DS31408GN

Overview

The DS31408GN is a dual DPLL timing IC manufactured by Microchip Technology, designed for Ethernet, SONET/SDH, Stratum, and telecom applications. It features 8 differential inputs and 14 differential outputs with sub-picosecond jitter performance. The device supports input frequencies up to 750MHz and operates on a single 1.8V supply voltage. It utilizes CMOS or TTL logic levels for input signals and provides CML, CMOS, LVDS, LVPECL, or TTL output formats. Housed in a 256-LBGA (CSBGA) package measuring 17x17mm, it functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual DPLL architecture providing sub-ps output jitter performance
• 8-input to 14-output ratio supporting complex clock distribution
• Differential input and output interfaces for signal integrity
• Operates at maximum frequency of 750MHz with 1.8V supply

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the procurement channel provides valid RoHS compliance documentation. Confirm that the 256-CSBGA package dimensions match the target PCB footprint requirements before finalizing orders.

Selection Notes

Select this component when sub-picosecond jitter cleaning is required for high-speed digital interfaces. The 8:14 I/O ratio suits designs needing extensive fan-out from fewer reference sources. Verify that the system design accommodates the 1.8V power domain and the thermal dissipation characteristics of the 256-LBGA package under maximum load conditions.

Part Context

This part belongs to the DS3140x family of timing solutions, which are optimized for telecommunications and datacom applications requiring precise clock generation and jitter attenuation. The DS31408 variant specifically addresses scenarios demanding multiple output clocks derived from a limited number of input references while maintaining strict phase noise specifications.

Replacement Considerations

Consult the official Microchip cross-reference guide for verified substitutes. Ensure any replacement maintains the 256-LBGA form factor and 1.8V operation. Verify that alternative parts support the same 8:14 input-to-output ratio and differential signaling requirements.