CM7V-T1A-LOW-ESR-32.768KHZ-9PF-20-TB-QA

Crystals Overview

The CM7V-T1A-LOW-ESR-32.768KHZ-9PF-20-TB-QA is a surface-mount tuning fork crystal operating at 32.768 kHz with a load capacitance of 9 pF and frequency tolerance of ±20 ppm. It features low equivalent series resistance (ESR) of up to 50 kΩ, enabling stable oscillation in low-power microcontrollers without additional drive circuitry. The component utilizes gold-silicon alloy hermetic sealing for high reliability, offering annual aging stability of ±3 ppm. It supports an extended temperature range from -40°C to +125°C and meets AEC-Q200 automotive qualification standards.

Crystals Feature Summary

• Low ESR design facilitates direct connection to weak RTC drive ports in ultra-low power MCUs
• Gold-silicon alloy hermetic sealing ensures long-term frequency stability and environmental robustness
• Compact SMD package suitable for space-constrained wearable and IoT device designs

Crystals Applications

• Real-time clock circuits in battery-powered wearable devices
• IoT metering systems requiring precise timekeeping
• Automotive electronics meeting AEC-Q200 standards
• Industrial monitoring equipment operating in wide temperature ranges

Crystals Procurement Notes

Verify the specific ordering suffix to confirm the exact load capacitance and temperature grade, as variations exist within the CM7V-T1A family. Ensure compatibility with the target MCU's drive level requirements, specifically checking that the low ESR specification aligns with the controller's minimum oscillation threshold. Confirm packaging format preferences during procurement to match assembly line capabilities.

Crystals Selection Notes

Select this variant when minimizing RTC standby current is critical, as the low ESR reduces the drive strength required from the microcontroller. Choose this model over standard ESR versions if the application involves strict size constraints or requires operation at temperatures up to 125°C. Consider the ±3 ppm annual aging for applications demanding high long-term accuracy without frequent calibration.

Crystals Part Context

This component belongs to the Micro Crystal CM7V-T1A series, which offers various configurations for different load capacitances and temperature ranges. The 'LOW-ESR' designation distinguishes it from standard variants by providing reduced internal resistance, optimizing performance for modern ultra-low power consumption architectures found in contemporary embedded systems.

Crystals Replacement Considerations

Direct substitutes include other CM7V-T1A variants with matching 9pF load capacitance and ±20ppm tolerance but potentially different ESR levels or temperature grades. Cross-reference with CC7V-T1A series components for similar form factors, ensuring electrical parameters like ESR and drive level compatibility are verified before substitution.