IDT49FCT20805PYI8

Clock Buffers, Drivers Overview

The IDT49FCT20805PYI8 is a dual 1-to-5 clock driver built using advanced CMOS technology, operating at VCC = 2.5V ± 0.2V. It features two independent output banks with 3-state control and a 'heartbeat' monitor output for diagnostics. The device supports frequencies up to 166MHz with guaranteed low skew of less than 200ps (max) and very low propagation delay under 2.5ns (max). Designed for high-speed clock distribution where signal quality is critical, it offers TTL-compatible inputs and outputs in a 20-pin SSOP package.

Clock Buffers, Drivers Feature Summary

• Dual 1:5 fanout per bank with independent 3-state control
• Operating frequency up to 166MHz
• Low skew < 200ps (max) and propagation delay < 2.5ns (max)
• 'Heartbeat' monitor output identical to other outputs

Clock Buffers, Drivers Applications

• High speed clock distribution systems
• Address distribution requiring low skew
• PLL driving applications
• Diagnostics monitoring via heartbeat output

Clock Buffers, Drivers Procurement Notes

Verify the specific suffix '8' against the official datasheet ordering information, as the provided document lists standard industrial variants (IDT49FCT20805PYI) without this trailing digit. Confirm RoHS compliance status, as standard green packages are noted but specific reel quantities or tape-and-reel designations require cross-reference with manufacturer packaging specifications.

Clock Buffers, Drivers Selection Notes

Select this component when a dual-bank clock buffer with 1:5 fanout is required at 2.5V logic levels. Ensure the application operates within the -40°C to +85°C industrial temperature range. Verify that the input signal meets TTL compatibility requirements and that the load capacitance does not exceed the specified limits for the target frequency performance.

Clock Buffers, Drivers Part Context

This part belongs to the FCT20805 family of 2.5V CMOS clock drivers manufactured by Integrated Device Technology (now Renesas Electronics). The 'PY' suffix indicates a Shrink Small Outline Package (SSOP), while the 'I' denotes the industrial temperature grade. The device is designed to replace older bipolar clock drivers with lower power consumption and higher speed capabilities.

Clock Buffers, Drivers Replacement Considerations

Direct pin-compatible replacements include other FCT20805 variants such as IDT49FCT20805QGI or IDT49FCT20805NDGI, provided the package type matches. When substituting, verify that the replacement device maintains the same 2.5V supply requirement and 166MHz maximum frequency rating.