SY58604UMG-TR

Clock Buffers, Drivers Overview

The SY58604UMG-TR is a high-speed, fully differential LVPECL buffer from the Precision Edge line. It processes clock signals up to 2.5GHz or data patterns up to 3.2Gbps with an ultra-low 108fs RMS phase jitter. The device features internal termination for LVPECL, LVDS, and CML inputs (AC/DC coupled) as small as 100mV. It includes a Fail Safe Input (FSI) to prevent output oscillation during invalid input states. Operating on a 2.5V ±5% or 3.3V ±10% supply, it guarantees propagation delays under 350ps and rise/fall times under 110ps across the industrial temperature range of –40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Ultra-low jitter design with 108fs RMS phase jitter at 622MHz
• Fail Safe Input (FSI) prevents metastability when input signal amplitude drops below typical 30mVpk
• Integrated 3-pin input termination architecture supports LVPECL, LVDS, and CML signals without external resistors
• Guaranteed AC performance: DC to >3.2Gbps throughput, <350ps typical propagation delay, <110ps rise/fall times

Clock Buffers, Drivers Applications

• SONET clock and data distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock and data distribution
• Backplane distribution

Clock Buffers, Drivers Procurement Notes

Verify the component is the Microchip Technology SY58604UMG-TR in the 8-pin DFN package. Confirm the suffix 'TR' indicates tape and reel packaging. Ensure the operating voltage matches the required 2.5V or 3.3V system rails. Check that the application requires LVPECL outputs and differential inputs compatible with the internal termination scheme.

Clock Buffers, Drivers Selection Notes

Select this buffer for applications requiring low jitter (<110ps rise/fall) and fail-safe behavior on invalid inputs. It is suitable for interfacing LVDS or CML sources directly to LVPECL loads. For CML or LVDS outputs instead, consider the SY58603U or SY58605U respectively. Ensure PCB layout accommodates the exposed ground pad for thermal management in the 2mm x 2mm DFN package.

Clock Buffers, Drivers Part Context

The SY58604U belongs to Micrel’s Precision Edge product line, now manufactured by Microchip Technology. It is part of a family including the SY58603U (CML output) and SY58605U (LVDS output). The device was originally designed by Micrel Inc., which has been acquired by Microchip. The 'UMG' designation refers to the 8-pin DFN package type.

Clock Buffers, Drivers Replacement Considerations

Direct replacements within the same family include the SY58603U for CML outputs and the SY58605U for LVDS outputs. Verify pin compatibility and output swing requirements before substitution. The SY58600UMG-TR is listed as a discontinued alternative for receiver/driver functions but is not a direct buffer replacement.