8535AG-21LFT

Overview

The Renesas 8535AG-21LFT is a clock buffer and multiplexer IC from the 8535I series, manufactured by Renesas Electronics Corporation. It features a 2:4 input-to-output ratio, supporting LVCMOS or LVTTL single-ended inputs and converting them to four differential 3.3V LVPECL outputs. The device operates with a supply voltage range of 3.135V to 3.465V and supports maximum frequencies up to 266MHz. Packaged in a 20-TSSOP (0.173", 4.40mm wide) surface-mount format, it is designed for low skew clock distribution applications within an ambient operating temperature range of -40°C to 85°C.

Feature Summary

• Converts single-ended LVCMOS/LVTTL inputs to four differential 3.3V LVPECL outputs
• Maximum output frequency of 266MHz with 2:4 fan-out ratio
• Low skew performance with typical output skew of 30ps and maximum part-to-part skew of 200ps
• Internally synchronized output enable to eliminate runt pulses during asynchronous assertion/deassertion

Applications

• Clock distribution networks requiring translation from CMOS/TTL levels to LVPECL
• High-speed digital systems demanding low additive phase jitter (typical 0.057ps RMS)
• Data communication equipment utilizing differential clock signaling

Procurement Notes

Verify the specific suffix '21' against official Renesas documentation, as standard listings often reference the '01' variant. Confirm RoHS compliance status and current production lifecycle stage directly with the manufacturer or authorized distributors, as availability may vary by region and date.

Selection Notes

Select this component when a 2:4 conversion from single-ended logic levels to differential LVPECL is required. Ensure the design accommodates the 3.3V supply voltage range and the 20-TSSOP footprint. Verify that the 266MHz maximum frequency meets system timing requirements and that the package thermal characteristics suit the intended operating environment.

Part Context

This part belongs to the Renesas 8535A/I family of low skew clock buffers. The '8535I' designation typically indicates industrial temperature grade (-40°C to 85°C). The 'LF' suffix denotes lead-free packaging compliant with RoHS standards. The 'T' suffix usually indicates tape-and-reel packaging, while 'AG' may indicate specific manufacturing or testing configurations.

Replacement Considerations

The datasheet notes that the 8535I-31 replaces the ICS8535I-11. For direct pin-compatible replacements within the same family, verify the 8535AGI-01LF or similar variants with matching 2:4 ratios and LVPECL outputs. Always confirm electrical parameters and package dimensions before substitution.