EC2645ETTTS-25.000M TR

Oscillators Overview

The EC2645ETTTS-25.000M TR is a CMOS Quartz Crystal Clock Oscillator (XO) manufactured by Ecliptek. It operates at a nominal frequency of 25.000 MHz with a maximum frequency tolerance and stability of ±50 ppm, inclusive of calibration, temperature range, voltage change, load change, aging, shock, and vibration. The device utilizes LVCMOS output logic and requires a 3.3 Vdc supply voltage with a maximum operating current of 18 mA. It features a 4-pad ceramic surface mount package measuring 5.0 mm x 7.0 mm. Pin 1 provides tri-state control for high impedance disable functionality. The component supports an operating temperature range from -40°C to +85°C and complies with RoHS standards.

Oscillators Feature Summary

• Integrated tri-state control on Pin 1 allows for high impedance output disable to reduce power consumption during standby modes.
• Ceramic surface mount construction ensures mechanical stability and reliability in industrial environments.
• LVCMOS output interface provides compatibility with standard digital logic circuits.

Oscillators Applications

• Industrial gateway reference clock sources
• High-speed data communication interfaces
• Battery-powered industrial equipment requiring low-power standby states

Oscillators Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm that the ±50 ppm specification covers all environmental conditions including temperature drift and aging. Ensure the design accommodates the 5.0 mm x 7.0 mm footprint and 4-pad solder mask pattern. Check for lead-free compliance documentation if required for specific regional regulations.

Oscillators Selection Notes

Select this oscillator when a 25 MHz clock signal is required with moderate stability needs within an industrial temperature range. The 3.3 V supply requirement aligns with modern low-voltage digital systems. Consider the tri-state feature if system-level power management involves clock gating. Verify that the 15 pF maximum output load capability matches the PCB trace capacitance and input requirements of the destination device.

Oscillators Part Context

This component belongs to the EC2645 series of standard quartz crystal oscillators. It shares the same 5x7 mm ceramic SMD package and LVCMOS output characteristics as other variants in the family, such as the 37.5 MHz version. The series is designed for applications requiring reliable timing signals in compact electronic assemblies.

Oscillators Replacement Considerations

Direct substitutes include other 25 MHz LVCMOS oscillators in 5x7 mm packages with similar ±50 ppm stability and 3.3 V operation. Cross-reference pinouts carefully, particularly the tri-state enable function location. Verify thermal and electrical specifications match the original design constraints before substitution.

Oscillators FAQ

How is the tri-state function controlled?

Pin 1 controls the tri-state function. A voltage greater than or equal to 0.7Vdd enables the output, while a voltage less than or equal to 0.3Vdd disables it, placing the output in a high impedance state.

What does the ±50 ppm stability specification include?

The ±50 ppm maximum stability includes calibration tolerance at 25°C, frequency stability over the operating temperature range, supply voltage change, output load change, first-year aging at 25°C, shock, and vibration.