SI32177-B-GM1

Telecom Overview

The SI32177-B-GM1 is a single-channel ProSLIC integrated circuit implementing a complete foreign exchange station (FXS) telephony interface. It operates from a 3.3 V supply with a voltage range of 3.13 V to 3.47 V and supports battery voltages up to -135 V. The device features a 42-pin QFN package and functions within an ambient temperature range of -40 °C to +85 °C. It includes a tracking DC-DC controller, wideband voice support, DTMF detection, and pulse metering capabilities.

Telecom Feature Summary

• Performs all BORSCHT functions for telephony line interfacing
• Integrates a tracking DC-DC controller for optimal battery voltage generation
• Supports wideband voice transmission and DTMF detection
• Enables seamless connection to FXO devices via patented capacitive isolation technology

Telecom Applications

• Customer Premise Equipment (CPE)
• VoIP DSL Gateways and Routers
• Wireless Local Loop (WLL)
• Integrated Access Devices (IAD)

Telecom Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm the exact electrical ratings and temperature grade. Confirm that the component meets RoHS compliance requirements for your target market. Ensure the procurement channel provides valid traceability for this discontinued or legacy part number.

Telecom Selection Notes

Select the SI32177-B-GM1 when a maximum battery voltage of -135 V is required for ringing applications. This G-grade variant is suitable for industrial environments requiring operation down to -40 °C. Verify compatibility with standard PCM or SPI digital interfaces before finalizing the design.

Telecom Part Context

This component belongs to the Si3217x family of ProSLIC products. These are pin-compatible single-channel solutions designed to implement FXS interfaces in accordance with LSSGR, ITU, and ETSI specifications. The series integrates CODEC, SLIC, and line diagnostics into a compact form factor.

Telecom Replacement Considerations

Direct replacements include other parts within the Si3217x family, such as the SI32176-B-GM1 or SI32178-B-GM1. Selection depends on matching the required battery voltage rating (-110 V vs -135 V) and specific feature sets like FXO support.