HC5503T: 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 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.

Key Features
  • Monolithic Integrated Device
  • Controlled Supply of Battery Feed Current for Short Loops (30mA)
  • Single +5V Supply
  • Allows Interfacing With All Ringing Systems
  • Switch Hook Detection
  • Compatible With Worldwide PBX Performance Requirements
  • Low Power Consumption During Standby
  • Pb-free Available
Applications
  • PBX Switches (Analog, Digital or ISDN)
  • Key Telephone Systems (KTS)
  • ISDN PC Plug in Modems
  • ISDN Small Office/Home Office (SOHO) Terminal Adapters (TA)
  • CTI (Computer Telephony Integration) Products
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN9813: Operation of the HC5503C, HC5503T Family of SLICs Evaluation Board (HC5503XEVAL1)PDF12 Dec 2014122 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
HC5503T DatasheetPDF16 Jul 2015217 KB
User Guides
TitleTypeUpdatedSizeOther Languages
HC5503EVAL User GuidePDF13 Nov 2014136 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
HC5503TCB24 Ld SOIC0.64241240
HC5503TCB9624 Ld SOIC T+R0.64241240
HC5503TCBZ24 Ld SOIC0.64243260RoHS
HC5503TCBZ9624 Ld SOIC T+R0.64243260RoHS
HC5503T Datasheet 16 Jul 2015
24 Ld SOIC T+R HIP6018B
HC5503T
AN9813: Operation of the HC5503C, HC5503T Family of SLICs Evaluation Board (HC5503XEVAL1) 12 Dec 2014
HC5503EVAL User Guide 13 Nov 2014