CMX7143L4

Overview

The CMX7143L4 is a multi-mode wireless data modem from CML Microcircuits, designed for half-duplex applications with carrier sense capabilities. It operates on a single 3.3V supply and features automatic frame sync detection and preamble insertion. The device supports multiple modulation types via Function Images, including 4FSK (FI-2.x), GMSK/GFSK (FI-1.0), and FFSK/MSK (FI-3.0). It includes two auxiliary ADCs, four auxiliary DACs (one with RAMDAC for PA ramping), and three analogue inputs. Communication with the host microcontroller is handled via a C-BUS serial interface. The component is housed in a 48-pin LQFP package.

Feature Summary

• Supports multiple modulation schemes including 4FSK, GMSK/GFSK, and FFSK/MSK through configurable Function Images.
• Integrates automatic frame sync detection and preamble insertion to minimize host intervention.
• Includes carrier sense functionality for listen-before-talk operation and automatic transmit hardware control.
• Features auxiliary analog subsystems comprising two ADCs, four DACs, and three discriminator/RSSI inputs.

Applications

• Wireless data modems requiring flexible modulation support
• RD-LAP Tx/Rx systems compatible with CMX969
• Low-power portable communication devices

Procurement Notes

Verify the specific Function Image version required for your application, as modulation capabilities depend on the uploaded firmware. Confirm package availability, as the L4 suffix denotes the LQFP variant. Ensure proper decoupling of AVDD and DVDD rails during integration. Check for updated datasheets regarding boot configuration options.

Selection Notes

Select this model if 4FSK modulation is required, corresponding to Function Image 7143FI-2.x. For GMSK or FFSK requirements, verify compatibility with FI-1.0 or FI-3.0 respectively. Ensure the host system supports the C-BUS serial interface. Consider power consumption profiles if operating in powersave modes frequently.

Part Context

The CMX7143L4 belongs to the CMX7143 series of multi-mode wireless data modems. The 'L4' suffix specifically identifies the 48-pin LQFP package variant. Other variants may include VQFN packages or different Function Image configurations. This component is part of CML's FirmASIC technology line, allowing field upgrades via Function Image updates.

Replacement Considerations

Direct replacements are limited due to the proprietary Function Image architecture. Verify if alternative Function Images within the same family meet modulation needs. Cross-reference pinouts and electrical specifications with other CMX7143 variants before substitution.