Harris Semiconductor HC5521CQ, HC5521CM, HC5521 Datasheet
SEMICONDUCTOR
HC5521
ADVANCE INFORMATION
January 1997
Features
• Normal and Reversed DC Feed
• 30mA Current Limit
• Ringing, Test-In, and Test-Out Relay Drivers
• Ground Key Detector with Seperate Logic Output
• 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
SLIC
Subscriber Line Interface Circuit
Description
The HC5521 is a Monolithic Subscriber Line Interface Circuit
(SLIC) for Analog Subscriber Line cards in Central Office
and PABX switches.
The HC5521 provides a comprehensive set of features for
these applications including loop reversal, ground key detection, zero crossing ring relay operation, long loop drive and a
mutually independent setting of the receive and transmit
gains, and the two-wire impedance synthesis. An option is
also provided for eliminating transhybrid balance on-chip.
Advanced power management features combined with a
small 44 lead MQFP package allow significant board space
to be freed up for additional line circuits.
The HC5521 is fabricated in a Harris state of the art Bonded
Wafer High Voltage process, providing freedom from traditional JI latch-up phenomena without the use of additional
power supply filtering components or substrate tie connections. The very low parasitics and leakages associated with
this process provide an exceptionally flat performance over
frequency and temperature.
Applications
• PABX/CO Line Circuits
Block Diagram
TA
TB
GKDO
SHDO
D2PRI
D3PDI
D4RCI
D5TBI
D6TAI
AGND
BGND
RGND
V
BAT
V
CC
V
EE
TEST CONTROL
LOGIC
BIAS
BATTERY
REFERENCE
Ordering Information
TEMP.
PART NUMBER
HC5521CQ 0 to 70 44 Ld MQFP Q44.10x10
HC5521CM 0 to 70 44 Ld PLCC N44.65
RX RNTX TX4W
4-WIRE INTERFACE / Z
MANAGEMENT
RANGE (oC) PACKAGE PKG. NO.
KZO
0
TIP
2-WIRE
INTERFACE
RING
CONTROL
POWER
TIPSEN
RINGSEN
RING
RD
RBH
RBL
CRTD
RPSB
RPSR
RPST
RPSG
RDC
CDC
4-35
CP
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© Harris Corporation 1997
File Number 4265
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