18QHTF21-35.251-OE

Oscillators Overview

The 18QHTF21-35.251-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 35.251 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an Enable/Disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable functionality for power management
• Compact 4-SMD no-lead surface mount package

Oscillators Applications

• General clock signal generation in electronic circuits
• Timing reference for low-voltage digital systems
• Embedded devices requiring precise frequency control

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Cross-reference the manufacturer datasheet for detailed electrical characteristics to guarantee operational reliability.

Oscillators Selection Notes

Select this component when a 35.251 MHz timing source is required for 1.8V logic families. The LVCMOS output ensures direct interfacing with microcontrollers or FPGAs without additional level shifting. The enable pin allows for dynamic power control, making it suitable for battery-operated applications. Verify thermal performance within the specified operating temperature range.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series offers various frequencies in a small form factor. Mercury Electronic has a long history in Taiwan manufacturing frequency control products, including TCXOs and VCTCXOs. This specific model represents a standard XO variant optimized for space-constrained designs.

Oscillators Replacement Considerations

Compatible substitutes include other 35.251 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers like Epson, Nihon Dempa Kogyo, or SiTime. Ensure the replacement maintains the same supply voltage, output logic type, and pinout configuration. Verify that the new component meets the same frequency stability and phase noise specifications.