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LE79R70JCT PDF预览

LE79R70JCT

更新时间： 2024-12-02 05:29:55
品牌 Logo 应用领域
美高森美 - MICROSEMI /
页数 文件大小 规格书
23页 611K
描述
SLIC, 2-4 Conversion, Bipolar, PQCC32,

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LE79R70JCT 数据手册

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™
Le79R70  
Ringing Subscriber Line Interface Circuit  
VE580 Series  
APPLICATIONS  
„ Integrated Access Devices (IADs)  
„ Network Interface Units (NIUs)  
„ Cable Modems  
„ DSL Modems  
„ Set Top / House Side Boxes  
„ Intelligent PBX  
„ Pain Gain  
„ FXS Cards  
„ Voice over ISDN or T1/E1  
„ Smart Residential Gateways  
ORDERING INFORMATION  
Device1  
Package Type2, 3  
Packing5  
Le79R70JC  
32-pin PLCC, No Pol. Rev. Tube  
32-pin PLCC, No Pol. Rev.  
Le79R70DJC  
Le79R70-1JC  
Le79R70-1DJC  
Tube  
(Green package)  
32-pin PLCC, Pol. Rev.  
32-pin PLCC, Pol. Rev.  
(Green package)  
Tube  
Tube  
Le79R70QC  
Le79R70-1QC  
32-pin QFN, No Pol. Rev.  
32-pin QFN, Pol. Rev.  
Tray  
Tray  
32-pin QFN, Pol. Rev.  
(Green package)  
Le79R70-1FQC  
Tray  
1. Legerity reserves the right to fulfill all orders for this device with  
parts marked with the "Am" part number prefix, until such time as  
all inventory bearing this mark has been depleted. It should be  
noted that parts marked with either the "Am" or the "Le" part  
number prefix are equivalent devices in terms of form, fit, and  
function. The only difference between the two is in the part  
number prefix appearing on the topside mark.  
„ WLL, APON, FITL, NGN, and all other short-loop CPE/  
Enterprise telephony applications  
FEATURES  
„ Ideal for ISDN-TA and set top applications  
„ On-chip ringing with on-chip ring-trip detector  
„ Low Standby state power  
2. Green package meets RoHS Directive 2002/95/EC of the  
European Council to minimize the environmental impact of  
electrical equipment.  
„ Battery operation:  
3. Due to size constraints, QFN devices are marked by omitting the  
“Le” prefix and the performance grade dash character. For  
example, Le79R70-1QC is marked 79R701QC.  
— VBAT1: –40 V to –67 V  
— VBAT2: –19 V to VBAT1  
„ On-chip battery switching and feed selection  
„ On-hook transmission  
„ Polarity reversal option  
4. Not available for new customers.  
5. For delivery using a tape and reel packing system, add a "T" suffix  
to the OPN (Ordering Part Number) when placing an order.  
„ Programmable constant-current feed  
„ Programmable open circuit voltage  
„ Programmable loop-detect threshold  
„ Current gain = 1000  
„ Two-wire impedance set by single component  
„ Ground-key detector  
DESCRIPTION  
The Le79R70 Ringing Subscriber Line Interface Circuit  
(RSLIC) device is a bipolar monolithic SLIC that offers on-chip  
ringing. Designers can achieve significant cost reductions at  
the system level for short-loop applications by integrating the  
ringing function on chip. Examples of such applications would  
be ISDN Terminal Adaptors and set top boxes. Using a CMOS-  
compatible input waveform and wave shaping R-C network,  
the Le79R70 Ringing SLIC device can provide trapezoidal  
wave ringing to meet various design requirements.  
„ Tip Open state for ground-start lines  
„ Internal VEE regulator (no external –5 V power supply  
required)  
„ Two on-chip relay drivers and snubber circuits  
„ Space-saving package options (8x8 QFN)  
See the Le79R70 Block Diagram, on page 3.  
RELATED LITERATURE  
„ 080917 VE790 Series RSLIC Device Product Brief  
„ 080158 Le79R70/79/100/101 Ringing SLIC Devices  
Technical Overview  
„ 080255 Le71HE0040J Evaluation Board User’s Guide  
„ 080753 Le58QL02/021/031 QLSLAC™ Data Sheet  
Document ID#: 080211 Date:  
Dec 6, 2005  
1
Rev:  
I
Version:  
Distribution:  
Public Document  
1234567...23

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