2308-4DCGI

Overview

The Renesas Electronics Corporation 2308-4DCGI is a 3.3V PLL zero-delay clock multiplier designed for high-speed clock distribution and multiplication applications. Operating within an input frequency range of 10 MHz to 133 MHz, the device aligns the phase between the incoming clock and output clocks to achieve zero delay. It features two banks of four outputs each, controlled via select addresses, allowing independent tri-stating of output banks. The component utilizes an external feedback pin to synchronize outputs with the input clock, ensuring low jitter performance. Manufactured in a 16-pin SOIC package, it supports LVTTL/LVCMOS interfaces and operates at a supply voltage of 3.3V.

Feature Summary

• Zero-delay phase alignment between input and output clocks
• Two independent banks of four outputs (8 total) with separate enable controls
• External feedback pin for precise synchronization
• Low jitter performance (<200 ps cycle-to-cycle)

Applications

• High-speed clock distribution systems
• Clock multiplication applications requiring phase alignment
• System testing modes using direct input clock drive

Procurement Notes

The 2308-4DCGI is identified as an obsolete or end-of-life product by the manufacturer. Availability is restricted, and verification of current stock status through authorized distributors is required before procurement planning. Compliance with RoHS standards should be confirmed against specific manufacturing dates due to potential legacy inventory variations.

Selection Notes

Select this component when a fixed-ratio clock multiplier with zero-delay characteristics is needed for frequencies up to 133 MHz. Ensure the design accommodates the 16-pin SOIC package and 3.3V power supply. Verify that the application requires the specific 2x multiplication ratio associated with the -4 suffix variant within the 2308 family.

Part Context

This part belongs to the IDT/Renesas 2308 series of zero-delay buffers and multipliers. The '4' in the model number typically denotes a specific prescaling/multiplication configuration (often 2x). The 'GI' suffix indicates a lead-free, halogen-free package variant in the standard SOIC-16 form factor, distinguishing it from higher-drive or industrial temperature variants.

Replacement Considerations

Direct replacements are limited due to the end-of-life status. Potential substitutes include other members of the 2308 family (e.g., 2308B-4DCG) if pin compatibility and electrical parameters match, or newer Renesas clock generator families. Cross-reference datasheets for output drive strength and jitter specifications.