LE79Q2241VC Legerity, Inc., LE79Q2241VC Datasheet
LE79Q2241VC
Manufacturer Part Number
LE79Q2241VC
Description
Manufacturer
Legerity, Inc.
Datasheet
1.LE79Q2241VC.pdf
(40 pages)
Specifications of LE79Q2241VC
Case
TQFP-64
Date_code
2003+
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LE79Q2241VC
Manufacturer:
LEGERITY
Quantity:
20 000
APPLICATIONS
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FEATURES
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Voice over IP/DSL
Smart Residential Gateways (SRG), Home Gateway/
Router
Cable Telephony
Box, Cable Modem, Cable PC
Fiber
Home (FTTH)
Wireless Local Loop, Intelligent PBX
DLC-MUX
CO
High performance digital signal processor provides
programmable control of all major line card functions
Selectable PCM/MPI or GCI digital interfaces
General purpose I/O pins
+3.3 V DC operation
Exceeds LSSGR and ITU requirements
Supports external ringing with on-chip ring-trip circuit
Supports CallerNumber Identification (CID)
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A-law/µ-law and linear codec
– Transmit and receive gain
– Two-wire AC impedance
– Transhybrid balance
– Equalization
DC loop feeding
– Smooth or abrupt polarity reversal
Loop supervision
– Off-hook debounce circuit
– Ground-key and ring-trip filters
Ringing generation and control
Line and circuit testing
Tone generation
Metering generation at 12 kHz and 16 kHz
– Envelope shaping and level control
Modem Tone Detection
Supports most available master clock frequencies
from 512 kHz to 8.192 MHz
Automatic or manual ring-trip modes
— Fiber in the Loop (FITL), Fiber to the
— NIU, Set-Top Box, Home Side
—
Integrated Access Devices (IAD),
Quad Intelligent Subscriber Line Audio-processing Circuit
Le79Q2241/2242/2243
DESCRIPTION
The Le79Q2241/2242/2243 codec, in combination with a 790
series SLIC device, implements a fourchannel universal
telephone line interface. This enables the design of a single,
low cost, high performance, fully software programmable line
interface for multiple country applications. All AC, DC, and
s i g n a l i n g p a r a m e t e r s a r e f u l l y p r o g r a m m a b l e v i a
microprocessor or GCI interfaces. Additionally, the
Le79Q2241/2242/2243codec has integrated self-test and line-
test capabilities to resolve faults to the line or line circuit. The
integrated test capability is crucial for remote applications
where dedicated test hardware is not cost effective.
RELATED LITERATURE
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BLOCK DIAGRAM
ORDERING INFORMATION
A
B
A
B
A
B
A
B
Le79Q2241VC
Le79Q2242JC
Le79Q2243VC
1
1
2
2
3
3
4
4
080248 Le79231 790 Series SLIC Data Sheet
080249 Le79R241 790 Series SLIC Data Sheet
080253 Le79R251 790 Series SLIC Data Sheet
080804 Le79R2xx/Le79Q224x Chip Set User’s Guide
Protection
Networks
RC
and
Device
VoiceChip™ Family 790 Series
5
ISLIC
ISLIC
ISLIC
ISLIC
Resistors
External
Ringing
Sense
Document ID# 080250
Rev:
Distribution:
64-pin TQFP
68-pin PLCC
80-pin TQFP
BATH
BATP
BATL
5
Package
ADGND
ADGND
7
7
RSHB
RSLB
RSPB
I
Public Document
RREF
VREF
P
LD
LD
1
LD
LD
-P
1
3
2
1
2
3
4
Quad ISLAC
Date:
Version: 1
May 23, 2003
4
4
VCCA
VCCD
DGND
DGND
I/O
TSCA/G
TSCB
DRA/DD
DRB
DXB
DXA/DU
DCLK/S0
PCLK/FS
MCLK
FS/DCL
CS/RST
DIO/S1
INT
1
- I/O
1
2
4
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