MX614DW

Overview

The MX614DW is a low voltage, low power CMOS integrated circuit designed for the reception or transmission of asynchronous 1200bps data. It is compatible with Bell 202 type systems and supports data rates up to 1818bps. The device operates from a supply voltage range of 3.0V to 5.5V. It features an optional 1200bps data retiming facility that can eliminate the need for an external UART in associated microcontrollers. Additionally, it supports 5bps and 150bps back channel operation and includes an optional line equalizer controlled by an external logic level.

Feature Summary

• Supports half duplex Bell 202 compatible modem operations at 1200bps
• Includes optional Tx and Rx data retiming functions to interface directly with microcontrollers
• Features a switchable receive filter equalizer to attenuate out-of-band noise and interfering signals
• Provides a very low current Zero-Power Mode for battery-powered applications

Applications

• Telephone telemetry systems
• Portable terminal devices requiring low power consumption
• Line powered communication equipment

Procurement Notes

Verify the package type matches the required application, as the MX614 series includes TSSOP, SOIC, and PDIP variants. Confirm the specific ordering suffix corresponds to the desired physical footprint. Ensure the design accounts for the mandatory 3.579545MHz crystal frequency for correct FSK operation. Check for any manufacturer updates regarding component availability or specification changes.

Selection Notes

Select this component when designing Bell 202 compliant asynchronous data links. The MX614DW specifically suits designs requiring a 16-pin surface mount package. Consider the optional data retiming feature if minimizing microcontroller software overhead is a priority. Evaluate the power requirements against the typical 1mA operating current at 3.3V to ensure compatibility with portable system constraints.

Part Context

The MX614 is part of a family of low voltage, low power CMOS integrated circuits manufactured by MX-COM, Inc. The series includes variants such as the MX614TN in a 24-pin TSSOP package and the MX614P in a 16-pin PDIP package. All variants share the same core functionality but differ in physical packaging to accommodate different board layout requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.