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Product Detailed Parameters
- Description：3.2x2.5 XO 1.8V 25ppm
- Series：QTK325
- Mfr：QST
- Package：Tape & Reel (TR)
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：32.768 kHz
- Function：Enable/Disable
- Output：CMOS
- Voltage - Supply：1.8V
- Frequency Stability：±25ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 85°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：3mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.126" L x 0.098" W (3.20mm x 2.50mm)
- Height - Seated (Max)：0.043" (1.10mm)
- Supplier Device Package：4-VDFN (3.2x2.5)
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Overview
The QTK325-32.768KDD-T is a standard CMOS crystal oscillator operating at a nominal frequency of 32.768 kHz. It functions within a supply voltage range of 1.8V and exhibits a frequency stability of ±25 ppm. The device utilizes a surface-mount package with dimensions of 3.2mm x 2.5mm and features four terminals in a no-lead configuration. It supports enable/disable control functionality and operates across a temperature range of -10°C to +70°C.
Feature Summary
- CMOS output signal generation for digital clock applications
- Integrated enable and disable control capability
- Compact surface-mount design suitable for space-constrained layouts
Applications
- Real-time clock circuits in portable electronics
- Microcontroller system timing references
- Low-power embedded device synchronization
Procurement Notes
Verify the specific suffix 'DD' against manufacturer documentation to confirm the 1.8V supply voltage and ±25 ppm stability specifications. Ensure the ordering part number matches the required package type and operational temperature range before procurement, as variations exist within the QTK325 series.
Selection Notes
Select this component when a low-frequency 32.768 kHz reference is required for timekeeping or slow-speed clocking. Consider the 1.8V supply requirement and the specific ±25 ppm stability tolerance relative to system timing accuracy needs. Evaluate the SMD footprint compatibility during PCB layout planning.
Part Context
This oscillator belongs to the QTK325 series from QST, designed for compact electronic applications. It serves as a precise timing source for systems requiring low-frequency clock signals. The series includes variants with different voltages and stabilities, such as the QTK325-32.768KBA-T which operates at 3.3V.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with other 32.768 kHz SMD oscillators based on pinout, voltage, and stability requirements.
