18QHTF21-27.270-PD

Oscillators Overview

The 18QHTF21-27.270-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 27.27 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface for digital circuit compatibility
• Integrated standby mode for power reduction
• Compact 4-SMD no-lead surface mount package

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded controller clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design specifications. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues. Cross-reference the datasheet for operating temperature range limitations.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V clock source is required for space-constrained designs. The LVCMOS output is suitable for standard digital logic families. Consider the power-down feature if battery life or thermal management is a priority. Verify that the 27.27 MHz frequency meets the system clock requirements without additional dividers.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The '18' prefix typically indicates the 1.8V supply voltage capability, while 'QHTF21' denotes the specific package and performance class. The '-PD' suffix confirms the inclusion of a power-down pin or function, distinguishing it from continuous-operation variants within the same form factor.

Oscillators Replacement Considerations

Direct substitutes must match the 27.27 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm 4-SMD package. Verify equivalent jitter and stability specifications before substitution. Check if alternative manufacturers offer compatible pinouts and electrical characteristics for seamless integration.