82V3355TFG8

Overview

The 82V3355TFG8 is a Synchronous Ethernet WAN Phase-Locked Loop (PLL) manufactured by Renesas Electronics. It serves as a Stratum 3, SMC, 4E, and 4 clock source for telecommunications infrastructure. The device integrates T0 and T4 Digital Phase-Locked Loops (DPLLs) to provide node clocks compliant with ITU-T G.8261/G.8262 standards. It supports input frequencies up to 622.08 MHz and operates within a supply voltage range of 3.0 V to 3.6 V. The component is housed in a 64-pin Thin Quad Flat Package (TQFP-64) with an exposed pad, designed for surface-mount installation across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates T0 and T4 DPLLs for independent or cascaded locking configurations.
• Supports programmable bandwidth from 0.1 Hz to 560 Hz in 11 steps.
• Provides Stratum 3, SMC, 4E, and 4 timing solutions on a single chip.
• Features automatic hitless switching between selected input clock sources.

Applications

• Synchronous Ethernet WAN node clocks.
• Cellular and WLL base-station timing (GSM/3G networks).
• DSL access concentrators (DSLAM) and Japan TCM-ISDN network timing.
• SONET/SDH synchronization equipment.

Procurement Notes

The 82V3355TFG8 is identified as an End-of-Life (EOL) product with discontinuance notices issued by the manufacturer. Availability is restricted, and sourcing requires verification of stock status through authorized channels. Buyers must confirm RoHS compliance details and moisture sensitivity levels prior to procurement due to the component's discontinued status.

Selection Notes

Select this component for applications requiring Stratum 3 or lower timing accuracy in Synchronous Ethernet environments. Ensure design compatibility with LVCMOS, LVDS, and LVPECL input/output levels. Verify that the required DPLL bandwidth settings align with the available 11-step configuration options. Consider the 64-TQFP package dimensions for PCB layout constraints.

Part Context

This part belongs to the 82V3355 series of Synchronous Ethernet PLLs. It shares functional similarities with variants such as the 82V3355EDG but differs in packaging and suffix specifications. The 'TFG8' designation indicates specific pinning and environmental compliance attributes defined by Renesas for this generation of telecom timing ICs.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the available documentation. Designers should consult official Renesas EOL replacement guides or contact technical support for qualified alternatives compatible with Synchronous Ethernet WAN requirements.