2308-2DCG

Overview

The Renesas Electronics Corporation 2308-2DCG is a discontinued high-speed phase-lock loop (PLL) clock multiplier designed for zero-delay clock distribution. It operates within a frequency range of 10 MHz to 133 MHz and accepts a single LVCMOS input, distributing the signal to eight outputs organized into two banks of four. The device supports 1x and 2x multiplication ratios via address pins. Key electrical specifications include a maximum output frequency of 133 MHz, an operating supply voltage of 3.3 V, and a typical operating current of 45 mA. It features low jitter (<200 ps cycle-to-cycle) and output skew (<200 ps).

Feature Summary

• Zero-delay PLL architecture aligns output phase with the input clock reference.
• Configurable 1x or 2x multiplication ratios selected via external address pins.
• Two independent output banks allow separate tri-state control for power management.
• External feedback pin enables user-controlled delay between input and outputs.

Applications

• High-speed clock distribution in digital systems requiring precise timing alignment.
• Clock multiplication for processors and memory interfaces operating up to 133 MHz.
• System testing modes where the PLL is bypassed to drive outputs directly from the input.

Part Context

The 2308-2DCG belongs to the IDT/Renesas 2308 family of zero-delay buffers. This series provides flexible clock generation solutions with options for different multiplication factors and drive strengths. The '2' suffix indicates support for 1x and 2x ratios, while 'DCG' denotes the SOIC-16 package variant. The component is characterized for commercial temperature ranges.

Replacement Considerations

The 2308-2DCG is listed as obsolete. Potential replacements within the same family include the 2308B-2DCG, which shares similar functional characteristics and packaging. Designers should verify that alternative components meet the specific 1x/2x ratio requirements and 133 MHz performance limits.