HC5503T
Balanced PBX / Key System SLIC, Subscriber Line Interface Circuit
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
Description
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.
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
