MK1581-01GITR

Clock Generators, PLLs, Frequency Synthesizers Overview

The MK1581-01GITR is a low phase noise T1/E1 clock generator manufactured by IDT, now part of Renesas Electronics. It generates a synchronized 1.544 MHz (T1) or 2.048 MHz (E1) output clock from an 8 kHz frame clock input using an on-chip VCXO and external quartz crystal. The device operates on a single 3.3 V supply with a voltage range of 3.15 V to 3.45 V. It features configurable jitter attenuation via external loop filter components and supports an industrial temperature range of -40°C to +85°C. The component is housed in a 16-pin TSSOP package.

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 low jitter and phase noise generation
• Configurable jitter attenuation characteristics for Stratum source de-jitter applications
• +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 multitrunk telecommunication systems
• Stratum source de-jitter circuits

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturing origin as Integrated Device Technology (IDT), which has been acquired by Renesas Electronics Corporation. Confirm RoHS compliance status, noting that non-green parts reached end-of-life on May 13, 2010. Ensure the specific ordering suffix matches the required packaging configuration, such as tape and reel for the GITR variant.

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 PLL loop filter using recommended values for RS, CS, CP, and RSET to achieve the desired loop bandwidth and damping factor. Ensure decoupling capacitors are placed close to VDD pins to minimize power supply noise.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MK1581-01 series includes variants such as MK1581-01GI (tube) and MK1581-01GILF (lead-free tube). The MK1581-01GITR specifically denotes the tape and reel packaging option. All variants share identical electrical specifications and functionality within the 16-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

For controlled input-to-output skew requirements, consider the MK2049 or MK2069 products as referenced in the datasheet notes.