ICS557G-08

Overview

The ICS557G-08 is a 2:1 multiplexer chip designed for PCI Express applications. It selects one of two HCSL or LVDS input pairs and fans out to one pair of differential outputs. The device operates on a 3.3 V supply (3.135V ~ 3.465V) with a maximum frequency of 200 MHz for HCSL inputs. It features low power consumption, an operating temperature range of 0°C to 70°C, and is housed in a 16-TSSOP surface-mount package.

Feature Summary

• 2:1 Multiplexing Functionality
• HCSL/LVDS Input/Output Support
• Low Power Consumption
• 16-Pin TSSOP Package

Applications

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

Procurement Notes

Verify the specific ordering suffix (e.g., LF for lead-free, G for commercial temp, GI for industrial temp) against the datasheet table on page 10. Confirm packaging options such as tubes or tape and reel are available for the selected variant. Ensure compatibility with the required operating temperature range before procurement.

Selection Notes

Select based on input signal type (HCSL up to 200 MHz or LVDS up to 100 MHz). Choose the appropriate temperature grade: 557G-08 for 0°C to +70°C or 557GI-08 for -40°C to +85°C. Ensure PCB layout guidelines for differential routing and termination resistors are followed to maintain signal integrity.

Part Context

The ICS557G-08 belongs to the IDT/ICS 557 series of clock multiplexers. It is specifically engineered for PCI Express systems requiring flexible clock source selection between local card sources and motherboard clocks. The device simplifies system design by providing a single differential output from selectable inputs.

Replacement Considerations

Direct replacements within the same family include the 557GI-08 for industrial temperature ranges. Verify pinout and electrical specifications match if considering cross-manufacturer alternatives. Check for updated revisions or EOL notices for non-green parts.