SY898535LKY

Clock Buffers, Drivers Overview

The SY898535LKY is a Precision Edge low skew fanout buffer manufactured by Microchip Technology. It translates single-ended LVCMOS or LVTTL inputs to four differential 3.3V LVPECL outputs. The device features two selectable clock inputs (CLK0, CLK1) and a synchronous clock enable pin. Operating from a 3.3V ±5% supply, it supports maximum output frequencies up to 235MHz with propagation delays under 1.9ns and output skew below 30ps. Additive phase jitter is typically 0.09ps RMS. It operates within an industrial temperature range of –40°C to +85°C and is housed in a 20-pin TSSOP package.

Clock Buffers, Drivers Feature Summary

• Translates LVCMOS/LVTTL inputs to four differential 3.3V LVPECL copies
• Selects between two single-ended clock inputs (CLK0 or CLK1)
• Synchronous clock enable input prevents runt pulses during assertion/de-assertion
• Guaranteed AC performance: <1.9ns propagation delay, <30ps output skew, <250ps part-to-part skew

Clock Buffers, Drivers Applications

• Gigabit Ethernet
• 10 Gigabit Ethernet
• SONET/SDH
• PCI interfaces

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. The 'K' suffix indicates the 20-pin TSSOP package type, while 'Y' denotes the industrial temperature operating range. Confirm whether the required unit quantity corresponds to tape and reel specifications if applicable.

Clock Buffers, Drivers Selection Notes

Select this component when interfacing LVCMOS or LVTTL sources to LVPECL loads requiring low skew distribution. Ensure the design accommodates a 3.3V ±5% power supply and operates within the specified -40°C to +85°C temperature limits. Verify that the 235MHz maximum frequency meets system timing requirements.

Clock Buffers, Drivers Part Context

The SY898535L belongs to Micrel’s Precision Edge product line, designed for high-speed signal integrity. This specific part number represents the industrial grade variant packaged in a 20-pin TSSOP format. It serves as a bridge between standard logic levels and high-speed differential signaling standards.

Clock Buffers, Drivers Replacement Considerations

Consult official cross-reference lists for verified substitutes. Generic family members may share similar functionality but require verification of electrical parameters and pin compatibility before implementation.

Clock Buffers, Drivers FAQ

How does the device handle asynchronous clock enable signals?

The clock enable pin is synchronized with the input signal to eliminate runt pulses on the outputs during asynchronous assertion or de-assertion.

What are the default states of the control pins if left open?

CLK_EN has an internal 51kΩ pull-up resistor defaulting to HIGH. CLK_SEL has an internal 51kΩ pull-down resistor defaulting to LOW, selecting the CLK0 input.

What is the typical output voltage swing?

The differential LVPECL outputs have a typical peak-to-peak voltage swing of 800mV.