HC5503T
Data Sheet
June 1998
File Number 4506
Balanced PBX/Key System SLIC,
Subscriber Line Interface Circuit
The Intersil HC5503T is a low cost Subscriber Line Interface
Circuit (SLIC) that replaces the components of a discrete
Transformer Analog circuit design. The monolithic integrated
design provides improved performance and system reliability.
The HC5503T provides: Current limited DC feed to the
subscriber loop, maintains a flat 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, and limits system
power consumption on short loops.
The HC5503T provides balanced 2-wire transmission and
has excellent longitudinal balance, while providing 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 for loop current and operates over a range of
battery voltages (-24V to -58V).
Available in 22PDIP AND 24SO packaging. The HC5503T is
ideally suited as a replacement for discrete line circuits in
low cost analog PABXs, small Of鏗乧e/Home Of鏗乧e products
or Small Key Systems.
Features
鈥?Monolithic Integrated Device
鈥?Controlled Supply of Battery Feed Current for Short Loops
(30mA)
鈥?Single +5V Supply
鈥?Allows Interfacing With All Ringing Systems
鈥?Switch Hook Detection
鈥?Compatible With Worldwide PBX Performance
Requirements
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
Adapters (TA)
鈥?CTI (Computer Telephony Integration) Products
Ordering Information
PART NUMBER
HC5503TCP
HC5503TCB
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
RF
LOOP FEED
SPEECH CIRCUIT
TX
RX
V
BAT
LOOP DETECTOR
SHD
BIAS
RS
V
CC
AGND
DGND
50
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
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