AB-557-03-HCHC-F-L-C-T3

Overview

The AB-557-03-HCHC-F-L-C-T3 is a crystal-less dual-output clock generator from the Pure Silicon™ series by Abracon LLC. Designed for PCI Express applications, it operates within a supply voltage range of 2.25V to 3.6V and supports frequencies up to 460MHz. The device features HCSL output formats on both channels and is housed in a compact 14-QFN (3.2x2.5mm) package with an exposed pad. It includes enable/disable functionality and meets PCIe Gen 1.1 through Gen 3.0 jitter specifications.

Feature Summary

• Crystal-less design utilizing MEMS technology for high shock and vibration immunity
• Dual differential outputs with HCSL format (HCHC suffix)
• Supports frequencies up to 460MHz with ±100ppm overall stability
• Low power consumption with 60mA typical supply current

Applications

• PCI Express (PCIe) systems meeting Gen 1.1, Gen 2.1, and Gen 3.0 specifications
• Storage Area Networks (SAN)
• Passive Optical Networks (PON)
• Ethernet interfaces including 1G, 10GBASE-T/KR/LR/SR, and FCoE

Procurement Notes

Verify the T3 packaging suffix indicates a tape and reel quantity of 3,000 pieces per reel. Confirm that the HCHC designation correctly specifies HCSL output formats for both Clock 0 and Clock 1. Ensure the L suffix corresponds to the -40°C to +85°C operating temperature range required for the specific application environment.

Selection Notes

Select this component when a crystal-less solution is required for space-constrained designs due to its 3.2x2.5mm footprint. Verify that the HCSL output logic levels are compatible with the receiving devices. Check if the standard ±100ppm frequency stability meets system requirements; otherwise, consider the C option for ±50ppm stability.

Part Context

This part belongs to the AB-557-03 series of ultra-miniature SMD clock generators. The series offers mixed output formats including LVCMOS, LVPECL, LVDS, and HCSL. The T3 suffix specifically denotes the bulk packaging configuration containing 3,000 units per reel, distinct from the standard T packaging which contains 1,000 units.

Replacement Considerations

For alternative frequencies other than 100MHz, the datasheet suggests considering the ASEMDxx series. Direct pin-compatible replacements within the same family require matching the output format suffixes (e.g., HC for HCSL) and temperature grades.