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Product Detailed Parameters
- Description：68.0 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 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 18QHTF21-68.000-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 68.0 MHz and utilizes LVCMOS output logic. The device requires a 3.3V supply voltage and features a power-down function for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise timing signals within low-power electronic systems.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated power-down capability for energy management
- Compact surface-mount package design
Applications
- Battery-powered portable devices
- General-purpose digital timing circuits
- Communication equipment clock sources
Procurement Notes
Verify the specific supply voltage requirement against system design specifications, as related models in this series may utilize different voltages such as 1.8V or 3.3V. Confirm that the 4-SMD no-lead package footprint matches the PCB layout constraints. Ensure the LVCMOS output level aligns with the receiving logic inputs to prevent signal integrity issues during operation.
Selection Notes
Select this component when a 68.0 MHz clock signal is required with low profile packaging. Consider the 3.3V operating voltage constraint relative to other available variants like the 1.8V versions. Evaluate the power-down feature necessity for standby current reduction in portable applications compared to continuous operation oscillators.
Part Context
This part belongs to the Mercury Electronics XO series, which includes various frequencies and voltage options. Similar parts include the 18QHTF21-68.665-PD and 18QHTF21-96.768-PD, differing primarily in frequency and potentially voltage levels. The manufacturer specializes in quartz crystals and timing solutions, providing standardized oscillator formats for industrial use.
Replacement Considerations
Direct substitutes may include other 68.0 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify pinout compatibility and electrical characteristics before substitution. Related Mercury parts like 3QHTF21-68.000-PD exist but differ in supply voltage requirements.
