CM309S3.579545MABJT

Crystals Overview

The CM309S3.579545MABJT is a surface-mount AT-cut crystal manufactured by Citizen Finedevice Co Ltd. It operates at a fundamental frequency of 3.579545 MHz with a load capacitance of 18 pF. The component features a frequency tolerance of ±30 ppm and stability of ±50 ppm. It utilizes a 4-SOJ package with a 9.40 mm pitch, measuring 12.40 mm in length, 4.40 mm in width, and 3.70 mm in height. The equivalent series resistance is 100 Ohms, and it supports a maximum drive level of 1 mW. The device functions within a temperature range of -10°C to +60°C.

Crystals Feature Summary

• AT-cut fundamental resonance mode for stable oscillation
• Surface-mount 4-SOJ cylinder configuration
• Low equivalent series resistance design

Crystals Applications

• Clock signal generation for microcontrollers
• Real-time clock circuits
• Communication interface timing sources

Crystals Procurement Notes

Verify the specific suffix and pitch requirements against the target PCB footprint before ordering. Confirm that the 18 pF load capacitance matches the oscillator circuit design parameters. Check current availability status as this component may be subject to discontinuation or supply constraints. Ensure the operating temperature range meets the environmental requirements of the final application.

Crystals Selection Notes

Select this component when a precise 3.579545 MHz reference is required for digital logic interfaces. The 4-SOJ package offers a compact solution for space-constrained designs. Consider the ±30 ppm tolerance for applications requiring moderate frequency accuracy. Evaluate the -10°C to +60°C operating range against ambient conditions.

Crystals Part Context

This part belongs to the CM309S series of MHz crystals from Citizen Finedevice. The series provides surface-mount solutions for various standard frequencies. The CM309S line focuses on cost-effective, reliable timing components for consumer and industrial electronics. This specific model addresses the common 3.579545 MHz requirement for color subcarrier and real-time clock applications.

Crystals Replacement Considerations

ECS-60-18-7SX-TR is a documented direct substitute for the CM309S6.000MABJT variant within the same series family.