DS31407GN2

Overview

The DS31407GN2 is a single digital phase-locked loop (DPLL) timing integrated circuit manufactured by Microchip Technology. It features three input clocks and four output clocks, supporting frequencies from 2kHz to 750MHz with less than 1ps RMS output jitter. The device operates on a 1.8V supply voltage within an industrial temperature range of -40°C to +85°C. Packaged in a 256-pin CSBGA (17x17mm), it includes differential or CMOS/TTL inputs/outputs, fractional scaling capabilities, and programmable bandwidth for telecom synchronization applications.

Feature Summary

• Three input clocks and four output clocks support frequencies up to 750MHz
• Output jitter is less than 1ps RMS via high-performance APLL
• Supports Stratum 2, 3E, 3, 4E, and 4 standards for telecom synchronization
• Includes two digital frequency synthesizers and hitless reference switching

Applications

• Telecom line cards or timing cards with SONET/SDH ports
• WAN equipment including MSPPs, Ethernet switches, and routers
• Base stations requiring Synchronous Ethernet or OTN synchronization

Procurement Notes

Verify the package type matches the 256-CSBGA (17x17mm) specification. Confirm the operating temperature range covers -40°C to +85°C. Ensure the 1.8V supply voltage requirement aligns with system design. Check for lead-free/RoHS compliance status indicated by the '+' suffix in ordering information.

Selection Notes

Select this component when sub-picosecond output jitter is required for high-speed clock synthesis. Verify that the 3:4 input-to-output ratio fits the system architecture. Consider the SPI interface requirements for configuration. Ensure the local oscillator frequency options (e.g., 12.8MHz, 25.6MHz) are compatible with available crystal resources.

Part Context

The DS31407GN2 belongs to the DS31407 family of timing ICs designed for flexible frequency conversion. It serves as a central timing function or line card timing solution. The 'GN2' suffix denotes the specific package and temperature grade variant within the broader product line.

Replacement Considerations

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