HC-49/U-S25000000AMJB

Crystals Overview

The HC-49/U-S25000000AMJB is a 25 MHz through-hole quartz crystal resonator manufactured by Citizen Finedevice. It features an HC-49/US package with a standard load capacitance of 18 pF. The component exhibits a frequency tolerance of ±30 ppm and a frequency stability of ±60 ppm. It operates within a temperature range of -10°C to +70°C and has a maximum series resistance (ESR) of 50 ohms. The device is RoHS compliant and lead-free, designed for general-purpose timing applications requiring stable oscillation frequencies.

Crystals Feature Summary

• Through-hole mounting configuration in a standard HC-49/US case
• Stable 25 MHz fundamental frequency output
• Low equivalent series resistance for efficient circuit drive
• RoHS compliant construction without lead content

Crystals Applications

• Microcontroller clock source generation
• Communication interface timing circuits
• General-purpose digital logic timing references
• Consumer electronics oscillator circuits

Crystals Procurement Notes

Verify the specific suffix AMJB against your schematic requirements to ensure compatibility with existing circuit designs. Confirm that the 18 pF load capacitance matches your oscillator circuit's total stray capacitance. Check for RoHS compliance documentation if required by your manufacturing standards. Ensure the through-hole package fits your PCB footprint constraints.

Crystals Selection Notes

Select this component when a 25 MHz reference is needed for through-hole assembly. Consider the ±30 ppm tolerance for initial accuracy and ±60 ppm stability over the operating temperature range. Evaluate the 50 ohm ESR against your driver circuit capabilities. Compare against other HC-49/US variants if different load capacitances or tighter tolerances are required.

Crystals Part Context

This part belongs to the HC-49/U series of quartz crystals from Citizen Finedevice. These components are widely used as frequency control elements in electronic circuits. The HC-49/US package is a standard industry form factor for through-hole crystals. This specific model provides a fixed 25 MHz frequency, making it suitable for common digital systems.

Crystals Replacement Considerations

Direct substitutes include HC-49/U-S25000000ABJB from the same manufacturer. Other manufacturers offer equivalent HC-49/US 25 MHz crystals with similar electrical specifications. Verify package dimensions and pin spacing when sourcing alternatives from different suppliers.