DS31400GN

Overview

The DS31400GN is a dual DPLL timing integrated circuit manufactured by Microchip Technology, designed for Ethernet, SONET/SDH, Stratum, and telecom applications. It features an 8:14 input-to-output ratio with differential inputs and outputs. The device supports CMOS and TTL inputs, providing CML, CMOS, LVDS, LVPECL, and TTL outputs. Operating at a maximum frequency of 750MHz, it requires a 1.8V supply voltage. Packaged in a 256-LBGA (CSBGA) surface-mount case measuring 17x17mm, it functions within a temperature range of -40°C to 85°C.

Feature Summary

• Dual DPLL architecture for high-precision timing
• 8-input, 14-output configuration with differential signaling
• Supports multiple output formats including LVDS, LVPECL, and CML
• Operates on a single 1.8V power supply

Applications

• Ethernet network synchronization
• SONET/SDH transport systems
• Stratum clocking standards
• Telecommunications infrastructure

Procurement Notes

Verify the specific package variant against the datasheet, as supplier listings may reference LBGA or CSBGA interchangeably. Confirm RoHS compliance status and check for any recent PCN updates regarding packing changes or material substitutions before finalizing orders.

Selection Notes

Select this component when dual independent phase-locked loops are required for complex clock distribution. Ensure the design accommodates the 256-pin BGA footprint and thermal requirements. Verify that the 1.8V supply rail aligns with the system's power architecture and that the 750MHz maximum frequency meets the target application's jitter specifications.

Part Context

This part belongs to the DS31400 series of timing ICs. It serves as a specialized solution for generating low-jitter clocks from various input sources. The device integrates dual DPLLs to provide flexible clock synthesis and distribution capabilities essential for modern digital communication networks.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family. Verify electrical parameters such as supply voltage and output drive strength. Ensure the replacement supports the required 8:14 ratio and differential I/O configurations.