73M1916-IVT/F

Overview

The 73M1916-IVT/F is a line-side Data Access Arrangement (DAA) component within the 73M1966B MicroDAA family, designed for Foreign-Exchange-Office (FXO) Voice-over-IP applications. It connects PCM formatted voice channels to the Public Switched Telephone Network (PSTN) via a two-wire twisted pair interface. The device operates on a 3.0 V to 3.6 V supply and supports an industrial temperature range of -40 °C to +85 °C. It features an SPI control interface with daisy-chain support for up to 16 devices and provides isolation up to 6 kV through a pulse transformer barrier. The unit includes ITU-T G.711 compliant codecs with selectable μ-law and A-law companding modes, alongside a 16-bit linear mode suitable for wideband codecs at 16 kHz sampling rates.

Feature Summary

• Integrated MicroDAA technology providing digital isolation barrier via pulse transformer for reliable operation in EMI environments
• Supports both slave and master PCM highway modes compatible with E-1 and T-1 standards
• Configurable analog gain adjustments with transmit and receive paths adjustable in 0.125 dB increments
• Comprehensive line sensing capabilities including ring detection, polarity reversal, and call progress monitoring

Applications

• VoIP equipment requiring PSTN connectivity for emergency service calling
• Computer telephony integration systems
• PBX systems and internet appliances
• Voicemail systems and POTS termination equipment

Procurement Notes

Verify the specific suffix 'IVT' against the manufacturer's official ordering guide to confirm package type and temperature grade. Ensure the host system design accommodates the required 3.0 V to 3.6 V operating voltage and utilizes a compatible pulse transformer for the isolation barrier. Confirm that the supplier provides documentation verifying RoHS compliance and adherence to global DAA standards such as FCC and ETSI.

Selection Notes

Select this component when designing FXO interfaces for VoIP systems requiring high reliability and low power consumption. The 73M1916 serves as the line-side counterpart to the 73M1906 host-side device. Consider the 32-pin QFN or 20-pin TSSOP package options based on board space constraints. Ensure the application requires the specific isolation characteristics and DAA functions provided by the MicroDAA architecture rather than discrete solutions.

Part Context

The 73M1916 is part of the 73M1x66B family developed by Teridian Semiconductor Corporation, which was later acquired by Analog Devices Inc./Maxim Integrated. This family represents a patented single-package silicon Data Access Arrangement solution. The 73M1916 specifically handles the line-side interface, while the 73M1906 manages the host-side digital processing and power delivery across the isolation barrier.

Replacement Considerations

The 73M1866B is a single-package alternative within the same family that integrates both host and line-side functions. Verify pin compatibility and functional equivalence before substitution. No other direct drop-in replacements are documented in the primary datasheet.