83940DY-01LFT

Overview

The ICS83940DY-01LFT is a low skew clock buffer and fanout distributor manufactured by Renesas Electronics. It features a 1-to-18 output ratio, converting differential LVPECL inputs to 18 LVCMOS/LVTTL outputs. The device supports maximum frequencies up to 250 MHz and operates on supply voltages ranging from 2.375V to 3.465V. Packaged in a 32-LQFP (7x7 mm) surface-mount enclosure, it is characterized for industrial temperature ranges of -40°C to 85°C. This component is designed for applications requiring precise clock distribution with guaranteed part-to-part skew characteristics.

Feature Summary

• 1-to-18 Fanout Buffer: Converts single differential input to 18 LVCMOS/LVTTL outputs.
• High Frequency Operation: Supports clock frequencies up to 250 MHz.
• Low Skew Performance: Designed for well-defined performance and repeatability in clock distribution.
• Flexible Input/Output: Accepts LVPECL/CML/SSTL inputs; provides LVCMOS/LVTTL outputs.

Applications

• Clock distribution networks in high-speed digital systems.
• Fanout buffering for LVCMOS/LVTTL loads in telecommunications equipment.
• System timing architectures requiring low skew and high fanout capabilities.

Procurement Notes

This specific part number (83940DY-01LFT) is listed as discontinued or obsolete by the manufacturer. Verification of current availability through authorized distributors is required, as stock may be limited or restricted. Alternative sourcing should consider end-of-life status and potential lead time constraints associated with last-time-buy scenarios.

Selection Notes

Select this component when a 1-to-18 fanout buffer is required with LVCMOS/LVTTL outputs. Ensure the system design accommodates the 32-LQFP package dimensions and the specified voltage range of 2.375V to 3.465V. Verify that the input signal levels match the supported LVPECL, CML, or SSTL standards. Note that due to discontinuation, long-term supply stability must be evaluated against newer replacement options.

Part Context

The ICS83940 series belongs to Renesas' portfolio of clock drivers and distributors, originally developed under Integrated Device Technology (IDT). These devices are engineered for high-performance clock management, offering low impedance outputs suitable for driving terminated transmission lines. The series emphasizes reliability in demanding environments through guaranteed skew specifications across operating conditions.

Replacement Considerations

As the 83940DY-01LFT is discontinued, verify functional equivalents within the same family or newer generations from Renesas. Cross-reference pinouts and electrical parameters to ensure compatibility. Consult official substitution guides for recommended active parts that maintain similar fanout ratios and output logic levels.