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| HC5503C Datasheet, PDF (1/5 Pages) Intersil Corporation – Unbalanced PBX/Key System SLIC, Subscriber Line Interface Circuit | |||
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Data Sheet
June 1998
HC5503C
File Number 4503
Unbalanced PBX/Key System SLIC,
Subscriber Line Interface Circuit
The Intersil HC5503C is a low cost Subscriber Line Interface
Circuit (SLIC), that replaces the components of an
unbalanced discrete Analog circuit design. The monolithic
integrated design provides improved performance and
system reliability.
The SLIC provides: current limited DC feed to the subscriber
loop, maintains a ï¬at frequency response over the voice
band and beyond, has self resetting thermal protection that
allows conversation to continue while the fault is present,
provides a TTL subscriber off-hook indication even in the
presence of longitudinal currents, provides unbalanced
2-wire transmission while maintaining an excellent
longitudinal balance and limits system power consumption
on short loops.
The HC5503C provides on-hook transmission and
longitudinal current rejection in both the on-hook or off-hook
conditions. The SLIC needs only one +5V supply in addition
to the main battery supply (-24V to -58V) for loop current.
Available in 22PDIP and 24SO packaging. The HC5503C is
ideally suited as a replacement for discrete line circuits in
low cost analog PABXâs, Small Ofï¬ce/Home Ofï¬ce products
or Small Key Systems.
Block Diagram
BGND
TF
VB(INT)
VBAT
LOOP FEED
Features
⢠Monolithic Integrated Device
⢠Single +5V Supply
⢠Controlled Supply of Battery Feed Current for Short Loops
(30mA)
⢠Allows Interfacing With All Ringing Systems
⢠Switch Hook Detection
⢠Low Power Consumption During Standby
Applications
⢠PBX Switches (Analog, Digital or ISDN)
⢠Key Telephone Systems (KTS)
⢠ISDN PC Plug in Modems
⢠ISDN Small Ofï¬ce / Home Ofï¬ce (SOHO) Terminal Adapt-
ers (TA)
⢠CTI (Computer Telephony Integration) Products
Ordering Information
PART NUMBER
HC5503CCP
HC5503CCB
TEMP.
RANGE (oC) PACKAGE
0 to 75 22 Ld PDIP
0 to 75 24 Ld SOIC
PKG. NO.
E22.4
M24.3
TIP RING
C1
TX
SPEECH CIRCUIT
RX
LOOP DETECTOR
BIAS
RS
VCC
AGND DGND
SHD
49
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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