HC5503C
Data Sheet
June 1998
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 鏗俛t 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 PABX鈥檚, Small Of鏗乧e/Home Of鏗乧e products
or Small Key Systems.
Features
鈥?Monolithic Integrated Device
鈥?Single +5V Supply
鈥?Controlled Supply of Battery Feed Current for Short Loops
(30mA)
鈥?Allows Interfacing With All Ringing Systems
鈥?Switch Hook Detection
鈥?Low Power Consumption During Standby
Applications
鈥?PBX Switches (Analog, Digital or ISDN)
鈥?Key Telephone Systems (KTS)
鈥?ISDN PC Plug in Modems
鈥?ISDN Small Of鏗乧e / Home Of鏗乧e (SOHO) Terminal Adapt-
ers (TA)
鈥?CTI (Computer Telephony Integration) Products
Ordering Information
PART NUMBER
HC5503CCP
HC5503CCB
TEMP.
RANGE (
o
C)
0 to 75
0 to 75
PACKAGE
22 Ld PDIP
24 Ld SOIC
PKG. NO.
E22.4
M24.3
Block Diagram
BGND
TIP
RING
C1
TF
VB(INT)
TX
LOOP FEED
SPEECH CIRCUIT
RX
V
BAT
LOOP DETECTOR
SHD
BIAS
RS
VCC
AGND
DGND
49
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright 漏 Intersil Corporation 1999
INTERSIL
1
2
3
4
5
