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LE79555-4FQCT

更新时间： 2024-11-30 20:09:23
品牌 Logo 应用领域
美高森美 - MICROSEMI /
页数 文件大小 规格书
25页 651K
描述
SLIC, PQCC32,

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中文翻译

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LE79555-4FQCT 数据手册

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™
Le79555  
Subscriber Line Interface Circuit  
VE580 Series  
APPLICATIONS  
DESCRIPTION  
The Le79555 device, part of Legerity’s VoiceEdge™ family  
VE580 series of devices, was designed for high-density POTS  
applications requiring a power saving, small footprint SLIC  
device. The new SLIC device fulfills today's requirements for  
POTS linecard markets requiring a balance of high-  
performance cost-effective silicon components. The Le79555  
device delivers economical linecard solutions by offering power  
and space savings to linecard designers. The on-chip  
switching regulator allows for power dissipation to be  
minimized for the entire system. Another benefit is that the  
device is offered in a reduced footprint package type, a 44-pin  
TQFP. This small footprint saves designers board space, thus  
increasing the density or number of lines on the board.  
„ Ideal for high-density, low-power linecard applications  
FEATURES  
„ Control states: Active, Reverse Polarity, Tip Open,  
Ringing, Standby, and Open Circuit  
„ Low Standby power  
„ –40 to –58 V battery operation  
„ On-hook transmission  
„ Two-wire impedance set by single external impedance  
„ Programmable constant-current feed  
„ Low Off-Hook Active Overhead Voltage  
„ Programmable loop-detect threshold  
„ Ground-start detector  
Legerity offers a range of compatible SLAC™ devices  
providing a complete line circuit that can be optimized for  
varying requirements. The SLIC device is designed to operate  
with a range of SLAC devices from low cost, non-  
programmable to more advanced, highly programmable  
options viable for a range of applications.  
„ Programmable ring-trip detect threshold  
„ No –5 V supply required  
„ Three on-chip relay drivers and relay snubbers, one  
ringing and two general purpose  
„ Tip Open state for ground-start lines  
„ On-chip switching regulator for Low power dissipation  
„ Supports 30 mA for Active, Norma,l and Reverse  
Polarity operation  
RELATED LITERATURE  
„ 080125 SLIC Switcher Circuit Application Note  
„ 080725 Le79555 Switching Regulator Applications  
„ 080753 Le58QL02/021/031 QLSLAC™ Data Sheet  
„ 080754 Le58QL061/063 QLSLAC™ Data Sheet  
ORDERING INFORMATION  
Standard Packages  
Device  
Performance Grade/Package  
Packing2  
BLOCK DIAGRAM  
Le79555-1VC  
Le79555-1QC  
52 dB Pol. Rev., 44-pin TQFP  
52 dB Pol. Rev., 32-pin QFN  
Tray  
Ring Relay Driver  
Relay Driver  
RINGOUT  
RYOUT1  
RYOUT2  
Le79555-2VC  
Le79555-2QC  
63 dB Pol. Rev., 44-pin TQFP  
63 dB Pol. Rev., 32-pin QFN  
Tray  
Tray  
Tray  
A(TIP)  
Le79555-3VC  
Le79555-3QC  
52 dB No Pol. Rev., 44-pin TQFP  
52 dB No Pol. Rev., 32-pin QFN  
Relay Driver  
Le79555-4VC  
Le79555-4QC  
63 dB No Pol. Rev., 44-pin TQFP  
63 dB No Pol. Rev., 32-pin QFN  
HPA  
C1  
C2  
C3  
Green Packages1  
D1  
D2  
Input Decoder  
and Control  
Device  
Le79555-1BVC  
Le79555-1FQC 52 dB Pol. Rev., 32-pin QFN  
Performance Grade/Package  
52 dB Pol. Rev., 44-pin TQFP  
Packing2  
HPB  
DET  
Two Wire  
Interface  
Ground  
Detector  
Tray  
VTX  
RSN  
Signal  
Transmission  
Le79555-2BVC  
Le79555-2FQC 63 dB Pol. Rev., 32-pin QFN  
Le79555-3BVC 52 dB No Pol. Rev., 44-pin TQFP  
Le79555-3FQC 52 dB No Pol. Rev., 32-pin QFN  
Le79555-4BVC 63 dB No Pol. Rev., 44-pin TQFP  
Le79555-4FQC 63 dB No Pol. Rev., 32-pin QFN  
63 dB Pol. Rev., 44-pin TQFP  
Tray  
Tray  
Tray  
B(RING)  
Off-Hook  
Detector  
RD  
RDC  
CAS  
VDC  
Power Feed  
Controller  
VREG  
DA  
Ring-Trip  
Detector  
DB  
1. The green package meets RoHS Directive 2002/95/EC of the  
European Council to minimize the environmental impact of  
electrical equipment.  
L
VBAT  
BGND  
Switching Regulator  
2. For delivery using a tape and reel packing system, add a "T" suffix  
to the OPN (Ordering Part Number) when placing an order.  
Document ID# 080686 Date:  
Aug 29, 2005  
1
Rev:  
E
Version:  
Distribution:  
Public Document  
1234567...25

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