HC5503
March 1999
File Number 4344.3
Low Cost 24V SLIC For PABX/Key
Systems
Description
• Wide Operating Battery Range (-21V to -44V)
• Single Additional +5V Supply
The Intersil HC5503 low cost SLIC is optimized for use in
small Analog or mixed Analog and Digital Key Telephone
Systems (KTS) or PBX products. The low component count
solution and surface mount package options, enable a small
desktop Key System/PBX product to be achieved. The
internal power dissipation of the end product is minimized by
the low power consumption and minimal power supply
voltage requirements of the HC5503.
• 25mA Short Loop Current Limit
• Ring Relay Driver
• Switch Hook and Ring Trip Detect
• Low On-Hook Power Consumption
• On-Hook Transmission
The HC5503 integrated solution provides higher quality,
higher reliability and better performance solution than a
transformer, thick film hybrid or discrete analog subscriber
interface design.
• ITU-T Longitudinal Balance Performance
• Loop Power Denial Function
• Thermal Protection
• Supports Tip, Ring or Balanced Ringing Schemes
• Low Profile SO and PLCC Surface Mount Packaging
• Pin Compatible with Industry Standard HC5504B SLIC
The HC5503 is designed in a Dielectrically isolated bipolar
technology and is inherently latch proof and does not require
hot plug or power supply sequencing precautions.
Applications
Ordering Information
TEMP.
PKG.
NO.
• Analog Subscriber Line Interfaces in Analog Key Systems
and Digital ISDN PABX Systems
o
PART NUMBER RANGE ( C)
PACKAGE
28 Ld PLCC
24 Ld SOIC
HC5503CM
HC5503CB
0 to 75
0 to 75
N28.45
M24.3
• Related Literature
- AN571, Using Ring Sync with HC-5502A and HC-5504
SLICs
Block Diagram
RING RELAY
DRIVER
4-WIRE
RD
TX
RX
INTERFACE
VF SIGNAL
PATH
RFS
RING TRIP
DETECTOR
C
2
TIP
TF
2-WIRE
LOOP CURRENT
DETECTOR
SHD
INTERFACE
RING
RF
RS
RC
LOGIC
INTERFACE
THERMAL LIMIT
PD
V
BAT
V
CC
BIAS
AGND
BGND
DGND
C
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
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