M64

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks M64 is a Network Synchronization Module designed for packet network timing applications, utilizing Silicon Labs AccuTime technology. It implements both Grandmaster and Ordinary PTP clock functions compliant with IEEE Std 1588-2008 (PTPv2). The module integrates an 8 Mbyte SDRAM, 2 Mbyte flash memory, and a 10/100/1000 Ethernet PHY with hardware timestamping. Key interfaces include RGMII for host connectivity and dedicated timing outputs for PPS, Time of Day (ToD), and syntonized frequency. It supports SyncE and wirespeed pass-through to eliminate external switches in many deployments.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Comprehensive IEEE 1588-2008 implementation supporting Grandmaster and Ordinary Clock modes
• Integrated 10/100/1000 Ethernet PHY with full PTP functionality and wirespeed pass-through
• Timing interface providing Pulse Per Second (PPS), Time of Day (ToD), and syntonized frequency outputs
• Low power microprocessor architecture with hardware timestamping and JSON machine-to-machine communication support

Clock Generators, PLLs, Frequency Synthesizers Applications

• Packet network timing synchronization
• Telecommunications infrastructure requiring precise time distribution
• Network nodes needing Grandmaster or Ordinary PTP clock capabilities

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific firmware version required for the application, as features like JSON configuration are available in Release 3.0 and later. Confirm that the host board design accommodates the LGA-84 package dimensions and recommended land pattern. Ensure power supply rails match the specified VCC33, VCC25, VCC18, and VCC12 requirements for proper operation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the M64 when only Grandmaster and Ordinary PTP clock functions are needed. If transparent or boundary clock capabilities are required, the M68 model should be selected instead, as it is a superset of the M64. Consider the M64 for designs where the internal oscillator suffices, whereas the M68 includes an onboard oscillator.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The M64 belongs to the M68/M64 family of Network Synchronization Modules based on Silicon Labs AccuTime technology. These modules are engineered for high-precision time and frequency generation in packet networks. The M64 serves as the base variant within this family, offering essential PTP functionalities without the additional transparent/boundary clock features found in the M68.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The M68 is a functional superset of the M64, adding transparent and boundary clock capabilities. Direct replacement requires verifying if the additional features of the M68 are compatible with the existing system design and if the pinout remains identical for the LGA-84 package.