8543BGLF

Overview

The ICS8543BGLF is a clock fan-out buffer and multiplexer manufactured by Renesas Electronics. It features a 2:4 input-to-output ratio with differential LVDS outputs. The device supports multiple input standards including CML, HCSL, LVDS, LVHSTL, LVPECL, and SSTL. It operates at a maximum frequency of 800 MHz with a supply voltage range of 3.135 V to 3.465 V. Packaged in a 20-TSSOP (0.173 inch, 4.40 mm wide) surface-mount enclosure, it is designed for commercial temperature ranges from 0°C to 70°C.

Feature Summary

• Supports 2:4 fan-out buffering and multiplexing functions
• Accepts diverse input formats: CML, HCSL, LVDS, LVHSTL, LVPECL, SSTL
• Provides differential LVDS outputs
• Operates up to 800 MHz with 3.135 V to 3.465 V supply

Applications

• High-speed digital signal distribution
• Clock tree generation in networking equipment
• Server and storage system timing architectures

Procurement Notes

Verify component status as the 8543BGLF is listed as obsolete or end-of-life in public records. Confirm availability through authorized distributors or secondary markets. Check for specific RoHS compliance timestamps and assembly site changes documented in PCNs. Ensure the package matches the 20-TSSOP specification.

Selection Notes

Select this component when a 2:4 fan-out buffer with mixed-mode input compatibility is required. Compare against the ICS8543BGIT variant if an extended industrial temperature range (-40°C to 85°C) and tape-and-reel packaging are necessary. Verify that the 800 MHz maximum frequency meets the system's clock requirements.

Part Context

This part belongs to the ICS8543 family of clock buffers. Similar models include the ICS8543BGILF and ICS8545B series, which offer comparable 2:4 ratios but may differ in frequency specifications or operating temperature ranges. The ICS8543BGLF specifically targets commercial applications with its 0°C to 70°C rating.

Replacement Considerations

Public records indicate the ICS8543BGIT as a functional alternative with extended temperature range and different packaging. Verify pinout compatibility and electrical parameters before substitution.