73M1822-IMR/F

Overview

The 73M1822 is a single-package silicon Data Access Arrangement (DAA) designed for data, fax modem, and voice applications. It provides a serial Modem Analog Front End (MAFE) interface to DSPs or host processors for soft modem implementation. The device integrates all codec and DAA functions required for reliable PSTN connection globally. It supports Caller ID Type I and II, ring detection, polarity reversal detection, hook switch control, pulse dialing, loop current regulation, and configurable line impedance matching. The MicroDAA technology incorporates billing tone filters, an external clock reference, and audio monitor output.

Feature Summary

• Integrates complete codec and DAA functions within a single package for global PSTN compliance
• Supports MAFE serial interface with Master, Slave, and Daisy Chaining configurations
• Includes on-chip detectors for over-voltage, over-current, under-voltage, and overload conditions
• Features configurable sample rates ranging from 7.2 kHz to 16 kHz

Applications

• V.92 modems
• Satellite Set Top Boxes
• Fax/Multifunction Peripherals (MFP)
• Point of Sale Terminals
• Voicemail Systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Confirm component availability status as distribution channels may vary. Ensure compatibility with existing system designs by reviewing the latest revision history and electrical specifications before procurement.

Selection Notes

Select this component when a single-chip solution for DAA and codec functions is required to minimize PCB area. Evaluate the isolation requirements; the 73M1822 offers 4-5 kV isolation compared to the 6 kV provided by the two-chip 73M1922 configuration. Consider the available pinout options and serial interface timing constraints during system architecture planning.

Part Context

The 73M1822 belongs to the MicroDAA family, which simplifies system integration for telecom interfaces. It serves as a monolithic alternative to discrete DAA solutions, reducing component count and design complexity. The device is part of a broader portfolio that includes the two-chip 73M1922 variant for applications requiring higher isolation barriers.

Replacement Considerations

The 73M1922 is a related two-chip configuration consisting of the 73M1902 Host-Side Device and the 73M1912 Line-Side Device. This alternative provides 6 kV isolation compared to the 4-5 kV of the 73M1822.