MK1581-01GI

Clock Generators, PLLs, Frequency Synthesizers Overview

The MK1581-01GI is a low phase noise T1/E1 clock generator manufactured by Renesas Electronics Corporation (originally IDT). It generates a synchronized 1.544 MHz or 2.048 MHz output clock from an 8 kHz frame clock input using an on-chip VCXO and external quartz crystal. The device operates within a supply voltage range of 3.15 V to 3.45 V, with a typical supply current of 15 mA. It supports configurable jitter attenuation via external loop filter components and functions in an industrial temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates T1 (1.544 MHz) or E1 (2.048 MHz) clocks from an 8 kHz reference input
• VCXO-based architecture ensures very low jitter and phase noise generation
• Configurable jitter attenuation characteristics suitable for Stratum source de-jitter circuits
• +115 ppm minimum crystal frequency pullability range

Clock Generators, PLLs, Frequency Synthesizers Applications

• Synchronization and timing control for T1 based network access systems
• Timing control for E1 based multitrunk telecommunication systems
• Stratum source de-jitter circuits

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized channels as the part may be subject to end-of-life status. Confirm RoHS compliance requirements, noting that non-green parts have specific end-of-life dates. Ensure ordering suffixes match required packaging types such as tubes or tape and reel.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the appropriate external quartz crystal frequency based on the desired output: 24.704 MHz for T1 or 24.576 MHz for E1. Configure the SEL pin to determine the output frequency. Design the external loop filter using recommended RSET, RS, CS, and CP values to achieve the desired loop bandwidth and damping factor for optimal jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MK1581-01 series was originally developed by Integrated Device Technology (IDT) before being acquired by Renesas Electronics. The 'GI' suffix denotes the standard commercial/industrial grade version packaged in a 16-pin TSSOP. This component serves as a cost-effective replacement for more expensive hybrid VCXO retiming modules in telecommunications infrastructure.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.