Overview
The MCH12140DG is a phase-frequency detector produced by onsemi, designed for phase-locked loop (PLL) applications that require minimal phase and frequency differences at lock. This device is functionally compatible with the MC12040 phase-frequency detector but extends the maximum frequency to 800 MHz. It is particularly useful when used in conjunction with high-performance Voltage-Controlled Oscillators (VCOs) to realize high-bandwidth PLLs. The MCH12140DG is packaged in a small outline, surface mount 8-lead SOIC package and is compatible with MECL™ 10H logic levels.
Key Specifications
| Characteristic | Value | Unit |
|---|---|---|
| Maximum Toggle Frequency | 800 | MHz |
| Propagation Delay (R, V to D, U) | 250 - 500 | ps |
| Output Rise/Fall Times (20 to 80%) | 100 - 350 | ps |
| Input Voltage Range | 0 to -6.0 | VDC |
| Operating Temperature Range | -40 to +70 | °C |
| Power Supply Voltage Range | -5.7 to -4.2 | VDC |
| ESD Protection | >1000 V | |
| Package Type | SOIC-8 (Pb-Free) |
Key Features
- Typical bandwidth of 800 MHz
- Small outline 8-lead SOIC package
- 75 kΩ internal input pulldown resistors
- >1000 V ESD protection
- Pb-free, halogen-free, and RoHS compliant
- Compatible with MECL™ 10H logic levels
- Operates in +5.0 V systems
Applications
The MCH12140DG is used as a phase comparator in analog phase-locked loops. It determines the phase and time difference between the leading edges of a VCO signal and a Reference input. This device is particularly useful in high-speed digital circuits where precise phase and frequency control are necessary. It can be applied in various communication systems, frequency synthesizers, and other applications requiring high-bandwidth PLLs.
Q & A
- What is the primary function of the MCH12140DG?
The MCH12140DG is a phase-frequency detector used in phase-locked loop applications to determine the phase and frequency differences between a Reference input and a VCO signal. - What is the maximum toggle frequency of the MCH12140DG?
The maximum toggle frequency is 800 MHz. - What type of package does the MCH12140DG come in?
The device is packaged in a small outline, surface mount 8-lead SOIC package. - Is the MCH12140DG compatible with MECL™ 10H logic levels?
Yes, the MCH12140DG is compatible with MECL™ 10H logic levels. - What is the operating temperature range of the MCH12140DG?
The operating temperature range is -40°C to +70°C. - Does the MCH12140DG have ESD protection?
Yes, the device has >1000 V ESD protection. - Is the MCH12140DG Pb-free and RoHS compliant?
Yes, the device is Pb-free, halogen-free, and RoHS compliant. - What are the typical applications of the MCH12140DG?
The device is used in high-speed digital circuits, communication systems, frequency synthesizers, and other applications requiring high-bandwidth PLLs. - How does the MCH12140DG handle phase differences between the Reference and VCO inputs?
The device provides differential UP and DOWN outputs that indicate the phase difference, helping to adjust the VCO frequency to bring the loop into lock. - Can the MCH12140DG operate in +5.0 V systems?
Yes, the device can operate in +5.0 V systems.
