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^{October 22, 2025 — With the increasing demands for data transmission reliability in industrial IoT and telecommunication systems, high-performance single-chip modems are becoming core components of critical communication interfaces. The widely adopted industry-standard CMX469AE2-TR1K full-duplex FSK modem, with its exceptional noise immunity and low-power characteristics, provides reliable serial communication solutions for industrial telemetry, remote monitoring, and wireless data acquisition systems.}

^{I. Chip Introduction}

^{The CMX469AE2-TR1K is a complete single-chip FSK modem integrated circuit in a compact SSOP-24 package. This device combines both transmit and receive functions, supports full-duplex communication, and operates at frequency rates from 300bps to 1200bps, making it particularly suitable for long-distance data transmission in harsh industrial environments.}

^{Core Features and Advantages:}

^{Wide operating voltage range: Single supply from 3V to 5.5V}

^{Low-power design: Standby current below 1μA}

^{High noise immunity: Built-in digital filters and automatic equalizer}

^{Full integration: Combines transmit filter, receive filter, and carrier detect circuit}

^{Industrial temperature range: -40℃ to +85℃}

^{Typical Application Fields:}

^{Industrial telemetry and data acquisition systems}

^{Power line carrier communication equipment}

^{Wireless data transmission modules}

^{Remote monitoring and control systems}

^{II. Full-Duplex FSK/MSK Modem Functional Analysis}

^{Core Architecture Overview
The CMX469AE2-TR1K adopts a highly integrated mixed-signal architecture, fully incorporating three major systems - transmit path, receive path, and clock management - delivering genuine full-duplex FSK/MSK modem functionality.}