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Product Detailed Parameters
- Description：68.1818 MHz XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.1818 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 18QHTF21-68.1818-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 68.1818 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and features an enable/disable control interface for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- Standard XO configuration with LVCMOS output
- 1.8V operating voltage with enable/disable control
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing systems
- Communication equipment timing
- Embedded microcontroller clock sources
Procurement Notes
Verify the exact part number suffix against official Mercury Electronics documentation to confirm specific tolerance and temperature range specifications. Ensure compatibility with 1.8V logic levels and 4-SMD footprint dimensions during integration. Cross-reference datasheet parameters for frequency stability requirements before procurement.
Selection Notes
Select this component when a 68.1818 MHz reference is required with low voltage operation. Consider the enable/disable feature for power-sensitive designs. Verify that the LVCMOS output swing matches the receiving circuit input thresholds. Confirm the 4-SMD package size fits the available PCB real estate constraints.
Part Context
This model belongs to the Mercury Electronics 18QHTF21 series of surface-mount oscillators. The series typically offers standard frequency options with LVCMOS outputs. The -OE suffix likely denotes specific packaging or testing configurations as defined by the manufacturer's internal coding system for this product line.
Replacement Considerations
Direct substitutes must match the 68.1818 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics with alternative manufacturers' equivalent parts before substitution.
