNs from Le75181xx to Le75181xxC. • Page 3, towards the end, changed Le75181xx to Le75181xxC. • Page 16, changed Le75181xS to Le75181xSC. • Page 17, changed Le75181xQ to Le75181xQC. • Page 17, updated drawing for QFN package by adding line brakes. Revision • ...

Page 17

... I C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo are trademarks, and Legerity, the Legerity logo and combinations thereof are registered trademarks of Zarlink Semiconductor Inc. All other trademarks and registered trademarks are the property of their respective owners. © 2007 Zarlink Semiconductor Inc. All Rights Reserved. ...

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