HC5503T
®
Data Sheet
J une 2004
FN4506.2
Balanced PBX/Key Sys tem SLIC,
Subs criber Line Interface Circuit
Features
• Monolithic Integrated Device
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.
• Controlled Supply of Battery Feed Current for Short Loops
(30mA)
• Single +5V Supply
• Allows Interfacing With All Ringing Systems
• Switch Hook Detection
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.
• Compatible With Worldwide PBX Performance
Requirements
• Low Power Consumption During Standby
• Pb-free Available
Applications
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.
• PBX Switches (Analog, Digital or ISDN)
• Key Telephone Systems (KTS)
• ISDN PC Plug in Modems
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).
• ISDN Small Office/Home Office (SOHO) Terminal
Adapters (TA)
• CTI (Computer Telephony Integration) Products
Available in 24SO packaging. The HC5503T is ideally suited
as a replacement for discrete line circuits in low cost analog
PABXs, small Office/Home Office products or Small Key
Systems.
Ordering Information
TEMP.
PKG.
DWG. #
PART NUMBER RANGE (°C)
PACKAGE
24 Ld SOIC
Block Diagram
HC5503TCB
0 to 75
0 to 75
0 to 75
M24.3
BGND
TIP RING
C1
HC5503TCBZ (Note)
24 Ld SOIC (Pb-free) M24.3
HC5503TCBZ96
(Note)
24 Ld SOIC
Tape & Reel (Pb-free)
M24.3
TX
RX
TF
RF
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
SPEECH CIRCUIT
LOOP FEED
V
BAT
LOOP DETECTOR
SHD
BIAS
RS
V
AGND
DGND
CC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Harris Corporation 1996, Copyright Intersil Americas Inc. 2003, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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