Designed for use in challenging environments, the Silver Telecom ST003 is a single Subscriber Line Interface Circuit (SLIC) in a 21 pin dual in line (DIL) format. The combination of features and packaging offers extremely efficient use of board area, saving significant system size and cost, minimising time to market for Telephony Systems developers.

The ST003 has been designed to work with loop lengths of typically 3.0km. Its performance to regulatory standards (G712) allows use in public and private network applications.  With operation over an extended temperature range of -55C to +85C, ST003 is suitable for use in Industrial and military telecom applications.

The ST003 has integral dc/dc converter and ringing generation thus providing all the line powering requirements from a single supply. The SLIC requires a minimum of external components.

The system interface has been designed for direct connection to popular codecs, for both audio and signalling.

The ST003 is ideal for low line count, short loop length applications, such as ISDN Terminal Adaptors, Internet Telephony (VoIP), Computer Telephony Integration (CTI), Wireless Local Loops (WLL) and Small Office Home Office (SOHO).

Key Features & Documents

wide temperature range -55C to +85C

600R impedance

Very small DIL package

Very Simple integration

On-board ringing generator

Integral high efficiency DC/DC converter, providing: Ringing voltage and Loop current

Single supply voltage (3.3v)

Tip/Ring polarity reversal

Simplified protection


Part Number




Volume Pricing


3V – 600R


Evaluation Boards

Evaluation Board Ag117x

This evaluation board Ag117X is suitable for use with the ST003. It can be used on its own or it can be connected to another Ag117x evaluation board or to an Ag2120 evaluation board.

NOTE : Evaluation Boards are supplied pre-loaded with a sample module. Please ensure that you specify which variant you wish populated into the Eval board on request or ideally on your PO.

Please contact you local distributor or Silvertel to request an evaluation board.