CM7V-T1A-32.768KHZ-6PF-20PPM-TB-QA

Crystals Overview

The Micro Crystal CM7V-T1A-32.768KHZ-6PF-20PPM-TB-QA is a surface-mount tuning fork quartz crystal designed for precision timing applications. It operates at a standard frequency of 32.768 kHz with a load capacitance of 6 pF and a frequency tolerance of ±20 ppm at 25°C. The component features an equivalent series resistance (ESR) of up to 70 kOhms and supports a maximum drive level of 1 μW. It is housed in a compact SMD package measuring 3.2 mm in length, 1.5 mm in width, and 0.9 mm in height. The device is qualified under the AEC-Q200 automotive standard and functions within a temperature range of -40°C to +125°C.

Crystals Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Hermetic ceramic-metal seal construction for stability
• Low power consumption with 1 μW max drive level
• Compact 3.2 x 1.5 mm SMD footprint

Crystals Applications

• Automotive electronics clock sources
• Industrial control system timing
• IoT device real-time clocks

Crystals Procurement Notes

Verify that the specific suffix TB indicates the extended temperature range of -40°C to +125°C, as this differs from the standard TA rating. Confirm the 6 pF load capacitance matches the target MCU's RTC requirements. Ensure the ordering code explicitly includes the AEC-Q200 qualification if automotive compliance is mandatory for the project. Cross-reference the datasheet for the exact aging specifications associated with this variant.

Crystals Selection Notes

Select this model when a small form factor is required alongside automotive-grade reliability. The 6 pF load capacitance suits microcontrollers with lower internal capacitance needs. The wide operating temperature range makes it suitable for harsh environments where standard commercial parts would fail. Consider the ESR limits to ensure compatibility with low-drive RTC circuits without risking overdriving or failure to oscillate.

Crystals Part Context

This part belongs to the CM7V-T1A series of tuning fork crystals manufactured by Micro Crystal AG. The series is characterized by its hermetic sealing technology, which ensures long-term frequency stability and resistance to environmental stressors. The T1A designation typically refers to the specific case style and mounting configuration optimized for high-volume surface mount assembly processes.

Crystals Replacement Considerations

Direct substitutes include other AEC-Q200 qualified 32.768 kHz crystals with identical 6 pF load capacitance and similar physical dimensions. Verify that alternative components meet the same -40°C to +125°C temperature range and have comparable ESR values to maintain circuit performance.