HC49USM-FF5F18-16.000MHZ

Crystals Overview

The ILSI HC49USM-FF5F18-16.000MHZ is a surface-mount parallel fundamental quartz crystal operating at a nominal frequency of 16 MHz. It features a frequency tolerance and stability of ±30 ppm and utilizes an 18 pF load capacitance. The component is housed in an SMD package with dimensions of 13.3 mm x 4.7 mm. It supports a maximum drive level of 1 mW and operates within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Surface mount construction for automated assembly
• Parallel fundamental resonance mode operation
• AT-cut quartz element for thermal stability

Crystals Applications

• General purpose timing circuits
• Microcontroller clock sources
• Communication interface synchronization

Crystals Procurement Notes

Verify the specific suffix FF5F18 against the target PCB footprint, as HC49USM variants may differ in terminal configuration or solderability requirements compared to through-hole equivalents. Confirm that the ±30 ppm stability meets the system's jitter and phase noise specifications. Ensure the 1 mW drive level is compatible with the oscillator circuit to prevent over-driving the crystal.

Crystals Selection Notes

Select this component when a low-profile surface-mount solution is required for 16 MHz applications. The HC49USM form factor offers space savings compared to traditional HC-49/U through-hole packages. Consider the ±30 ppm tolerance relative to the host system's clock accuracy requirements. Verify compatibility with lead-free reflow processes if RoHS compliance is mandatory for the final product.

Crystals Part Context

This part belongs to the HC49USM series of surface-mount crystals manufactured by ILSI America. The series provides standard fundamental frequency options in a compact metal can package designed for SMD assembly. These components are engineered to replace bulkier through-hole crystals while maintaining similar electrical performance characteristics for cost-sensitive consumer and industrial electronics.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC49USM-16MHz crystals with matching 18pF load capacitance and ±30ppm tolerance. Verify mechanical footprint compatibility before substitution. Cross-reference datasheets for drive level and ESR differences to ensure circuit stability.