™
A D V A N C E D C O P Y
Le75183
Line Card Access Switch
VE750 Series
APPLICATIONS
DESCRIPTION
Central office
DLC
PBX
DAML
HFC/FITL
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/D devices are pin-for-pin compatible with
Legerity’s L7583A/B/C/D devices.
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.
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
BLOCK DIAGRAM
Le75183A/C
VBAT
FGND
SCR
& Trip
Circuit
Default power up state
SW1
SW2
SW6
RTESTin
RBAT
TTESTin
TBAT
RELATED LITERATURE
SW3
SW4
RLINE
TLINE
SW5
TRINGING
081123 Le75282 Dual Intelligent Line Card Access Switch Data
RRINGING
Sheet
SW7
SW8
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
RTESTout
LATCH
TTESTout
SW10
SW9
INTESTin
INRING
VDD
TSD
Control
Logic
INTESTout
DGND
ORDERING INFORMATION
Le75183B/D
VBAT
FGND
Device
Le75183ASC
Le75183BSC
Le75183CSC
Le75183DSC
Le75183AQC
Le75183BQC
Le75183CQC
Le75183DQC
Le75183AESC
Le75183BESC
Le75183CESC
Le75183CZESC
Le75183DESC
Package
20-Pin SOIC (GULL)
SW1
SW2
RTESTin
RBAT
TTESTin
TBAT
SW3
SW5
SW4
SW6
RLINE
TLINE
RRINGING
TRINGING
32-Pin QFN
SW7
SW8
RTESTout
LATCH
TTESTout
SW9
SW10
INTESTin
INRING
VDD
TSD
Control
Logic
28-pin SOIC (GULL)
INTESTout
DGND
Document ID# 081126 Date:
Aug 24, 2004
1
Rev:
B
Version:
Distribution:
Public Document