73M1916-IM/F

Overview

The 73M1916 is a line-side Data Access Arrangement (DAA) component within the Teridian 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 both 8-kHz and 16-kHz sampling rates with ITU-T G.711 compliant codecs in selectable μ-law and A-law modes. It features an SPI control interface supporting daisy-chain configurations for up to 16 devices. Key electrical specifications include isolation up to 6 kV, transmit/receive gains adjustable in 0.125 dB increments, and Total Harmonic Distortion of -80 dB.

Feature Summary

• Patented digital isolation barrier using a pulse transformer to transfer power and data across the PSTN line-side interface.
• Integrated DAA functions including call progress monitoring, Caller ID Type I and II detection, ring detection, and polarity reversal.
• Configurable DC and AC termination networks to meet global regulatory standards such as FCC, ETSI, and JATE.
• Supports master and slave PCM highway interfaces with automatic clock rate detection.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with the host-side 73M1906B controller if utilizing the split architecture. Confirm RoHS compliance status for the specific revision being procured.

Selection Notes

Select this component when designing FXO interfaces for VoIP gateways that require certified DAA functionality in a compact form factor. Consider the 73M1916 paired with the 73M1906B for systems needing high reliability and low component count. Evaluate the need for 16-bit linear mode or wideband codec interfacing if higher audio fidelity is required over standard telephony bandwidth.

Part Context

The 73M1916 serves as the line-side counterpart to the 73M1906B host-side device within the 73M1x66B family. This split architecture utilizes a small pulse transformer for galvanic isolation, replacing traditional bulky isolation components. The system allows for simplified worldwide homologation by integrating necessary protection and termination circuits directly into the silicon.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. Designers should consult the manufacturer for current lifecycle status and recommended alternatives if discontinuation occurs.