Le88221/241
Dual Channel Auto Battery Switching (ABS)
VoicePort™ Device
VE880 Series
Document ID# 081265
June 2015
APPLICATIONS
ORDERING INFORMATION
Voice enabled Cable and DSL Modems
Voice over IP/ATM - Integrated Access Devices (IAD)
Residential VoIP Gateways and Routers
Media Terminal Adapters (MTA) Standalone & Embedded
Device OPN
Le88221DLC
Le88241DLC
Package Type
Packing2
Tray
Tray
80-pin eLQFP (Green)1
1. The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
Fiber to the User/Premise/Home (FTTH/P/H), Fiber in
the Loop (FITL) Optical Network Terminals (ONT)
Wireless Local Loop (WLL), PBX, ISDN NT1/TA
Set-Top Box, Home Side Box
2. For delivery using a tape and reel packing system, add a "T" suffix
to the OPN (Ordering Part Number) when placing an order.
FEATURES
DESCRIPTION
Complete BORSCHT function in a single VoicePortTM
The Legerity Le88221/241 Automatic Battery Switching (ABS)
VoicePort™ device implements a dual-channel telephone line
interface by providing all the necessary voice interface
functions from the high voltage subscriber line to the µP/DSP
digital interface. The ABS device can operate from external
battery supplies, or from supplies generated by the on-chip
switching regulator controllers. This device reduces system
level cost, space, and power by achieving the highest level of
voice integration possible. Designers benefit by having a
simple, cost effective, low-power and dense, interface design
without sacrificing features or functionality. The programmable,
feature rich VoicePort devices provide a highly functional line
interface which meets the requirements of short and medium
loop (up to 1500 Ohms total at 1 REN) applications. Features
include: high voltage switching regulator, self-test, line test
capabilities, integrated ringing (up to 110-Vpk), worldwide
software programmability, flexible signal generator with tone
cadencing, caller ID generation and all BORSCHT functions.
These VoicePort device features are crucial for designing cost-
effective, full-featured Voice over Broadband solutions.
device for two channels
— Battery Feed, Over-voltage support, integrated Ringing,
line Supervision, Codec, Hybrid (2W/4W), Test
Integrated Power Management
— Integrated high voltage switching regulator controllers
–
–
Wide input voltage range (VSW =+3.3 V to +35 V)
Generates supplies for VBH, VBM & VBL
— Low power Idle and On-hook transmission states
Worldwide Programmability
— Two-wire AC impedance, Balance Impedance, Gain
— DC feed voltage and current limit
— Ringing frequency, voltage and current limit
— 12 kHz and 16 kHz Metering
— Programmable loop closure and ring trip thresholds
Ringing
— 5 REN with pin for pin compatible 100-V (Le88221) and
120-V (Le88241) devices
— Up to 110-Vpk internal balanced sinusoidal or
trapezoidal ringing with programmable DC offset
— Unbalanced ringing for PBX trunk compatibility
(Le88241 device only)
VOICEPORT™ DEVICE BLOCK DIAGRAM
Powerful signal generator
VBL VBM VBH
— Universal Caller ID generation
— Up to 4 simultaneous tones
TIPD 1
PCLK/DCL
PLL
High Voltage
TIPT 1
RINGT 1
RINGD 1
FS/FSC
Line Driver
DXA/DU
DRA/DD
— Automatic cadencing feature
GCI Interface
(GCI)
TAC1
RAC1
RTV1
Voice Signal
Processing
Subscriber Loop Test/Self Test support
LFC1
RSN1
IHL1
PCM Interface
and Time Slot
Assigner
Signaling
Control
— Comprehensive line sensing
— Integrated self test capabilities
— Line fault detection and reporting
(PCM)
Supervision
Processing
TDC1
RDC1
TSCA
4
Input / Output
I/O2i - I/O1i
Signal
–
Loop supervision, AC/DC faults
Generation
DCLK/S0
DIN/S1
DOUT
CS/PG
INT/S2
RST
Signal
Generation
Microprocessor
Interface
(MPI)
— Test load switch (Le88241)
Supervision
Processing
RDC2
TDC2
Pin selectable PCM/MPI or GCI interface
G.711 µ-law, A-law, or 16 bit linear coding
Integrated 150 mW 3-V or 5-V Relay Driver
— Supports lifeline POTS in DSL IAD applications
Small footprint package - Exposed pad 80-pin LQFP
Minimal external discrete components required
IHL2
RSN2
LFC2
Signaling
Control
SWCMPY
SWVSY
SWISY
SWOUTY
SWCMPZ
SWVSZ
SWISZ
Switching
regulator
controllers
RTV2
RAC2
TAC2
Voice Signal
Processing
RINGD 2
RINGT 2
TIPT 2
SWOUTZ
XB
High Voltage
Line Driver
Analog
Reference
TIPD 2
VBL VBM VBH
VREF
IREF
Microsemi Corporation
Copyright 2015, Microsemi Corporation. All Rights Reserved.
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