QT3CD-32.768KEZY-T

Overview

The QT3CD-32.768KEZY-T is a surface-mount quartz crystal oscillator manufactured by QST Products, LLC. It operates at a fundamental frequency of 32.768 kHz with a load capacitance of 7 pF. The component features a tolerance of ±10 ppm and an ESR of 70,000 Ohms. It is housed in a 2-SMD, no-lead package with dimensions of 3.2 x 1.5 x 0.9 mm. The device supports a commercial operating temperature range of -40°C to +85°C and is supplied in tape and reel packaging.

Feature Summary

• Provides precise timing reference via fundamental mode quartz resonance
• Designed for compact surface-mount integration in space-constrained PCB layouts
• Maintains frequency stability within specified limits across defined thermal conditions

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system oscillators
• Portable battery-powered devices requiring low power consumption

Procurement Notes

Verify the manufacturer part number against official QST documentation to ensure authenticity. Confirm that the specific suffix matches the required tolerance and load capacitance specifications for your circuit design. Check RoHS compliance status if environmental regulations apply to your manufacturing process. Ensure the receiving facility accepts tape-and-reel packaging formats for automated assembly.

Selection Notes

Select this component when a 32.768 kHz reference is required for timekeeping or low-frequency signaling. The ±10 ppm tolerance suits applications needing moderate accuracy without expensive trimming. The small 3.2x1.5 mm footprint allows placement on dense boards. Verify that the 7 pF load capacitance aligns with the oscillator circuit's internal capacitors to prevent frequency deviation.

Part Context

This part belongs to QST's line of standard surface-mount crystals. It shares the same physical outline as other variants in the series but differs in electrical parameters such as tolerance and ESR. The KEZY suffix specifically denotes the ±10 ppm tolerance and 7 pF load capacitance configuration, distinguishing it from higher or lower precision alternatives.

Replacement Considerations

Direct substitutes include QT3CD-32.768KDZY-T (±20 ppm) and QT3C-32.768KAZY-T (±30 ppm), provided the reduced accuracy meets system requirements. Ensure any replacement maintains the 7 pF load capacitance and 3.2x1.5 mm package dimensions to fit existing footprints.