MCH12140DR2G

Clock Generators, PLLs, Frequency Synthesizers Overview

The MCH12140DR2G is a phase-frequency detector manufactured by onsemi, designed for phase-locked loop applications requiring minimal phase and frequency difference at lock. It operates with a maximum toggle frequency of 800 MHz and supports input frequencies from 650 MHz to 800 MHz. The device functions within an operating temperature range of -40°C to +70°C and utilizes a SOIC-8 surface-mount package. It requires a power supply voltage between 4.94 V and 5.5 V.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Provides differential UP and DOWN outputs to generate error voltage for VCO control based on phase and frequency differences.
• Functionally compatible with MC12040 phase-frequency detectors while extending maximum frequency performance.
• Includes internal input pulldown resistors and high electrostatic discharge protection capabilities.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Phase-locked loop circuits utilizing high-performance voltage-controlled oscillators
• Systems requiring MECL 10H logic level I/O compatibility
• +5.0 V system implementations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific DR2G suffix indicates tape and reel packaging. Check current status as the datasheet notes this device may be discontinued; consult onsemi representatives for availability and alternative sourcing options before finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the MCH12140 variant specifically for MECL 10H logic level compatibility rather than the MCK version. Ensure the application design accommodates the required input edge rate of less than 5.0 ns. Verify that the target system provides the necessary termination resistance and power supply voltage ranges specified in the DC characteristics tables.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the MCK12140 series of phase-frequency detectors produced by onsemi. It serves as a high-speed digital circuit used primarily as a phase comparator in analog phase-locked loops. The device determines lead or lag relationships between reference and VCO signals to maintain loop synchronization.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet identifies the MC12040 as functionally compatible. Contact onsemi representatives for information regarding active substitutes since this specific part number is noted as discontinued.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the functional difference between the MCH12140 and MCK12140?

The MCH12140 is compatible with MECL 10H logic levels, whereas the MCK12140 is compatible with 100 K ECL logic levels.

How does the device indicate frequency differences?

When the Reference and VCO inputs are unequal in frequency, the differential UP and DOWN outputs provide pulse streams that indicate whether the VCO frequency must increase or decrease to achieve lock.

What is the recommended input edge rate for proper operation?

For proper operation, the input edge rate of the R and V inputs should be less than 5.0 ns.