73M1822-IM/F

Overview

The 73M1822-IM/F 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, enabling globally compliant soft modem solutions. The device integrates all codec and DAA functions required for reliable PSTN connections worldwide. It supports V.92 modems with speeds up to 56 Kbps and configurable sample rates from 7.2 kHz to 16 kHz. Operating on a 3.3 V supply within an industrial temperature range of -40°C to +85°C, the component utilizes a small pulse transformer to achieve 4 kV to 5 kV isolation. It is housed in an 8x8 mm 42-pin QFN package.

Feature Summary

• Integrates complete codec and DAA functions for global PSTN compliance
• Supports MAFE serial interface with Master, Slave, and Daisy Chaining modes
• Includes billing tone reject filter and polarity reversal detection
• Features configurable line impedance matching and loop current regulation

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 official documentation to confirm package type and temperature grade. Confirm that the requested part number matches the exact manufacturer designation. Check for any product change notices or end-of-life announcements prior to procurement. Ensure compatibility with existing system designs regarding voltage levels and isolation requirements.

Selection Notes

Select this component when a single-chip solution for PSTN connectivity is required. It is suitable for designs needing integrated billing tone rejection and caller ID support. Consider the 73M1922 two-chip configuration if higher isolation ratings are necessary. Evaluate the available serial interface options to match the host processor capabilities.

Part Context

The 73M1822 belongs to the MicroDAA family of silicon DAAs. It serves as a compact alternative to discrete DAA implementations. The device simplifies system integration by combining analog front-end processing with digital control interfaces. It is designed to reduce PCB footprint while maintaining high performance standards for telecommunications equipment.

Replacement Considerations

Public confirmed substitute part numbers: None.