MX604TN-TR1K

Overview

The MX604TN-TR1K is a full-duplex V.23 compatible modem interface integrated circuit manufactured by CML Microcircuits. It operates at data rates of 1200 bps and 75 bps, featuring an optional 75 bps back channel for bidirectional communication on the lower speed. The device incorporates date retiming capabilities to ensure signal integrity over noisy telecommunication lines. Designed for surface-mount assembly, it is housed in a TSSOP-24 package. This specific suffix variant indicates tube packaging rather than tape and reel, distinguishing its physical handling requirements from other distribution formats within the FX/MX604 series.

Feature Summary

• Supports full-duplex V.23 standard operation with simultaneous 1200 bps forward and 75 bps reverse channels
• Integrates date retiming functionality to recover clock signals from asynchronous incoming data streams
• Provides flexible power supply options compatible with both 3.3V and 5V logic levels

Applications

• Telephony modems requiring V.23 compliance
• Telemetry systems utilizing low-speed back channels
• Industrial control interfaces operating over analog telephone lines

Procurement Notes

Verify the MX604TN-TR1K designation carefully against official CML Micro documentation. The TR1K suffix typically denotes a specific packaging configuration, often associated with tube quantities, which may differ from standard tape-and-reel expectations. Confirm the exact package type and quantity per carrier directly with the manufacturer or authorized distributors to ensure compatibility with automated assembly equipment. Cross-reference the datasheet revision to confirm pinout consistency.

Selection Notes

Select this component when a robust, standalone V.23 modem solution is required without external DSP processing. The MX604TN integrates necessary filtering and timing recovery, reducing bill-of-materials complexity. Ensure the application environment supports the specified operating temperature range and that the available voltage rails match the device's input requirements. Consider the TSSOP-24 footprint constraints during PCB layout design.

Part Context

The MX604TN belongs to the FX/MX604 family of telecom interface ICs designed for reliable voice-band data transmission. These devices are engineered to replace older discrete modem solutions, offering higher integration and lower power consumption. The MX604 variant specifically targets applications needing full-duplex capability with distinct forward and backward data paths, serving as a critical link between digital controllers and analog telephone networks.

Replacement Considerations

Direct replacements include the MX604DW (SOIC-24) and MX604N (DIP-24), provided the mechanical footprint is adapted. Verify electrical compatibility regarding supply voltage and data rates. No active cross-model substitutes exist within the same package; redesign is required for different form factors.