SI32280-A-GM

Telecom Overview

The Si32280-A-GM is a dual Foreign Exchange Station (FXS) telephony interface integrated circuit manufactured by Skyworks Solutions. It operates from a single 3.3 V supply and implements two complete FXS channels within an 8 x 8 mm 48-pin QFN package. The device supports standard ISI digital interfaces and includes built-in DC-DC converter controllers for battery voltage generation. Key electrical parameters include a maximum battery voltage of -106 V, an operating temperature range of -40 °C to +85 °C, and support for wideband audio with A-Law/µ-Law companding.

Telecom Feature Summary

• Performs all BORSCHT functions for two independent FXS lines
• Supports wideband voice transmission for superior audio quality
• Features adaptive ringing technology to reduce peak current consumption
• Includes programmable AC impedance and hybrid circuits

Telecom Applications

• VoIP gateways and routers
• xDSL Integrated Access Devices (IADs)
• Analog Terminal Adapters (ATA)
• Private Branch Exchange (PBX) systems

Telecom Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating. The 'GM' suffix indicates a lead-free RoHS-compliant component in a QFN482 package with an extended industrial temperature range. Confirm interface compatibility with the host system before procurement.

Telecom Selection Notes

Select this model when dual FXS capability is required without DTMF detection or Smart Ringing features. Compare against the Si32281 variant if DTMF detection is necessary, or the Si32284 variant if Smart Ringing functionality is desired. Ensure the host processor supports the ISI interface protocol.

Telecom Part Context

This component belongs to the Si3228x family of Dual ProSLIC devices. It shares the same core architecture as other members like the Si32281 and Si32284 but lacks specific feature sets such as DTMF detection or Smart Ringing found in higher-numbered variants.

Telecom Replacement Considerations

The Si32280-A-FM serves as the commercial temperature version of this part. For applications requiring DTMF detection, consider the Si32281-A-GM. If Smart Ringing is needed, the Si32284-A-GM is the appropriate alternative within the same package.

Telecom FAQ

Does the Si32280-A-GM support DTMF detection?

No, the Si32280-A-GM does not include DTMF detection capabilities. Models such as the Si32281-A-GM are designed to support this feature.

What digital interface does the Si32280-A-GM use?

It utilizes a 3-wire Integrated Serial Interface (ISI). It does not support the PCM interface found in the Si32282 series.

Is Smart Ringing supported on this device?

No, Smart Ringing is not available on the Si32280-A-GM. This feature is included in the Si32284-A-GM and subsequent models.