2308-3DCG

Overview

The Renesas Electronics 2308-3DCG is a 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 LVTTL outputs with a maximum output frequency of 133 MHz. The device features two independent banks of four outputs each, allowing separate enable control. Key electrical specifications include a maximum duty cycle of 60%, jitter of 400 ps, and a supply current of 45 mA. It is housed in a 16-SOIC surface-mount package and supports commercial operating temperatures from 0°C to +70°C.

Feature Summary

• Zero-delay buffer architecture aligns output phase with the incoming clock input
• Two independent output banks of four channels each with separate enable controls
• Supports 2x and 4x multiplication ratios via external address selection
• External feedback pin allows synchronization of outputs to the clock input

Applications

• High-speed clock distribution systems
• Clock multiplication for processors and memory interfaces
• System testing modes using direct input clock drive

Procurement Notes

The 2308-3DCG is listed as obsolete or end-of-life by major distributors such as Mouser and DigiKey. Verification of availability requires checking secondary market suppliers or authorized stockists for remaining inventory. Confirm RoHS compliance status and moisture sensitivity level (MSL) prior to procurement, as legacy components may have specific handling requirements.

Selection Notes

Select the 2308-3DCG when a 3.3V LVTTL zero-delay multiplier with 1:8 ratio is required. Ensure the application frequency falls between 10 MHz and 133 MHz. Verify that the SOIC-16 package fits the PCB layout constraints. Compare against the IDT2308-3DCI8 if tape-and-reel packaging is preferred over tubes, noting potential differences in temperature rating or lead-free status.

Part Context

This component belongs to the IDT 2308 family of zero-delay clock multipliers, originally developed by Integrated Device Technology (IDT) and later acquired by Renesas Electronics. The '3' suffix indicates specific multiplication options (2x and 4x). The 'CG' suffix typically denotes the commercial temperature range and lead-free/ROHS compliant variations in some contexts, though datasheets should be consulted for exact environmental compliance details.

Replacement Considerations

The IDT2308-3DCI8 is a documented alternative part number for this device, offering similar functionality in a tape-and-reel package. Users should verify pin compatibility and electrical parameters before substitution.