Le79R101
Ringing Subscriber Line Interface Circuit
Ringing SLIC device
APPLICATIONS
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Integrated Access Device (IAD)
Smart Residential Gateway (SRG)
Set Top/House Side Box
Network Interface Unit (NIU)
Cable Modem
Cable PC
Fiber in the Loop (FITL)
Fiber to the Home (FTTH)
Wireless Local Loop (WLL)
Intelligent PBX
ISDN TA/NT1
ORDERING INFORMATION
Devices*
Le79R1011JC
Le79R1012JC
Le79R1013JC
Le79R1014JC
Notes:
-1: 52 dB Longitudinal Balance, Polarity Reversal
-2: 63 dB Longitudinal Balance, Polarity Reversal
-3: 52 dB Longitudinal Balance, No Polarity Reversal
-4: 63 dB Longitudinal Balance, No Polarity Reversal
Package
32-pin PLCC
FEATURES
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Meets UL1950 safety requirements
Through sinusoidal ringing with DC offset
On-chip ring-trip detector
Low standby state power
Battery operation:
— V
BAT1
: –15 V to –99 V
— V
BAT2
: –15 V to V
BAT1
On-chip battery switching and feed selection
On-hook transmission
Two-wire impedance set by single external impedance
Programmable constant-current feed
Programmable Open Circuit voltage
Programmable loop-detect threshold
Current gain = 1000
Ground-key detector
Polarity reversal option available
Internal V
EE
regulator (no external –5 V power supply
required)
Two on-chip relay drivers and snubber circuits
* Legerity reserves the right to fulfill all orders for this device with parts
marked with the "Am" part number prefix, until such time as all inven-
tory bearing this mark has been depleted. It should be noted that parts
marked with either the "Am" or the "Le" part number prefix are equiva-
lent devices in terms of form, fit, and function. The only difference be-
tween the two is in the part number prefix appearing on the topside
mark.
DESCRIPTION
The Le79R101 Ringing SLIC device is a bipolar monolithic
SLIC that offers on-chip sinusoidal ringing. The sinusoidal
ringing waveform generated through the Le79R101 device has
an advantageously low distortion, and satisfies the traditional
ringing waveform requirements of small PBX, WLL, and
Pairgain applications. The Le79R101 Ringing SLIC device also
offers offset ringing and satisfies most phones that require an
offset from ring to tip during ringing.
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BLOCK DIAGRAM
Relay
Driver
RTRIP1
RTRIP2
Relay
Driver
RYOUT2
RYE
RYOUT1
D1
A(TIP)
Ring-Trip
Detector
Ground-Key
Detector
Two-Wire
Interface
Off-Hook
Detector
Input Decoder
and Control
D2
C1
C2
C3
E1
DET
B(RING)
Signal
Transmission
RD
VTX
RSN
RREF
VRING
RDC
RDCR
RSGL
RSGH
HPB
RELATED LITERATURE
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080255 Le79R79/R100/R101 SLIC Evaluation Board
User’s Guide
HPA
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080149 Le79R79 Ringing SLIC User’s Guide
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080158 Le79R70/79/100/101 Ringing SLIC Technical
Overview
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080458 Le79R100/101 Vs. Le79R79 Device
Comparison Brief
Power-Feed
Controller
VBAT2
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080753 Le58QL02/021/031 QLSLAC™ Data Sheet
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080754 Le58QL061/063 QLSLAC™ Data Sheet
VBAT1
Switch
Driver
VCC
VNEG
BGND
AGND/DGND
Le79R101 Data Sheet
Document ID# 080280
080280
Date:
Date:
May 15, 2002
Jul 07,
Rev:
D
E
Version:
1
Distribution:
Public Document
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
