83940DYILF

Overview

The Renesas Electronics 83940DYILF is a low skew, 1-to-18 LVPECL-to-LVCMOS/LVTTL fanout buffer. It features two selectable clock inputs: the PCLK/nPCLK pair accepts LVPECL, CML, or SSTL levels, while the LVCMOS_CLK input accepts LVCMOS or LVTTL levels. The device provides eighteen low impedance LVCMOS/LVTTL outputs designed to drive 50Ω series or parallel terminated transmission lines. It operates at full 3.3V, full 2.5V, and mixed supply modes. Characterized for guaranteed output and part-to-part skew, it supports applications requiring well-defined performance.

Feature Summary

• Eighteen LVCMOS/LVTTL outputs with 16Ω typical output impedance
• Selectable LVCMOS_CLK or LVPECL clock inputs
• Low skew characteristics for precise clock distribution

Applications

• Clock distribution systems demanding repeatability
• LVPECL to LVCMOS/LVTTL conversion interfaces
• Driving 50Ω terminated transmission lines

Procurement Notes

This component is discontinued and no longer in production. Verification of availability should focus on last-time buy windows or existing surplus stock from authorized distributors. Ensure compliance with RoHS standards as indicated in official documentation before procurement consideration.

Selection Notes

Select this component when a 1-to-18 fanout buffer is required with mixed voltage compatibility (LVPECL input to LVCMOS/LVTTL output). Verify that the system requires the specific 32-pin LQFP package and that the operating temperature range meets design constraints. Confirm power supply requirements align with the supported 3.3V and 2.5V modes.

Part Context

The 83940DYILF belongs to the ICS83940 family manufactured by IDT, now part of Renesas Electronics. This series is designed for high-performance clock distribution where low skew and multiple output drives are critical. The device serves as a bridge between differential high-speed clock sources and single-ended logic loads.

Replacement Considerations

As the product is discontinued, verify if alternative parts from the same family or newer generations are available. Check pin compatibility and electrical specifications against current inventory components.