HC5517 Datasheet, PDF (1/18 Pages) Intersil Corporation – 3 REN Ringing SLIC For ISDN Modem/TA and WLL

Data Sheet
HC5517
July 1998 File Number 4147.2
3 REN Ringing SLIC For ISDN Modem/TA
and WLL
he 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.
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.
A thermal shutdown with an alarm output and line fault
protection are also included for operation in harsh
environments.
Ordering Information
PART
NUMBER
HC5517IM
HC5517CM
HC5517IB
HC5517CB
TEMP. RANGE
(^oC)
PACKAGE
-40 to 85 28 Ld PLCC
0 to 75 28 Ld PLCC
-40 to 85 28 SOIC
0 to 75 28 SOIC
PKG. NO.
N28.45
N28.45
M28.3
M28.3
Features
• Thru-SLIC Open Circuit Ringing Voltage up to
77V_PEAK/54V_RMS, 3 REN Capability at 44V_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
• 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
- AN9608, Implementing Pulse Metering
- AN9636, Implementing an Analog Port for ISDN Using
the HC5517
- AN549, The HC-5502S/4X Telephone Subscriber Line
Interface Circuits (SLIC)
Block Diagram
TIP FEED
TIP SENSE
RING FEED
RING SENSE 1
RING SENSE 2
V_REF
RTI
V_BAT
V_CC
AGND
BGND
2-WIRE
INTERFACE
LOOP CURRENT
DETECTOR
FAULT
DETECTOR
BIAS
CURRENT
LIMIT
RING TRIP
DETECTOR
IIL LOGIC INTERFACE
F1 F0 RS TST
4-WIRE
INTERFACE
+-
RELAY
DRIVER
RDI
V_RX
V_TX
V_RING
- IN 1
OUT 1
SHD
ALM
I_LMT
RTD
RDO
60
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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