CMX7364Q1

Overview

The CMX7364Q1 is a half-duplex multi-mode wireless data modem manufactured by CML Micro. It operates on a single 3.3V supply and utilizes Function Image technology to support GMSK/GFSK, 2/4/8/16-FSK, and 4/16/32/64-QAM modulations. The device accommodates channel spacings from 6.25kHz to 50kHz with symbol rates up to 40ksymbols/s. It features a C-BUS serial interface for host communication, integrated synthesised clock generators, and auxiliary ADC/DAC subsystems. The component is housed in a compact 64-pin VQFN package.

Feature Summary

• Supports multiple modulation schemes including GMSK/GFSK, FSK, and QAM via programmable Function Images
• Features adaptive coded modulation (ACM) allowing dynamic over-the-air changes to modulation formats
• Includes high-performance digital IF filters reconfigurable for various RF channel spacings
• Integrates auxiliary functions such as four 10-bit DACs, four 10-bit ADCs, and GPIO pins

Applications

• High performance narrowband data radio telemetry and SCADA systems
• Digital software defined radio (SDR) implementations
• Mobile data transmission over fading channels

Procurement Notes

Verify the specific Function Image suffix required for the target modulation mode during procurement. Confirm that the ordering part number matches the desired FI version, as this determines the supported protocols. Ensure compatibility with existing host controller interfaces before finalizing orders.

Selection Notes

Select the appropriate Function Image variant based on the required modulation type and channel spacing. Consider the ACM capabilities if dynamic rate adaptation is necessary. Evaluate the auxiliary I/O requirements against the integrated ADC and DAC resources to minimize external component count.

Part Context

The CMX7364 belongs to CML Micro's multi-mode modem family, designed for flexible wireless data applications. It replaces discrete modem solutions by integrating baseband processing and analogue interfaces into a single chip. The device supports field upgrades through Function Image updates, ensuring long-term adaptability.

Replacement Considerations

Direct replacements depend on the specific Function Image configuration. Compatible alternatives within the same product line include variants supporting similar modulation sets. Verify pinout and register compatibility when substituting.