HC49USM-FF3F18-11.0592MHZ

Crystals Overview

The ILSI HC49USM-FF3F18-11.0592MHZ is a surface-mount quartz crystal resonator designed for precision frequency control applications. It operates at a nominal frequency of 11.0592 MHz with a standard fundamental oscillation mode. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 60 Ohms maximum. Frequency tolerance and stability are rated at ±30 ppm. It utilizes the HC-49/US package format, measuring approximately 11.4 mm in length, 4.73 mm in width, and 4.50 mm in height. The device supports operation within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Surface mount construction compatible with automated assembly processes
• Grounded metal package design intended to minimize electromagnetic interference
• Compliant with lead-free processing standards and RoHS regulations

Crystals Applications

• T1/E1 system clock generation
• T3/E3 digital transmission systems
• SONET/SDH network synchronization equipment

Crystals Procurement Notes

Verify that the specific part number suffix matches the required frequency tolerance and load capacitance specifications for the target circuit design. Confirm that the surface mount footprint aligns with the PCB layout requirements for the HC-49/US package style. Ensure environmental ratings meet the operational temperature constraints of the final application environment before procurement.

Crystals Selection Notes

Select this component when a stable 11.0592 MHz reference signal is required for serial communication interfaces or digital logic timing. The 18 pF load capacitance must match the oscillator circuit's external capacitive requirements to ensure accurate frequency output. Consider the 60 Ohm ESR limit to verify compatibility with the driving amplifier stage impedance characteristics.

Crystals Part Context

This model belongs to the HC49USM series manufactured by ILSI America, a provider of frequency control solutions. The series represents a transition from traditional through-hole crystals to surface mount variants while maintaining the robust mechanical properties associated with the HC-49/US form factor. This specific variant targets high-reliability industrial and telecommunications sectors requiring precise timing references.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US SMD crystals with identical 11.0592 MHz frequency, 18 pF load capacitance, and ±30 ppm tolerance. Verify pin compatibility and physical dimensions to ensure seamless integration without PCB redesign.