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HC5517_00

更新时间： 2024-09-24 03:41:19
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英特矽尔 - INTERSIL 调制解调器综合业务数字网WLL
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19页 418K
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3 REN Ringing SLIC For ISDN Modem/TA and WLL

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HC5517  
®
October 2000  
File Number 4147.3  
3 REN Ringing SLIC For ISDN Modem/TA  
and WLL  
Features  
• Thru-SLIC Open Circuit Ringing Voltage up to  
77V /54V , 3 REN Capability at 44V  
RMS  
The HC5517 is a ringing SLIC designed to accommodate a  
wide variety of local loop applications. The various applications  
include, basic POTS lines with answering machines and fax  
capabilities, ISDN networks, wireless local loop, and hybrid  
fiber coax (HFC) terminals. The HC5517 provides a high  
degree of flexibility with open circuit tip to ring DC voltages, user  
defined ringing waveforms (sinusoidal to square wave), ring trip  
detection thresholds and loop current limits that can be tailored  
for many applications. Additional features of the HC5517 are  
complex impedance matching, pulse metering and transhybrid  
balance. The HC5517 is designed for use in systems where a  
separate ring generator is not economically feasible.  
PEAK  
RMS  
• Sinusoidal Ringing Capability  
• DI Process Provides Substrate Latch Up Immunity when  
Driving Inductive Ringers  
• Adjustable On-Hook Voltage for Fax and Answering  
Machine Compatibility  
• Resistive and Complex Impedance Matching  
• Programmable Loop Current Limit  
• Switch Hook and Adjustable Ring Trip Detection  
• Pulse Metering Capability  
The device is manufactured in a high voltage Dielectric Isolation  
(DI) process with an operating voltage range from -16V, for off-  
hook operation and -80V for ring signal injection. The DI  
process provides substrate latch up immunity, resulting in a  
robust system design. Together with a secondary protection  
diode bridge and “feed” resistors, the device will withstand  
1000V lightning induced surges, in a plastic package.  
• Single Low Voltage Positive Supply (+5V)  
Applications  
• Solid State Line Interface Circuit for Wireless Local Loop,  
Hybrid Fiber Coax, Set Top Box, Voice/Data Modems  
• Related Literature  
- AN9606, Operation of the HC5517 Evaluation Board  
- AN9607, Impedance Matching Design Equations  
- AN9628, AC Voltage Gain  
A thermal shutdown with an alarm output and line fault  
protection are also included for operation in harsh  
environments.  
- AN9608, Implementing Pulse Metering  
Part Number Information  
- AN9636, Implementing an Analog Port for ISDN Using  
the HC5517  
TEMP.RANGE  
o
PART NUMBER  
HC5517IM  
( C)  
PACKAGE  
28 Ld PLCC  
28 Ld PLCC  
28 SOIC  
PKG. NO.  
N28.45  
N28.45  
M28.3  
- AN549, The HC-5502S/4X Telephone Subscriber Line  
Interface Circuits (SLIC)  
-40 to 85  
0 to 75  
HC5517CM  
HC5517IB  
-40 to 85  
0 to 75  
HC5517CB  
28 SOIC  
M28.3  
Block Diagram  
V
V
RX  
TX  
TIP FEED  
4-WIRE  
INTERFACE  
TIP SENSE  
2-WIRE  
INTERFACE  
V
RING  
LOOP CURRENT  
DETECTOR  
RING FEED  
- IN 1  
-
RING SENSE 1  
RING SENSE 2  
+
FAULT  
DETECTOR  
OUT 1  
V
CURRENT  
LIMIT  
REF  
SHD  
ALM  
RTI  
I
RING TRIP  
DETECTOR  
LMT  
V
BAT  
V
CC  
BIAS  
RTD  
RDO  
AGND  
BGND  
RELAY  
DRIVER  
IIL LOGIC INTERFACE  
F1  
F0  
RS TST  
RDI  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2002. All Rights Reserved  
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