CM7V-T1A-32.768KHZ-12.5PF-10PPM-TB-QC

Crystals Overview

The Micro Crystal CM7V-T1A-32.768KHZ-12.5PF-10PPM-TB-QC is a surface-mount tuning fork quartz crystal operating at a standard frequency of 32.768 kHz. It features a load capacitance of 12.5 pF and a frequency tolerance of ±10 ppm. The component supports a maximum equivalent series resistance (ESR) of 70 kΩ and operates within a temperature range of -40°C to +125°C. Physical dimensions are 3.2 mm in length, 1.5 mm in width, and 0.65 mm in height.

Crystals Feature Summary

• Utilizes a hermetically sealed ceramic package with a metal lid for enhanced environmental protection and long-term stability.
• Designed for low-power applications with a maximum drive level of 1 μW, suitable for weak RTC driver ports.
• Offers high reliability with significant resistance to mechanical shock and vibration.

Crystals Applications

• Real-time clock circuits in industrial metering devices
• Timekeeping sources for automotive electronic control units
• Clock generation for wearable health monitoring devices

Crystals Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to ensure alignment with required load capacitance, frequency tolerance, and temperature range specifications. Confirm that the TB temperature grade matches the operational environment requirements before finalizing procurement orders.

Crystals Selection Notes

Select this component when a tight frequency tolerance of ±10 ppm is required alongside an extended industrial temperature range up to +125°C. Ensure the system design accommodates the 12.5 pF load capacitance and verify that the MCU RTC interface can support the specified ESR limits without excessive drive levels.

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 small SMD footprint and robust construction, targeting applications demanding precise timing in harsh environments. The TB suffix indicates the specific wide-temperature operational capability of this variant.

Crystals Replacement Considerations

Direct substitutes include other CM7V-T1A variants with matching electrical parameters but different tolerances or temperature grades, such as those with ±20 ppm tolerance or TA temperature ranges. Cross-brand replacements require careful verification of pin compatibility, load capacitance, and ESR characteristics.