PI6CX201ALEX

Clock Generators, PLLs, Frequency Synthesizers Overview

The PI6CX201ALEX is a jitter attenuator featuring an integrated phase-locked loop and VCXO, optimized for 25MHz applications. It operates on a single 3.3V supply (3.135V to 3.465V) with an industrial temperature range of -40°C to +85°C. The device accepts LVCMOS inputs and provides two LVCMOS outputs. Typical output phase jitter is less than 350fs RMS within a 12kHz to 5MHz bandwidth. Input frequencies supported include 25MHz, 12.5MHz, 33.33MHz, and 66.67MHz. It utilizes a 20-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a PLL with a voltage-controlled crystal oscillator for clock jitter attenuation
• Provides lock detection functionality via a dedicated logic output pin
• Supports free run mode with fixed frequency offset capability

Clock Generators, PLLs, Frequency Synthesizers Applications

• Clock jitter attenuation in digital systems
• Frequency synthesis from various input sources to 25MHz
• Low jitter clock generation for sensitive interfaces

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the component origin as Pericom Semiconductor Corporation, which was acquired by Diodes Incorporated. Confirm that the ordering suffix 'X' indicates tape and reel packaging. Ensure the specific revision matches the required datasheet version for accurate electrical characteristics.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a low-jitter 25MHz clock is required from diverse input frequencies such as 12.5MHz or 33.33MHz. Consider the external loop filter requirements and the necessity of pairing with a compatible SaRonix-eCera crystal for optimal performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the PI6CX201A family of jitter attenuators. It is functionally equivalent to the PI6CX201ALE but differs in packaging format. The device serves as a specialized solution for stabilizing clock signals in high-speed digital environments requiring precise frequency control.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacement requires verifying the package type. The standard PI6CX201ALE uses a tube, whereas the PI6CX201ALEX uses a tape and reel. Ensure the manufacturing source is identified correctly as Pericom/Diodes Incorporated.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How is the free run mode activated?

Free run mode is activated by driving the FREE_RUN pin logic low. In this state, the output remains at a fixed frequency with up to a ±100ppm offset.

What determines the output frequency divider ratio?

The internal CLK_OUT2 divider ratio is controlled by the logic states of selection pins S0, S1, and S2.

What are the conditions for the Lock Detect (LD) output to trigger?

The LD output goes logic low when the REF_CLK frequency is greater than 1MHz and the phase difference between REF_CLK and FB_CLK exceeds 2ns for eight consecutive clock pulses.