18QHTF21-28.900-PD

Oscillators Overview

The 18QHTF21-28.900-PD is an active crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 28.9 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals in low-power electronic systems.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital interface compatibility
• Includes standby mode to reduce power consumption during idle periods
• Compact surface-mount design suitable for space-constrained PCB layouts

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Consumer electronics requiring low-power oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 2.0x1.6mm footprint matches your PCB silkscreen and pad layout. Check for any specific operating temperature range limitations required by your application environment.

Oscillators Selection Notes

Select this model when a 28.9 MHz clock signal is specifically required. Consider the LVCMOS output level if interfacing with 1.8V logic families. The integrated power-down feature makes it suitable for battery-operated devices. Evaluate the small form factor against available board space constraints compared to larger oscillator packages.

Oscillators Part Context

This part belongs to the 18QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and supply voltages. The 'PD' suffix typically indicates the presence of a power-down control pin or functionality. These components are widely used in portable electronics and industrial controls where size and power efficiency are critical factors.

Oscillators Replacement Considerations

Direct replacements must match the 28.9 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility, especially regarding the power-down control if utilized. Cross-reference with other Mercury models like the 18QHTF57 series only if package size permits.