18QHTF21-3.996-PD

Oscillators Overview

The 18QHTF21-3.996-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 3.996 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications with a supply voltage of 1.8V. It features a standby function, allowing for power down control to reduce energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface mount assembly.

Oscillators Feature Summary

• LVCMOS output logic for standard digital interface compatibility
• Integrated standby mode enabling power down functionality
• Compact 4-SMD no-lead surface mount package design

Oscillators Applications

• General purpose timing circuits requiring low power consumption
• Embedded systems utilizing 1.8V logic levels
• Portable electronic devices with space constraints

Oscillators Procurement Notes

Verify the specific ordering suffix PD against the manufacturer's current datasheet to confirm the presence of the standby feature. Ensure that the 1.8V supply voltage aligns with the target system's power rails. Confirm the 4-SMD package footprint matches the PCB layout requirements before finalizing procurement orders.

Oscillators Selection Notes

Select this component when a low-frequency reference clock is required for 1.8V logic systems. The standby capability makes it suitable for battery-operated applications where power efficiency is critical. Ensure the application does not require differential outputs or higher voltage operation, as this model is strictly single-ended LVCMOS.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small form-factor oscillators. The series typically offers various frequencies within the same physical footprint. The PD suffix indicates specific pinout or functional variations compared to other suffixes like OE, which may offer enable/disable controls instead of standby.

Oscillators Replacement Considerations

Direct replacements must match the 3.996 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify if the substitute supports the standby function; otherwise, ensure the circuit can tolerate continuous operation.