MK2049-36SILF

Overview

The MK2049-36SILF is a phased-locked loop (PLL) based clock synthesizer packaged in a 20-pin SOIC lead-free package. It operates at 3.3V (+5%) and accepts multiple inputs, including an 8 kHz backplane clock or 10 to 50 MHz signals. The device generates communications frequencies such as T1, E1, T3, E3, and OC3 submultiples, locking to 8 kHz with ±100 ppm accuracy in external mode. It meets TR62411, ETS300 011, and GR-1244 specifications for Stratum 3, 4, and 4E regarding MTIE, pull-in/hold-in range, phase transients, and jitter generation.

Feature Summary

• Generates T1, E1, T3, E3, and OC3 submultiples from an 8 kHz reference
• Accepts 8 kHz backplane clock or 10–50 MHz input frequencies
• Buffer mode provides jitter attenuation for 10–50 MHz inputs
• Complies with TR62411, ETS300 011, and GR-1244 Stratum 3/4/4E specifications

Applications

• Clock synchronization in communications systems
• Filtering jitter from clocks with high jitter content
• Generating frequency-locked clocks for telecommunications infrastructure

Procurement Notes

The MK2049-36SILF is listed as obsolete. Verify availability through secondary market channels or authorized distributors handling end-of-life inventory. Confirm the specific suffix 'SILF' corresponds to the 20-pin SOIC lead-free tube carrier type. Check for alternative versions like MK2049-36SILFTR if reel packaging is required.

Selection Notes

Select this component when designing systems requiring precise synchronization to an 8 kHz backplane clock. Ensure the application demands compliance with Stratum 3, 4, or 4E jitter and phase transient standards. Consider the buffer mode capability if jitter attenuation of higher frequency inputs is necessary for the target output rates.

Part Context

This part belongs to the MK2049 family of PLL-based clock synthesizers. Related variants include the MK2049-34 and MK2049-45. IDT, now part of Renesas, offers customization for different frequencies upon request. The device simplifies clock synchronization by generating standard telecom frequencies directly from a low-frequency reference.

Replacement Considerations

Consult the manufacturer's documentation for direct substitutes within the MK2049 series, such as the MK2049-34 or MK2049-45. Since the part is obsolete, verify pin compatibility and electrical specifications against potential replacement components before integration.