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Product Detailed Parameters
- Description：68.68 MHz XO 1.8V 2.0X1.6 MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.68 MHz
- Function：Enable/Disable
- 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 18QHTF21-68.680-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 68.680 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated enable/disable control functionality
- Compact 4-SMD no-lead surface mount package
Applications
- General purpose clock signal generation
- Digital circuit timing reference
- Embedded system clock sources
Procurement Notes
Verify the specific operating temperature range and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your power architecture. Ensure the 4-SMD footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a 68.680 MHz clock source is required with low-voltage operation. The LVCMOS interface suits standard digital logic families. Consider the enable pin if power management or clock gating is necessary. Verify the package dimensions fit within the available board space compared to larger oscillator packages.
Part Context
This part belongs to the QHTF series of standard oscillators from Mercury Electronics. The series offers various frequencies and voltages. The '18' prefix indicates the 1.8V supply variant. The 'OE' suffix typically denotes a specific tape-and-reel packaging option for automated assembly processes.
Replacement Considerations
Direct substitutes include other 68.680 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD no-lead footprints. Compatible alternatives must match the enable/disable pin configuration and output swing levels to ensure seamless integration without schematic modifications.
