8535AGI-31LFT

Overview

The Renesas 8535AGI-31LFT is a low skew, high-performance 1-to-4 fanout buffer belonging to the HiPerClockS family. It translates single-ended LVCMOS or LVTTL clock inputs into four differential 3.3V LVPECL outputs. The device supports selectable crystal or clock inputs and operates within a supply voltage range of 3.135 V to 3.465 V. Key electrical parameters include a maximum propagation delay of 1.75 ns, a typical output skew of 30 ps, and a maximum additive phase jitter of 0.057 ps RMS. It is housed in a 20-pin TSSOP package with a tape and reel configuration.

Feature Summary

• Four differential 3.3V LVPECL outputs for high-speed clock distribution
• Selectable single-ended LVCMOS/LVTTL clock or crystal inputs
• Maximum output frequency of 266 MHz
• Internally synchronized output enable to eliminate runt pulses

Applications

• High-performance computing systems requiring precise clock synchronization
• Telecommunications infrastructure equipment
• Data communication networks utilizing LVPECL logic levels

Procurement Notes

Verify the suffix 'T' indicates tape and reel packaging versus standard tube formats. Confirm RoHS compliance status as specified by the manufacturer's current documentation. Ensure the operating temperature range meets system requirements, noting variations between industrial and commercial grades within the product family.

Selection Notes

Select this component when a 1-to-4 fanout ratio from LVCMOS/LVTTL to LVPECL is required. Verify that the input signal levels match the specified LVCMOS or LVTTL standards. Consider the 20-pin TSSOP footprint for PCB layout constraints and ensure the power supply voltage remains within the 3.135 V to 3.465 V window for optimal performance.

Part Context

This part is a lead-free variant of the ICS8535I-31 series, manufactured by Renesas Electronics following its acquisition of Integrated Device Technology (IDT). It serves as a direct replacement for legacy IDT parts in designs requiring low skew clock buffering. The 'LF' designation confirms lead-free construction, while 'T' specifies the reel packaging format.

Replacement Considerations

The datasheet explicitly states that the 8535I-31 replaces the ICS8535I-11. Verify pin compatibility and electrical specifications before substituting other members of the 8535 family.