HC5520 查看數據表（PDF） - Intersil
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HC5520 Datasheet PDF : 20 Pages
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SEMICONDUCTOR
HC5520
April 1997
CO/PABX Polarity Reversal
Subscriber Line Interface Circuit
Features
• Normal and Reversed DC Feed
• Current Limited Loop Feed
• Ringing, Test-In, and Test-Out Relay Drivers
• Thermal Shutdown Protection with Alert Signal
• On-Hook Transmission
• Selectable Transmit and Receive Gain Setting
• Selectable 2-Wire Impedance Matching
• Zero Crossing Ring Trip Detection and Ring Relay
Release
• Parallel Digital Control and Status Monitoring
• Protection Resistors Inside Feedback Loop Allows the
Use of PTC Devices Without Impact on Longitudinal
Balance
• Thermal Management Features
Applications
• CO/PABX Line Circuits
Description
The HC5520 is a Monolithic Subscriber Line Interface Circuit
(SLIC) for Analog Subscriber Line cards in Central Office
and PABX switches.
The HC5520 provides a comprehensive set of features for
these applications including loop reversal, zero crossing
ringing relay operation, long loop drive and a mutually inde-
pendent setting of the receive and transmit gains, and the
two wire impedance synthesis. Advanced power manage-
ment features combined with a small 44 lead MQFP pack-
age allow significant board space to be freed up for
additional line circuits.
The HC5520 is fabricated in a Harris state-of-the-art Bonded
Wafer High Voltage process, providing freedom from tradi-
tional JI latch-up phenomena without the use of additional
power supply filtering components or substrate tie connec-
tions. The very low parasitics and leakages associated with
this process provide an exceptionally flat performance over
frequency and temperature.
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
HC5520CQ
0 to 70 44 Ld MQFP
HC5520CM
0 to 70 44 Ld PLCC
PKG. NO.
Q44.10x10
N44.65
Block Diagram
TA
TB
TSDO
SHDO
PRI
PDI
RCI
TBI
TAI
AGND
BGND
RGND
VBAT
VCC
VEE
TEST CONTROL
LOGIC
RX
TX TX4W RN KZO
HC5520
4-WIRE INTERFACE / Z0
2-WIRE
INTERFACE
BIAS
BATTERY
REFERENCE
CP RDC CDC
RING
CONTROL
POWER
MANAGEMENT
TIP
TIPSEN
RINGSEN
RING
RD
RBH
RBL
CRTD
RPSB
RPSR
RPST
RPSG
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1997
1
File Number 4148.2
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