18QHTF21-49.5333-PD

Oscillators Overview

The 18QHTF21-49.5333-PD is a standard frequency crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 49.5333 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a dedicated standby or power-down mode. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component serves as a precise clock source for digital circuits requiring stable timing signals.

Oscillators Feature Summary

• Provides stable clock generation at 49.5333 MHz using LVCMOS logic levels
• Operates on a single 1.8V supply voltage for energy efficiency
• Includes a standby or power-down function to reduce active consumption
• Utilizes a small 4-SMD no-lead surface mount package for space-constrained designs

Oscillators Applications

• Clock signal generation for microprocessors and microcontrollers
• Timing reference for communication interfaces
• Synchronization sources for digital logic circuits
• Power-sensitive portable electronic devices

Oscillators Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the specified tolerance to ensure reliable oscillator performance. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions precisely to avoid soldering defects during assembly.

Oscillators Selection Notes

Select this component when a low-voltage, small-footprint clock source is required for 49.5333 MHz applications. Consider the LVCMOS output compatibility with downstream logic families. Evaluate the power-down feature if battery life or thermal management is a critical constraint in the system architecture compared to continuous-operation alternatives.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies and supply voltages, catering to diverse embedded system needs. The 18QHTF21 variant specifically targets low-voltage applications, distinguishing it from higher-voltage counterparts in the manufacturer's broader oscillator portfolio.

Oscillators Replacement Considerations

Direct substitutes include other 49.5333 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson, NDK, or SiTime. Verify pinout compatibility and electrical specifications, particularly supply voltage and output swing, before swapping components.

Oscillators FAQ

What is the output logic type of the 18QHTF21-49.5333-PD?

The component uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic.

Does this oscillator support a power-saving mode?

Yes, the device features a standby or power-down mode to reduce power consumption when not in use.