QT1M-32.768KDZC-T

Overview

The QT1M-32.768KDZC-T is a quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 32.768 kHz with a standard load capacitance of 12.5 pF. The component exhibits an equivalent series resistance (ESR) of 65 kΩ and offers a frequency tolerance of ±20 ppm at 25°C. It is housed in a compact 2-SMD, No Lead package with dimensions of 6.9 mm x 1.4 mm. The device supports an operating temperature range from -40°C to +85°C, ensuring reliable performance in various electronic environments.

Feature Summary

• Tuning-fork crystal design optimized for low-power real-time clock circuits
• Compact surface-mount package suitable for space-constrained PCB layouts
• Stable frequency output with defined load capacitance requirements

Applications

• Real-time clock (RTC) modules in embedded systems
• Digital watches and wearable timekeeping devices
• Microcontroller oscillator circuits requiring precise timing references

Procurement Notes

Verify the specific suffix KDZC against the manufacturer's latest datasheet to confirm package type and tolerance specifications. Ensure the target circuit design accommodates the 12.5 pF load capacitance and 65 kΩ ESR parameters. Confirm that the operating temperature range meets the environmental requirements of the final application before procurement.

Selection Notes

Select this component when a 32.768 kHz reference is required for RTC functions with moderate accuracy needs. The 20 ppm tolerance suits general consumer electronics rather than high-precision instrumentation. Consider the physical footprint constraints as the 6.9x1.4 mm size is larger than some modern ultra-small alternatives. Verify compatibility with the host microcontroller's oscillator input characteristics.

Part Context

This part belongs to QST's line of quartz crystal resonators, specifically tuned-fork types used for low-frequency timing. These components are distinct from higher-frequency AT-cut crystals or integrated oscillators. The model number indicates specific mechanical and electrical characteristics defined by the manufacturer's internal coding system for surface-mount tuning forks.

Replacement Considerations

Direct substitutes must match the 32.768 kHz frequency, 12.5 pF load capacitance, and 65 kΩ ESR. Alternative packages may require schematic and layout modifications. Verify that replacement parts maintain the same operating temperature range and frequency stability specifications to ensure system reliability.