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Product Detailed Parameters
- Description：68.18181 MHz XO 1.8V 2.0X1.6 OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：68.18181 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 18QHTF21-68.18181-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 68.18181 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an Enable/Disable control function. It is housed in a compact 4-SMD package with no lead, measuring 2.0x1.6 mm. This component serves as a precise timing source for digital circuits requiring low-power operation and size-constrained layouts.
Feature Summary
- Integrates Enable/Disable functionality for power management
- Utilizes LVCMOS output logic for digital compatibility
- Compact 4-SMD no-lead surface mount package
Applications
- Portable electronic devices requiring low power consumption
- Communication modules needing precise clock signals
- Embedded systems with space-constrained PCB layouts
Procurement Notes
Verify the specific ordering suffix to confirm the enable/disable feature and voltage level. Ensure the package dimensions match the target footprint. Confirm the operating temperature range meets system requirements. Cross-reference the datasheet for load capacitance specifications. Validate the manufacturer's authenticity through authorized channels.
Selection Notes
Choose this model when a 1.8V supply and small form factor are required. Consider the Enable/Disable pin if power cycling is necessary. Compare against similar Mercury models like the PD variant if standby current differs. Ensure the LVCMOS output aligns with the receiving logic levels. Verify availability of the OE suffix for active control capabilities.
Part Context
This part belongs to Mercury Electronics' QHTF series of surface-mount oscillators. The series offers various frequencies and voltages. The 'OE' suffix typically denotes the Enable/Disable option. Mercury provides these components for timing applications in consumer and industrial electronics. The brand has a long history in quartz crystal manufacturing.
Replacement Considerations
Direct substitutes include other Mercury parts with identical electrical specs. Check the 18QHTF21-68.18181-PD for similar performance without enable control. Verify pinout compatibility before swapping. Ensure the replacement supports the same LVCMOS logic family.
