Le79R241JC Legerity, Inc., Le79R241JC Datasheet
Le79R241JC
Manufacturer Part Number
Le79R241JC
Description
Manufacturer
Legerity, Inc.
Datasheet
1.LE79R241JC.pdf
(28 pages)
Specifications of Le79R241JC
Date_code
07+
Packing_info
PLCC
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LE79R241JC
Manufacturer:
LEGERITY
Quantity:
20 000
Part Number:
Le79R241JCB
Manufacturer:
LEGERITY
Quantity:
20 000
APPLICATIONS
FEATURES
■
Enables a cost effective voice solution for long or short
loop applications providing POTS and integrated test
capabilities
— CO
— DLC
— PBX/KTS
— Pair gain
Monitor of two-wire interface voltages and currents
supports
— Voice transmission
— Internal chip ring generation
— Programmable DC feed characteristics
— Selectable off-hook and ground-key thresholds
— Subscriber line diagnostics
— Power cross and fault detection
Supports internal short loop or external ringing
+5 V and battery supplies
Dual battery operation for system power saving
— Automatic battery switching
— Intelligent thermal management
Compatible with inexpensive protection networks
— Accommodates low tolerance fuse resistors or PTC
Metering capable
— 12 kHz and 16 kHz
— Smooth polarity reversal
Tip-open state supports ground start signaling
Integrated test load switches/relay drivers
5 REN with DC offset trapezoid.
— For US standard:
— drives ring up to 4.4 kft of 26 gauge wire.
— drives ring up to 7 kft of 24 gauge wire.
— For European (British) standard:
— drives ring up to 1.7 km of 0.5 mm copper cable.
Space Saving Package Options (8x8 QFN)
thermistors
– Independent of battery
– Current limited
–
–
–
–
–
Leakage resistance
Loop resistance
Line capacitance
Bell capacitance
Foreign voltage sensing
Intelligent Subscriber Line Interface Circuit
ORDERING INFORMATION
1.
2.
3.
DESCRIPTION
The Le79R241 Intelligent Subscriber Line Interface Circuit
(ISLIC™) device, in combination with a VE790 series ISLAC™
device, implements the telephone line interface function. This
enables the design of a low cost, high performance, fully
software programmable line interface for multiple country
applications worldwide. All AC, DC, and signaling parameters
are fully programmable via microprocessor or GCI interfaces
on the VE790 series ISLAC device. Additionally, the Le79R241
ISLIC device 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
A VE790 series ISLAC™ device must be used with this part.
Le79R241JC
Le79R241DJC
Le79R241QC
Le79R241FQC
080248 Le79231 ISLIC™ Device Data Sheet
080253 Le79R251 ISLIC™ Device Data Sheet
080250 Le79Q224x Quad ISLAC™ Device Data Sheet
081065 Le79228 Quad ISLAC™ Device Data Sheet
080262 VE790 Series Evaluation Board User’s Guide
080804 Le79R2xx/Le79Q224x Chip Set User’s Guide
080923 Le79R2xx/Le79228 Chip Set User’s Guide
081103 Le79610 PacketSLAC™ Device Data Sheet
Due to size constraints, QFN devices are marked by omitting the
“Le” prefix and the performance grade dash character. For
example, Le79R241QC is marked 79R241QC.
The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
For delivery using a tape and reel packing system, add a "T" suffix
to the OPN (Ordering Part Number) when placing an order.
Device
32-pin PLCC
32-pin PLCC (Green)
32-pin QFN
32-pin QFN (Green)
Package Type
Document ID# 080249
Rev:
Distribution:
1, 2
Le79R241
O
Public Document
VE790 Series
Tube
Tray
Date:
Version: 1
Packing
Dec 5 2005
3
™
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