HC55171BIM INTERSIL [Intersil Corporation], HC55171BIM Datasheet

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HC55171BIM

Manufacturer Part Number
HC55171BIM
Description
Low Cost 5 REN Ringing SLIC for ISDN Modem/TA and WL
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet
Low Cost 5 REN Ringing SLIC
for ISDN Modem/TA and WL
The HC55171B low cost, 5 REN ringing SLIC is designed to
accommodate a wide variety of short loop applications and
provides the same degree of flexibility as the high
performance HC55171. The flexible features include open
circuit tip to ring DC voltages, user defined ringing
waveforms, ring trip detection thresholds, and loop current
limits that can be tailored for many applications. Additional
features of the HC55171B are complex impedance
matching, pulse metering, and transhybrid balance. The
HC55171B is designed for use in short loop, low cost
systems where traditional ring generation is not
economically feasible.
The device is manufactured in a high voltage Dielectric
Isolation (DI) process. The DI process provides substrate
latch up immunity, resulting in a robust system design. A
thermal shutdown with an alarm output and line fault
protection are also included for operation in harsh
environments.
Ordering Information
Block Diagram
HC55171BIM
HC55171BIB
NUMBER
PART
TEMP. RANGE
RING SENSE 1
RING SENSE 2
-40 to 85
-40 to 85
RING FEED
TIP SENSE
(
o
TIP FEED
C)
AGND
BGND
V
V
V
REF
BAT
RTI
CC
63
28 Ld PLCC
28 Ld SOIC
PACKAGE
BIAS
INTERFACE
Data Sheet
2-WIRE
DETECTOR
RING TRIP
F1
N28.45
M28.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
PKG. NO.
LOOP CURRENT
DETECTOR
CURRENT
IIL LOGIC INTERFACE
DETECTOR
F0
FAULT
LIMIT
RS
TST
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
Features
• Load Drive Capability . . . . . . . . . . . . . . . . . . . . . . . 5 REN
• Trapezoidal, Square or Sine Wave Capability
• Ringing from -80V Battery . . . . . . . . . . . . . . . . . . . 75V
• Ringing from -75V Battery . . . . . . . . . . . . . . . . . . . 70V
• Ringing Current Independent of Loop Current Setting
• Ringing Crest Factor Independent of REN Loading
• Latchup Immune to Inductive Kick Back and Hot Plug
• Fax, Answering Machine and MTU Compatible
• Resistive and Complex Impedance Matching
• Programmable Loop Current Limit
• Switch Hook, Ring Trip and Ground Key Detection
• Single Low Voltage +5V Supply
Applications
• Solid State Line Interface Circuit for Hybrid Fiber Coax, Set
• Related Literature
Top Box, Voice/Data Modems
- AN9607, Impedance Matching Design Equations
- AN9628, AC Voltage Gain
- AN9636, Implementing an Analog Port for ISDN
- AN549, The HC-5502/4X Telephone SLIC
INTERFACE
4-WIRE
+
-
July 1998
DRIVER
RELAY
RDI
RTD
RDO
V
V
V
- IN 1
OUT 1
SHD
ALM
I
LIMIT
File Number 4422.1
RX
TX
RING
HC55171B
P-P
P-P

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HC55171BIM Summary of contents

Page 1

... Ordering Information PART TEMP. RANGE o NUMBER ( C) PACKAGE HC55171BIM - PLCC HC55171BIB - SOIC Block Diagram TIP FEED TIP SENSE 2-WIRE RING FEED INTERFACE ...

Page 2

... CC BAT Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +15V Operating Conditions Temperature Range HC55171BIM, HC55171BIB . . . . . . . . . . . . . . . . . . -40 Relay Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V to +12V Positive Power Supply ( + Negative Power Supply (V ) ...

Page 3

Electrical Specifications Unless Otherwise Specified, Typical Parameters are at T Operating Temperature Range 600 2-Wire terminating impedance. PARAMETER Level Linearity Absolute Delay, 2-Wire to 4-Wire Absolute Delay, 4-Wire to 2-Wire Absolute Delay, 4-Wire to 4-Wire Transhybrid Loss Total ...

Page 4

Electrical Specifications Unless Otherwise Specified, Typical Parameters are at T Operating Temperature Range 600 2-Wire terminating impedance. PARAMETER UNCOMMITTED RELAY DRIVER On Voltage Off Leakage Current TTL/CMOS LOGIC INPUTS (F0, F1, RS, TST, RDI) Logic Low ...

Page 5

TIP SENSE R 4.5K 100K 100K 15 RING SENSE 1 100K 100K 16 RING SENSE 2 4.5K 90K 90K 108k HC55171B DEVICE TRUTH ...

Page 6

Circuit Operation and Design Information FUNCTION 2-Wire to 4-Wire Gain 4-Wire To 2-wire Gain 4-Wire To 4-wire Gain Loop Current Limit Programming Impedance Matching Through SLIC Ringing The HC55171B uses linear amplification to produce the ringing signal result ...

Page 7

TABLE 3. CREST FACTOR PROGRAMMING RESISTOR FOR V = -65V BAT R CF RMS R TRAP TRAP 0 1.10 52.5 1330 660 1.15 49.8 1600 1040 1.20 47.8 1800 TABLE 4. CREST FACTOR PROGRAMMING RESISTOR FOR V = -60V BAT ...

Page 8

When the SLIC is matched to a 600 load and only the sense resistors are used, the 4-wire to 4-wire gain is equal to 5/12 as predicted by the design equations. Therefore, by configuring the transhybrid amplifier with a gain ...

Page 9

Pin Descriptions PLCC SYMBOL 1 AGND Analog Ground - Serves as a reference for the transmit output and receive input terminals Positive Voltage Source - Most Positive Supply external voltage connected to this pin ...

Page 10

Pinouts HC55171B (PLCC) TOP VIEW SHD 7 RTD 8 TST 9 ALM LIMIT Trapezoidal Ringing Application Circuit TIP RING BAT ...

Page 11

HC5517B Trapezoidal Ringing Application Circuit Parts List COMPONENT VALUE U1 - Ringing SLIC HC55171B 49 56.2k ZO IL1 R 49.9k RT1 R 1.5M RT2 R 51.1k RT3 R 45.3k RF All Intersil ...

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