SI3018-KS

Telecom Overview

The Si3018 is a line-side component of the Silicon Laboratories Si3056 Direct Access Arrangement (DAA) system. It interfaces with the main Si3056 controller to manage telephone line connections. The device supports DC termination voltages ranging from 6.0V at 20mA to 9V at 120mA, and includes loop current monitoring capabilities up to 120mA. It operates with a ring detect voltage threshold between 13.5V and 23.65V RMS depending on configuration. The unit provides over 5000V isolation barrier protection and functions within an ambient temperature range of 0°C to 70°C for K-Grade devices.

Telecom Feature Summary

• Integrated direct access arrangement (DAA) line interface
• Proprietary high-voltage isolation technology
• Programmable DC and AC line termination
• Support for Type I and II caller ID detection

Telecom Applications

• V.92 modem implementations
• Voice mail systems
• Multi-function printers
• Set-top boxes
• Fax machines

Telecom Procurement Notes

Verify that the specific part number matches the required grade (e.g., K-Grade for commercial temperature ranges). Confirm package type availability, as the datasheet specifies 16-pin small outline packages. Ensure compatibility with the host Si3056 controller chip for proper serial interface operation.

Telecom Selection Notes

Select the Si3018 when designing global DAA solutions requiring integrated isolation without external transformers. Compare against the Si3019 if higher transmit/receive full-scale levels are needed. Verify that the application circuit utilizes the recommended decoupling capacitors and ferrite beads specified in the typical application schematic.

Telecom Part Context

The Si3018 functions as the line-side half of the Si3056 DAA chipset. It works in conjunction with the digital controller to replace traditional analog front ends, isolation transformers, and hybrids. This integration significantly reduces the bill of materials and board space required for compliant telephone interface designs.

Telecom Replacement Considerations

Public confirmed substitute part numbers: Si3019, Si3010.