CM7V-T1A-32.768KHZ-7PF-20PPM-TB-QA

Crystals Overview

The Micro Crystal CM7V-T1A-32.768KHZ-7PF-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 7 pF and a frequency tolerance of ±20 ppm. The component features an equivalent series resistance (ESR) of up to 70 kOhms and supports a maximum drive level of 1 uW. 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 an extended temperature range from -40°C to +125°C.

Crystals Feature Summary

• AEC-Q200 qualified for automotive reliability requirements
• Hermetically sealed ceramic package with metal lid
• Low power consumption suitable for battery-operated devices
• High stability with low annual aging rate

Crystals Applications

• Automotive electronic control units
• Real-time clock circuits in IoT devices
• Industrial metering equipment
• Medical monitoring systems

Crystals Procurement Notes

Verify that the specific suffix TB indicates the extended temperature range capability up to +125°C, as this differs from standard commercial grades. Confirm the 7 pF load capacitance matches the target microcontroller's RTC input requirements to ensure accurate frequency generation without external trimming adjustments. Ensure procurement channels provide valid AEC-Q200 certification documentation for automotive compliance audits.

Crystals Selection Notes

Select this model when the design requires a small footprint combined with automotive-grade reliability. The 7 pF load capacitance is optimal for MCU interfaces designed for this specific value, simplifying PCB layout by reducing the need for complex parallel capacitor calculations. Consider the 70 kOhm ESR limit to ensure compatibility with low-drive-strength oscillator circuits commonly found in modern low-power processors.

Crystals Part Context

This component belongs to the CC7V/CM7V-T1A family of tuning fork crystals manufactured by Micro Crystal. These parts utilize a gold-soldered hermetic sealing process to protect the quartz resonator from environmental factors. The family is distinguished by its ability to maintain high frequency stability across wide temperature ranges while supporting the stringent vibration and shock requirements of the automotive industry.

Crystals Replacement Considerations

Direct substitutes include other Micro Crystal models within the same T1A series that share identical dimensions and electrical parameters but may differ in load capacitance or temperature grade. Cross-manufacturer replacements require careful verification of pinout compatibility, ESR limits, and drive level sensitivity to prevent oscillation failure.