8543BGLFT

Overview

The ICS8543BGLFT is a clock fan-out buffer and multiplexer manufactured by Renesas Electronics Corporation. It features a 2:4 input-to-output ratio with differential CML, HCSL, LVDS, LVHSTL, LVPECL, or SSTL inputs and LVDS outputs. The device operates at a maximum frequency of 800 MHz and is powered by a single 3.135V to 3.465V supply. Packaged in a 20-TSSOP (0.173 inch, 4.40mm wide) surface-mount enclosure, it supports an operating temperature range of 0°C to 70°C.

Feature Summary

• Supports multiple input standards including CML, HCSL, LVDS, LVHSTL, LVPECL, and SSTL
• Provides four LVDS differential outputs for clock distribution
• Operates at frequencies up to 800 MHz
• Available in a 20-TSSOP surface-mount package

Applications

• High-speed data communication systems requiring clock distribution
• Server and storage infrastructure timing networks
• Telecommunications equipment signal routing

Procurement Notes

Verify the specific suffix 'GLFT' against current manufacturer documentation to confirm packaging type and RoHS compliance status. Check for End-of-Life (EOL) notices or Product Change Notifications (PCN) as this component family has undergone manufacturing site changes. Confirm availability through authorized distributors as stock levels vary.

Selection Notes

Select the 8543BGLFT when a 2:4 fan-out buffer is required with support for legacy input standards like LVPECL or SSTL alongside modern LVDS outputs. Ensure the design accommodates the 3.3V nominal supply voltage and the thermal requirements of the 20-TSSOP package within the 0°C to 70°C commercial temperature range.

Part Context

The 8543BGLFT belongs to the ICS8543 series of low-power, high-performance clock buffers. This series is designed for applications requiring flexible input compatibility and clean clock distribution. The 'BG' indicates the 20-TSSOP package, while 'LF' denotes lead-free construction, and 'T' specifies tape-and-reel packaging.

Replacement Considerations

The ICS8543BGIT is a similar variant offering a 650 MHz maximum frequency with an extended -40°C to 85°C operating temperature range. Verify if the lower frequency and wider temperature span meet system requirements before substituting.