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

Overview

73M1916-IM/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, ±6 dB analog transmit gain, +3 dB analog receive gain, and ITU-T G.711 µ-law/A-law codec support. It operates at 3.3 V, supports 8 kHz/16 kHz sampling, and enables PSTN connectivity in emergency calling and redundancy systems.

For engineers reviewing the 73M1916-IM/F datasheet, 73M1916-IM/F pinout, 73M1916-IM/F application, or 73M1916-IM/F equivalent, key selection criteria 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 polarity reversal detection.

Technical Context

The 73M1916-IM/F functions exclusively as the line-side component of the 73M1966B dual-device DAA system, receiving isolated power and control signals from the host-side 73M1906B via a pulse transformer barrier. It implements full analog line interface functions including DC termination, AC impedance matching, trans-hybrid cancellation, and billing tone rejection.

It supports configurable international line standards through 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 across –40 °C to +85 °C industrial temperature range.

Key Specifications

Pinout & Package

73M1916-IM/F is available in a 20-pin TSSOP package (5.0 mm × 6.5 mm, 0.65 mm pitch) with exposed thermal pad. Pin assignments are validated per DS_1x66B_001 Figure 3 and Table 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si3217x and MAX1389, the 73M1916-IM/F provides certified 6 kV isolation, hardware-accelerated call progress monitoring, and seamless SPI daisy-chain scalability - making it uniquely suited for carrier-class emergency calling and maintenance terminals requiring global homologation.

Availability

73M1916-IM/F is available at Aetrix Electronics and suitable for VoIP emergency gateways, PBX line cards, and field maintenance terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployment.

Supply support for 73M1916-IM/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 company specializing in highly integrated communications interface solutions, later acquired by Maxim Integrated (now part of Analog Devices).

The 73M1916-IM/F belongs to the MicroDAA™ family designed specifically for cost-effective, globally compliant FXO line interface in VoIP infrastructure - emphasizing isolation robustness, regulatory feature integration, and minimal external component count.

FAQ

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

The 73M1916-IM/F serves exclusively as the line-side device in the 73M1966B dual-chip DAA architecture. It receives isolated power and control commands from the host-side 73M1906B via a pulse transformer barrier, and performs all analog line interface functions - including DC/AC termination, trans-hybrid cancellation, and line supervision - without requiring local digital processing resources. The 73M1916-IM/F cannot operate autonomously.

Does the 73M1916-IM/F support standalone operation without the 73M1906B?

No, the 73M1916-IM/F does not support standalone operation. It relies entirely on the 73M1906B for clock generation, SPI command issuance, PCM data routing, and barrier synchronization. All configuration registers, gain controls, and operational modes are written by the 73M1906B. The 73M1916-IM/F contains no internal oscillator or boot ROM and has no independent control interface.

What isolation certification level does the 73M1916-IM/F achieve?

The 73M1916-IM/F achieves 6 kV reinforced isolation when used with a certified pulse transformer (e.g., Pulse Engineering PA0266NL or equivalent per Table 29 in DS_1x66B_001). This isolation rating satisfies FCC Part 68, ETSI ES 203 021-2, and JATE requirements for direct PSTN connection. The isolation barrier is implemented externally - the 73M1916-IM/F itself provides the line-side analog circuitry powered across that barrier.

Which international line standards does the 73M1916-IM/F support out-of-the-box?

The 73M1916-IM/F supports ETSI ES 203 021-2, FCC Part 68, and JATE through programmable DCIV and ACZ register settings documented in Section 10.7 of the datasheet. Predefined configurations cover North America, Western Europe, Japan, Australia, and Brazil - enabling one hardware design to meet multiple regional homologation requirements via firmware configuration rather than board-level changes.

Can the 73M1916-IM/F operate at 16 kHz sampling rate for wideband voice?

Yes, the 73M1916-IM/F supports 16 kHz sampling in conjunction with the 73M1906B host device. When configured for 16 kHz mode, it maintains full G.711 µ-law/A-law companding compatibility and preserves all analog gain, detector, and call progress monitoring functionality. The 16-bit linear mode remains available, allowing direct interfacing with wideband codecs without companding loss.