NX3225SA-12.288M-STD-CRS-2

Overview

The NDK NX3225SA-12.288M-STD-CRS-2 is a surface-mount passive crystal oscillator designed for compact consumer electronics and short-range wireless applications. It operates at a nominal frequency of 12.288 MHz using fundamental mode oscillation, eliminating the need for overtone matching circuits. The component features a standard 3225 package with dimensions of 3.2 x 2.5 x 0.55 mm, ensuring compatibility with space-constrained designs such as TWS charging cases and wearable devices. Key electrical specifications include a frequency tolerance of ±15 ppm at 25°C and a temperature stability of ±25 ppm across the -40°C to +85°C range. The equivalent series resistance (ESR) is limited to 100 Ω maximum, facilitating reliable startup in low-power microcontroller circuits.

Feature Summary

• Ultra-thin 0.55 mm profile optimized for tight structural constraints in portable devices
• Fundamental mode operation simplifies circuit design by removing overtone filtering requirements
• Robust thermal and mechanical resilience suitable for lead-free reflow soldering processes
• Compliance with RoHS 2.0 directives supports global regulatory standards

Applications

• Low-power Bluetooth wearable devices
• TWS earbuds and charging cases
• Short-range wireless communication modules
• Portable audio equipment clock sources

Procurement Notes

Verify that the ordering suffix STD-CRS-2 corresponds to the specific load capacitance and tolerance configuration required by your schematic. Confirm the ESR limits align with your MCU's oscillator drive capability to prevent cold-start failures. Ensure PCB layout guidelines regarding ground pin connections are strictly followed to maintain signal integrity and EMC performance during production.

Selection Notes

Select this model when fundamental frequency accuracy is sufficient for the application, avoiding the complexity of overtone crystals. Verify that the ±15 ppm initial tolerance meets the system's frequency budget. Consider customizing the load capacitance if the default 8 pF does not match the existing circuit parasitics, which may require adjusting external capacitors to achieve precise frequency alignment.

Part Context

This component belongs to the NX3225SA series, engineered specifically for miniaturized consumer electronics. It addresses the industry demand for smaller footprints and lower profiles without compromising reliability. The series is widely utilized in mobile phones, tablets, and smart wearables where space efficiency and stable timing are critical for system synchronization and data transmission.

Replacement Considerations

Direct substitutes within the same series include NX3225SA variants with different frequencies or tolerances. Cross-model replacements from other manufacturers must be validated against ESR, drive level, and load capacitance parameters to ensure functional equivalence.