2305M-1HLFT

Overview

The 2305M-1HLFT is a 3.3V zero-delay low-skew clock buffer manufactured by Renesas Electronics Corporation, formerly IDT. It utilizes a proprietary Phase-Locked Loop (PLL) to generate four low-skew outputs from a single input, achieving zero input-to-output delay. The device supports clock frequencies up to 133 MHz and features full CMOS outputs with 25 mA drive capability at TTL levels. It includes a 5 V tolerant CLKIN pin and offers tri-state mode for board-level testing. Packaged in an 8-pin SOIC, it operates within industrial temperature ranges.

Feature Summary

• Zero-delay buffering using on-chip PLL feedback for minimal jitter
• Four low-skew outputs with sub-250 ps skew specification
• Tri-state control mode for system testing and isolation
• 5 V tolerant input compatible with various logic levels

Applications

• High-speed clock distribution networks
• System synchronization in data communication equipment
• Board-level clock buffering for processors and FPGAs
• Low-jitter clock generation in industrial instrumentation

Procurement Notes

Verify the specific suffix 'HLFT' against the manufacturer's current product status, as variants within the 2305 family may have different drive strengths or availability. Confirm that the high-drive 'H' variant meets the rise/fall time requirements of the target application. Ensure the tape-and-reel packaging format aligns with automated assembly capabilities. Cross-reference the RoHS compliance status if environmental regulations are strict for the deployment region.

Selection Notes

Select this component when zero input-to-output delay is critical for system timing integrity. The high-drive version is suitable for loads requiring faster edge rates compared to the standard 2305-1. Consider the 8-pin SOIC package constraints for PCB layout density. Evaluate the 5 V tolerance of the CLKIN pin if interfacing with higher voltage logic sources without level shifting. Assess power consumption needs against the sub-micron CMOS process efficiency.

Part Context

This part belongs to the Renesas (formerly IDT) 2305 series of zero-delay buffers. It shares architectural similarities with the 2305-1 but distinguishes itself through enhanced drive strength and transition speeds. The series is designed for applications demanding precise clock alignment across multiple downstream components, serving as a key element in timing-critical digital systems where phase noise and skew must be minimized.

Replacement Considerations

Public confirmed substitute part numbers: 2305A-1HDCGI8.