ICS557G-08T

Overview

The ICS557G-08T is a 2:1 multiplexer chip designed for PCI Express applications, manufactured by Renesas Electronics Corporation. It allows the selection of one of two HCSL or LVDS input pairs and fans out to one pair of differential outputs. The device operates at a maximum frequency of 200 MHz with an HCSL termination and up to 100 MHz with LVDS termination. It functions within a supply voltage range of 3.135V to 3.465V and supports commercial temperature operation from 0°C to +70°C. Packaged in a 16-pin TSSOP (0.173" width), it provides low power consumption and requires minimal external components.

Feature Summary

• 2:1 Multiplexing Functionality
• HCSL/LVDS Input/Output Support
• Low Power Consumption
• Commercial Temperature Range

Applications

• PCI Express Clock Selection
• Motherboard Clock Routing
• PCI-E Card Clock Sources

Procurement Notes

Verify the specific ordering suffix to confirm package type and temperature range. The 'T' suffix indicates tape and reel packaging. Ensure compatibility with the required operating temperature range, as non-industrial variants are limited to 0°C to +70°C. Confirm RoHS compliance status based on the 'LF' suffix if lead-free material is required for the assembly process.

Selection Notes

Select this component when a single-ended or differential clock source needs to be switched between two inputs for a PCI Express system. Verify that the input signal levels match the HCSL or LVDS requirements. Ensure the PCB layout accommodates the 16-pin TSSOP footprint and includes necessary decoupling capacitors close to the VDD pins for optimal performance.

Part Context

This part belongs to the ICS557 series of PCI Express clock multiplexers. It is distinct from clock generators like the 557GI-05ALFT, which produce clocks rather than selecting them. The 'G' suffix typically denotes the standard commercial temperature grade, differentiating it from the 'I' grade industrial variant.

Replacement Considerations

Direct replacements include other parts from the ICS557 family, such as the ICS557G-08LF for tube packaging or the ICS557GI-08T for industrial temperature ranges. Cross-vendor equivalents should be verified against the 2:1 mux topology and PCIe signaling standards.