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Product Detailed Parameters
- Description：68.667 MHz XO 1.8V 2.0X1.6 MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.667 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 18QHTF21-68.667-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 68.667 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) mode capability. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports Low Voltage CMOS (LVCMOS) output logic levels
- Includes Standby or Power Down functionality for energy management
- Utilizes a leadless 4-SMD surface-mount package design
Applications
- General purpose clock signal generation
- Embedded system timing references
- Digital circuit synchronization
Procurement Notes
Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply rail stability meets the oscillator's jitter specifications. Ensure the PCB layout adheres to the manufacturer's recommended footprint guidelines for the 4-SMD no-lead package to maintain signal integrity.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside LVCMOS compatibility. The inclusion of a standby mode makes it suitable for battery-powered or power-sensitive designs. Consider the 4-SMD no-lead form factor for space-constrained layouts where traditional leaded packages are unsuitable.
Part Context
This model belongs to the QHTF series of standard oscillators from Mercury Electronic Ind. Co., Ltd. The series typically offers various frequencies and voltage options. Mercury Electronics is a specialized manufacturer of frequency control products with a long history in quartz crystal production, providing components for industrial and consumer electronics markets.
Replacement Considerations
Direct substitutes include other 1.8V LVCMOS oscillators in 4-SMD no-lead packages with similar frequency accuracy. Verify pinout compatibility and thermal characteristics when replacing. Cross-reference part numbers such as those from the same manufacturer family if available.
