9C-7.680MAAJ-T

Crystals Overview

The FTS 9C-7.680MAAJ-T is a fundamental mode AT-cut quartz crystal resonator operating at 7.68 MHz. It utilizes the HC-49/US through-hole package with radial termination. Key electrical parameters include a load capacitance of 18 pF, an equivalent series resistance (ESR) of 80 Ohms, and a frequency tolerance of ±30 ppm. The device supports a drive level of 100 µW and functions within a temperature range of -20°C to +70°C.

Crystals Feature Summary

• Fundamental oscillation mode using AT-cut quartz technology
• Standard HC-49/US through-hole mechanical form factor
• RoHS compliant lead-free construction

Crystals Applications

• Microcontroller clock source generation
• Digital communication interface timing
• General-purpose oscillator circuits

Crystals Procurement Notes

Verify manufacturer designation as FTS or TXC Corporation due to shared part numbering conventions in the industry. Confirm RoHS compliance status and specific ESR value (80 Ohms vs 100 Ohms variants) against the official datasheet before integration. Ensure the HC-49/US package dimensions match the target PCB footprint requirements for proper assembly.

Crystals Selection Notes

Select this component when a 7.68 MHz reference signal is required with ±30 ppm initial tolerance. The 18 pF load capacitance must match the circuit design's external capacitor values. Consider the 80 Ohm ESR specification for oscillator loop gain stability. The HC-49/US package is suitable for manual or standard wave soldering processes.

Crystals Part Context

This crystal belongs to the 9C series, a common line of general-purpose quartz resonators. The HC-49/US package is a widely adopted standard for through-hole mounting in consumer electronics and industrial control systems. The 7.68 MHz frequency is frequently used in baud rate generation for serial communication protocols.

Crystals Replacement Considerations

The CITIZEN HC49US-7.680MABJ-UB is a documented alternative with similar specifications. Verify that the substitute maintains the 18 pF load capacitance and compatible ESR levels to ensure oscillator circuit stability without redesign.