SI2434-D-GT

Overview

The SI2434-D-GT is a system-side ISOmodem component from Skyworks Solutions, designed as part of a chipset with the Si3018 line-side device. It supports data rates up to 33.6 kbps using ITU-T V.34 and Bell protocols. The device operates on a digital supply voltage (VD) ranging from 3.0 V to 3.6 V. It features UART, SPI, or parallel host interfaces and utilizes flexible clocking options including 32.768 kHz, 4.915 MHz, or 27 MHz inputs. Packaged in a 24-pin TSSOP, it integrates DAA technology for global telephone line interfacing.

Feature Summary

• Integrated direct access arrangement (DAA) providing capacitive isolation and globally compliant line interface
• Supports standard AT command sets with firmware upgradeability via EEPROM interface
• Includes Type I and II caller ID decode capabilities and DTMF detection/generation
• Eliminates external DSP, modem controller, codec, transformer, and hybrid components

Applications

• Set-top boxes
• Point-of-sale terminals
• Text and video telephones
• Digital video recorders
• Remote monitoring systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm compatibility with the designated line-side device, such as the Si3018, as the datasheet validity depends on specific chipset combinations. Ensure the revision level aligns with current manufacturing standards before finalizing procurement orders.

Selection Notes

Select this model when a maximum data rate of 33.6 kbps is sufficient, as higher speeds like 56 kbps require the Si2457 variant. Choose the 24-pin TSSOP package if additional GPIO or codec interface pins are needed compared to the 16-pin option. Verify that the application environment falls within the specified commercial or industrial temperature ranges.

Part Context

This component belongs to the ISOmodem family, which includes the Si2457, Si2415, and Si2404 system-side devices. These parts share similar architectural features but differ in supported data rates and protocol implementations. The SI2434 specifically targets applications requiring V.34 compliance without the need for V.90 support.

Replacement Considerations

Publicly confirmed substitutes include other variants within the same ISOmodem family, such as the SI2457-D-GT for higher speed requirements or the SI2415-D-GT for lower cost options. Ensure any replacement maintains the same 24-pin TSSOP footprint and compatible voltage specifications.