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Product Detailed Parameters
- Description：68.1818 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.1818 MHz
- Function：Standby (Power Down)
- Output：LVCMOS
- Voltage - Supply：1.8V
- Frequency Stability：±50ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 85°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：26mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.079" L x 0.063" W (2.00mm x 1.60mm)
- Height - Seated (Max)：0.031" (0.80mm)
- Supplier Device Package：-
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Overview
The 18QHTF21-68.1818-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 68.1818 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability 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 frequency generation with low power consumption.
Feature Summary
- Supports standby mode for power reduction
- Compact surface-mount form factor
- LVCMOS output interface
Applications
- Precision clock generation systems
- Low power electronic circuits
- Frequency reference sources
Procurement Notes
Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB design constraints. Cross-reference the part number suffix to confirm the exact frequency tolerance and stability specifications required for the application.
Selection Notes
Select this oscillator when a stable 68.1818 MHz reference is needed in a minimal footprint. The LVCMOS output simplifies interfacing with digital logic. Consider the power-down feature if battery life or thermal management is critical. Compare against other Mercury models in the 18QHTF series for alternative frequencies or voltage levels.
Part Context
This component belongs to the 18QHTF series of standard XO oscillators from Mercury Electronic Ind., Co., Ltd. The series offers various frequencies and voltages in a consistent 2.0x1.6mm package. Mercury has a long history in quartz crystal manufacturing, providing reliable frequency control products.
Replacement Considerations
Check Mercury part numbers such as 18QHTF21-68.080-PD or 18QHTF21-96.768-PD for different frequencies within the same package. Verify compatibility with other manufacturers' 4-SMD LVCMOS oscillators offering similar size and voltage specs.
