18QHTF21-77.570634-OE

Overview

The 18QHTF21-77.570634-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 77.570634 MHz and utilizes LVCMOS output logic. The component requires a 1.8V supply voltage and features enable/disable control functionality. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• LVCMOS output logic for digital signal compatibility
• Integrated enable and disable control capability
• Compact 4-SMD surface-mount package design

Applications

• General purpose clock generation in embedded systems
• Timing reference for microprocessors and FPGAs
• Communication interface synchronization circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator specifications. Confirm that the 4-SMD footprint matches your PCB layout constraints. Cross-reference the OE suffix with manufacturer documentation to confirm availability and exact electrical parameters.

Selection Notes

Select this component when a precise 77.570634 MHz timing source is required for low-voltage digital logic. The LVCMOS output is suitable for direct interfacing with standard CMOS inputs. Consider the enable/disable feature if power management or clock gating is necessary for the application. Verify temperature range compliance for the intended operating environment.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies with standardized 2.0x1.6mm packages. These oscillators are designed for applications requiring stable clock signals in space-constrained electronic devices. The series typically supports LVCMOS outputs and low voltage operation.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with different frequencies but identical pinouts and electrical characteristics, such as 18QHTF21-75.630-OE or 18QHTF21-50.256-OE, provided the frequency difference is acceptable for the system design.