18QHTF21-4.640-PD

Oscillators Overview

The 18QHTF21-4.640-PD is a quartz crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 4.64 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (PD) control function to manage standby states. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range typical for industrial applications and complies with RoHS standards.

Oscillators Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Includes power-down control functionality for energy-efficient standby operation
• Utilizes a low-profile surface-mount package for space-constrained designs

Oscillators Applications

• General-purpose clock signal generation in embedded systems
• Timing reference sources for microcontrollers and processors
• Digital communication interfaces requiring stable frequency references

Oscillators Procurement Notes

Verify the specific suffix PD indicates the power-down feature when sourcing replacements. Confirm the 1.8V supply voltage requirement matches the target circuit design. Ensure the 4-SMD no-lead package footprint aligns with the PCB layout specifications. Check RoHS compliance status if environmental regulations apply to the end product.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V oscillator with power management capabilities is required. The 4.64 MHz frequency suits specific timing or baud rate requirements. Consider the small 2.0x1.6mm package size for dense board layouts. LVCMOS output ensures direct interfacing with standard logic families without additional level shifting.

Oscillators Part Context

This part belongs to the QHTF series of quartz crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The 18QHTF21 variant specifically denotes the 1.8V supply and 4.64 MHz frequency configuration. The manufacturer has a history of producing quartz components, emphasizing reliability in timing solutions.

Oscillators Replacement Considerations

Compatible substitutes include other 4.64 MHz LVCMOS oscillators with 1.8V supply and power-down features. Verify pinout compatibility and package dimensions before substitution. Ensure equivalent frequency stability and phase noise specifications are met for the application.