Analog Devices Inc./Maxim Integrated 73M1916-IVTR/F

Overview

73M1916-IVTR/F from Teridian Semiconductor is a line-side Data Access Arrangement (DAA) IC for VoIP FXO interfaces, implementing patented MicroDAA™ technology with digital isolation barrier, 8/16 kHz PCM highway interface, ITU-T G.711 µ-law/A-law codec support, and ±6 dB analog gain control in VoIP gateways and POTS termination equipment.

For engineers reviewing the 73M1916-IVTR/F datasheet, 73M1916-IVTR/F pinout, 73M1916-IVTR/F application, or 73M1916-IVTR/F equivalent, key selection considerations include line-side isolation compliance (6 kV), programmable DC/AC termination per ETSI ES 203 021-2, SPI daisy-chain control up to 16 devices, and integrated call progress monitoring with ring/polarity reversal detection.

Technical Context

The 73M1916-IVTR/F operates exclusively as the line-side device in the 73M1966B dual-chip DAA system, receiving isolated power and data across a small pulse transformer barrier from the host-side 73M1906B. It implements full analog line interface functions including DC termination, AC impedance matching, trans-hybrid cancellation, and billing tone notch filtering.

It supports configurable international line standards via register-controlled DCIV settings and ACZ filter coefficients, delivers THD of –80 dB, and integrates detectors for over-voltage, under-voltage, over-current, and AC overload - all operating within –40 °C to +85 °C industrial temperature range.

Key Specifications

Pinout & Package

73M1916-IVTR/F is available in a 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Table 4 of DS_1x66B_001 Rev. 1.6.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar line-side DAA applications.

Compared with Si3217x and SLIC371, the 73M1916-IVTR/F delivers certified line-side functionality within a modular two-chip architecture that simplifies EMI management, enables scalable multi-port designs via SPI daisy chain, and embeds regulatory-compliant detection features without external components.

Availability

73M1916-IVTR/F is available at Aetrix Electronics and suitable for VoIP gateways, PSTN backup systems, and enterprise PBX equipment requiring stable component supply, long-lifecycle support, and globally certified DAA performance.

Supply support for 73M1916-IVTR/F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Teridian Semiconductor was a fabless analog/mixed-signal IC designer acquired by Maxim Integrated in 2010, specializing in highly integrated communications interface solutions.

The 73M1916-IVTR/F belongs to the MicroDAA™ family, engineered specifically for cost-effective, globally compliant FXO line interface in VoIP infrastructure-emphasizing safety isolation, regulatory adaptability, and minimal external component count.

FAQ

What is the role of 73M1916-IVTR/F in the 73M1966B DAA system?

The 73M1916-IVTR/F functions exclusively as the line-side device in the 73M1966B dual-chip DAA architecture. It receives isolated power and data from the host-side 73M1906B via a pulse transformer barrier, performs analog line interface tasks-including DC/AC termination, trans-hybrid cancellation, and call progress monitoring-and communicates configuration and status back via SPI. The 73M1916-IVTR/F cannot operate independently of the 73M1906B.

Does 73M1916-IVTR/F support both µ-law and A-law companding?

No-the 73M1916-IVTR/F itself does not perform µ-law or A-law companding. That function resides in the companion 73M1906B host-side device, which includes the ITU-T G.711 compliant codec. The 73M1916-IVTR/F handles analog line signaling and conditioning only; PCM data exchanged between the two devices is in linear format.

What package type and dimensions does 73M1916-IVTR/F use?

The 73M1916-IVTR/F is packaged in a 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch) with an exposed thermal pad. This package matches the mechanical and thermal specifications documented in Figure 48 and Table 4 of DS_1x66B_001 Rev. 1.6, and is RoHS compliant (6/6 lead-free).

Can 73M1916-IVTR/F be used without the 73M1906B host-side device?

No-73M1916-IVTR/F is not a standalone device. It relies entirely on the 73M1906B for digital control, PCM interface timing, codec processing, and barrier power transfer. Attempting to operate the 73M1916-IVTR/F without the 73M1906B will result in non-functional analog line interface and undefined behavior.

Which regulatory standards does 73M1916-IVTR/F help satisfy?

The 73M1916-IVTR/F contributes directly to meeting FCC Part 68 (USA), ETSI ES 203 021-2 (Europe), JATE (Japan), and other PTT homologation requirements through its integrated 6 kV isolation barrier, programmable DC/AC line termination, billing tone notch filter, and fail-safe fault detection-validated per test procedures in the 73M1866B/73M1966B datasheet.