The Silver Telecom ST003 is a highly integrated, 21-pin DIL Subscriber Line Interface Circuit (SLIC) engineered for space-constrained and harsh environments (-55°C to +85°C). Compliant with G712 standards for loop lengths up to 3.0km, it minimizes external component requirements by incorporating an onboard DC/DC converter and ringing generator to operate from a single power supply. Its direct codec compatibility and robust thermal tolerance make it an ideal, cost-effective solution for industrial, military, and low-line-count telecommunications applications, including VoIP, WLL, and SOHO networks.
Product Features
- 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
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Description
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 Telecoms 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 minimal 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).
For volume quotes for any of these models, contact your local distributor, details can be found here (below):

ST003 Evaluation Board
EvalAg117x is a suitable evaluation board for testing and use with the ST003. It can be used on its own or it can be connected to another EvalAg117x evaluation board or to an EvalAg2120 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.
Additional information
| Description | 3V – 600R |
|---|---|
| Mounting Type | Dual-in-Line (DIL) Through-Hole |
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Our Distributors
For volume quotes for any of these models, contact your local distributor.

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Designed and made in the UK for consistent high standards.

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Supplying trusted technology to over 70 countries worldwide.

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Engineered for durability with dependable customer delivery.

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