Product Brief
VE880 Series
Dual Channel Wide band Automatic Battery Switching (ABS) VoicePort™ Device
Le88226/246
APPLICATIONS
ORDERING INFORMATION
Voice enabled Cable and DSL Modems
Device
Package
Voice over IP/ATM - Integrated Access Devices (IAD)
Smart Residential Gateways (SRG) and Routers
Media Terminal Adapters (MTA) Standalone & Embedded
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
Le88226DLC
Le88246DLC
80-pin eLQFP (Green package*)
*Green package meets RoHS Directive 2002/95/EC of the European
Council to minimize the environmental impact of electrical equipment.
DESCRIPTION
The Zarlink dual-channel wide band Le88226/246 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.
FEATURES
Complete BORSCHT function in a single VoicePortTM
device for two channels
— Battery Feed, Over-voltage support, integrated
Ringing, line Supervision, Codec, Hybrid (2W/4W), Test
— Small footprint package - Exposed pad 80-pin LQFP
— Minimal external discrete components required
Integrated Power Management
— Integrated high voltage switching regulator controllers
–
–
Wide input voltage range (VSW =+3.3V to +35 V)
Generates supplies for VBH, VBM & VBL
— Low power Idle and On-hook transmission states
Ringing
— 5 REN with pin for pin compatible 100-V (Le88226) and
120-V (Le88246) devices
— Up to 110-Vpk internal balanced sinusoidal or
trapezoidal ringing with programmable DC offset
— Unbalanced ringing for PBX trunk compatibility
(Le88246 device)
Pin selectable PCM/MPI or GCI interface
Worldwide Programmability
VOICEPORT™ DEVICE BLOCK DIAGRAM
— Two-wire AC impedance, Balance Impedance, Gain
— DC feed voltage and current limit
VBL VBM VBH
— Ringing frequency, voltage and current limit
— 12 kHz and 16 kHz Metering
TIPD 1
PCLK/DCL
PLL
High Voltage
Line Driver
TIPT 1
RINGT 1
RINGD 1
FS/FSC
— Programmable loop closure and ring trip thresholds
G.711 µ-law, A-law, or 16 bit linear coding
Wide band 16 kHz sampling mode
Powerful signal generator
DXA/DU
DRA/DD
GCI Interface
(GCI)
TAC1
RAC1
RTV1
Voice Signal
Processing
LFC1
RSN1
IHL1
PCM Interface
and Time Slot
Assigner
Signaling
Control
(PCM)
Supervision
Processing
TDC1
RDC1
TSCA
— Universal Caller ID generation
— Up to 4 simultaneous tones
— Automatic cadencing feature
4
Input / Output
I/O2i - I/O1i
Signal
Generation
DCLK/S0
DIN/S1
DOUT
CS/PG
INT/S2
RST
Signal
Generation
Microprocessor
Interface
Subscriber Loop Test/Self Test support
Supervision
Processing
RDC2
TDC2
(MPI)
— Comprehensive line sensing
IHL2
RSN2
LFC2
Signaling
Control
SWCMPY
SWVSY
SWISY
SWOUTY
SWCMPZ
SWVSZ
SWISZ
— Integrated self test capabilities
— Line fault detection and reporting
— Test load switch (Le88246)
Switching
regulator
controllers
RTV2
RAC2
TAC2
Voice Signal
Processing
RINGD 2
RINGT 2
TIPT 2
Integrated 150 mW 3-V or 5-V Relay Driver
SWOUTZ
XB
High Voltage
Line Driver
Analog
TIPD 2
Reference
VBL VBM VBH
VREF
IREF
Document ID# 081347 Date:
Sep 28, 2007
2
Rev:
A
Version:
Distribution:
Public Document
.
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