SI32177-B-GM1R

Telecom Overview

The Si32177-B-GM1R is a single-channel ProSLIC integrated circuit designed as a complete foreign exchange station (FXS) telephony interface solution. It complies with LSSGR, ITU, and ETSI specifications for short to medium loops. The device operates from a 3.3 V supply voltage ranging between 3.13 V and 3.47 V. It supports a maximum battery voltage of -135 V and accommodates loop resistances up to 2000 Ω. The component features wideband voice support, DTMF detection, and pulse metering capabilities. It utilizes a 42-pin QFN package measuring 5x7 mm and functions within an industrial temperature range of -40 °C to +85 °C.

Telecom Feature Summary

• Performs all BORSCHT functions including battery feed, overvoltage protection, ring generation, supervision, coding, hybrid connection, and test access.
• Integrates a tracking DC-DC controller that automatically generates optimal battery voltages for each line state.
• Supports global programmability and simplified configuration through the ProSLIC API.
• Features patented low-power ringing technology and wideband voice support.

Telecom Applications

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

Telecom Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm the exact voltage rating and temperature grade. Confirm RoHS compliance status and packaging details directly with authorized distributors or the manufacturer before procurement.

Telecom Selection Notes

Select this model for applications requiring a -135 V battery voltage capability and operation in temperatures down to -40 °C. Ensure the design supports the required 3.3 V supply and interfaces with standard PCM or SPI digital protocols.

Telecom Part Context

This component belongs to the Si3217x family of ProSLIC products. It is pin-compatible with other variants in the series, such as the Si32176 and Si32178, which offer different voltage ratings or additional FXO isolation options.

Telecom Replacement Considerations

Pin-compatible alternatives include the Si32176-B-GM1R for -110 V applications or the Si32178-B-GM1R if FXO support is required. Verify functional equivalence for specific loop resistance and voltage requirements.

Telecom FAQ

What is the maximum loop resistance supported by the Si32177-B-GM1R?

The device supports a maximum loop resistance of 2000 Ω when the loop current is 18 mA and the battery voltage is -48 V.

Does the Si32177-B-GM1R support FXO functionality?

No, the Si32177-B-GM1R is an FXS-only device. FXO support is available in the Si32178 variant.

What is the idle channel noise specification?

The idle channel noise is typically 8 dBrnC and has a maximum specification of 12 dBrnC, weighted using the C-message weighting.