PI49FCT3805CHE

Clock Buffers, Drivers Overview

The PI49FCT3805CHE is a 3.3V non-inverting clock driver manufactured by Diodes Incorporated (formerly Pericom). It features two independent buffer groups, each with a 1-in, 5-out configuration and active LOW 3-state Output Enable inputs. The device provides extremely low output skew of 0.5ns and includes a dedicated monitor output pin. It operates within an industrial temperature range of –40°C to +85°C and utilizes a 20-pin SSOP package.

Clock Buffers, Drivers Feature Summary

• Dual independent 1-to-5 non-inverting clock buffers with 3-state control
• Extremely low output skew: 0.5ns maximum
• Dedicated monitor output pin for diagnostics
• TTL input and CMOS output compatibility

Clock Buffers, Drivers Applications

• Clock bus distribution with 3-state control
• High-speed clock distribution requiring low skew
• Single point-to-point transmission line driving

Clock Buffers, Drivers Procurement Notes

Verify the 'H' suffix confirms the 209-mil wide SSOP package and the 'E' suffix indicates Pb-free and Green compliance. Confirm the 'C' speed grade matches system timing requirements against the datasheet's switching characteristics table.

Clock Buffers, Drivers Selection Notes

Select this component for applications requiring dual 1:5 fanout with minimal skew. Ensure the load capacitance does not exceed 50pF to maintain the specified propagation delay. Verify that the 3.3V supply voltage aligns with the target logic levels.

Clock Buffers, Drivers Part Context

This part belongs to the PI49FCT3805/3806 series of 3.3V Fast CMOS Buffer/Clock Drivers. It is the non-inverting counterpart to the PI49FCT3806. The 'CHE' suffix specifically denotes the C-speed grade in a Pb-free 20-pin SSOP package.

Clock Buffers, Drivers Replacement Considerations

Direct replacements include other PI49FCT3805 variants with different packages or speed grades, such as PI49FCT3805CS or PI49FCT3805Q. Cross-vendor equivalents like IDT49FCT3805 may require verification of pinout and electrical parameters.

Clock Buffers, Drivers FAQ

What is the function of the MON pin?

The MON pin serves as a monitor output, providing a signal identical to the main outputs for diagnostic purposes or PLL driving.

How is the 3-state control implemented?

The device uses two active LOW 3-state Output Enable inputs, OEA and OEB, to independently control the enable/disable state of each buffer group.

What is the maximum output skew?

The maximum output skew between two outputs of the same package is 0.5ns.