2308A-4DCG

Overview

The Renesas 2308A-4DCG is a discontinued 3.3V PLL zero-delay clock multiplier designed for high-speed clock distribution and multiplication applications. It operates within an input frequency range of 10 MHz to 133 MHz, providing eight LVCMOS outputs organized into two independent banks. The device achieves zero delay by synchronizing output phases with the input clock via an external feedback pin. Key electrical parameters include a maximum operating frequency of 133 MHz, a cycle-to-cycle jitter of 400 ps, and a typical supply current of 45 mA at 3.3 V. It is housed in a 16-pin SOIC package.

Feature Summary

• Zero-delay phase alignment between input reference and output clocks using external feedback
• Eight LVCMOS outputs distributed across two independently controllable banks
• Supports 1x, 2x, and 4x multiplication ratios via address pins
• Low power consumption with less than 25 uA draw in power-down mode

Applications

• High-speed clock distribution networks
• System synchronization requiring precise phase alignment
• Multiplication of reference clocks up to 133 MHz

Procurement Notes

The 2308A-4DCG is officially listed as obsolete or end-of-life by Renesas Electronics. Mouser indicates that the product is not currently sold in many regions. Verification of availability requires checking authorized distributors for remaining stock or alternative sourcing channels, as standard manufacturing has ceased.

Selection Notes

Select this component only if legacy compatibility with the IDT 2308 family is required. Ensure the design supports the 133 MHz maximum frequency limit and 3.3 V logic levels. Verify that the SOIC-16 package footprint matches the PCB layout, as newer designs may require packages like TSSOP or QFN found in other clock generator families.

Part Context

This part belongs to the 2308 series of zero-delay clock multipliers, originally developed by Integrated Device Technology (IDT) and later acquired by Renesas Electronics. The '4' suffix typically denotes specific multiplication factors (e.g., 2x or 4x options). The 'DCG' suffix identifies the SOIC-16 package variant with industrial temperature range characteristics.

Replacement Considerations

Direct replacements are limited due to the obsolete status. Potential substitutes within the Renesas portfolio include the 23S08 series (spread spectrum compatible) or the 2308B series, though pinouts and features may differ. Cross-reference with IDT2308A-4DCGI8 for identical functional specifications.