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Product Detailed Parameters
- Description：68.08 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：68.08 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 18QHTF21-68.080-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind., Co., Ltd. It operates at a nominal frequency of 68.08 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an Enable/Disable control function via the OE suffix. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise clock source for digital circuits requiring low power consumption and small form factor integration.
Feature Summary
- Integrates Enable/Disable functionality for active power management
- Utilizes LVCMOS output logic for standard digital interface compatibility
- Designed in a compact 4-SMD no-lead surface mount package
Applications
- Portable electronic devices requiring low power operation
- Embedded systems needing precise clock synchronization
- Consumer electronics utilizing standard LVCMOS interfaces
Procurement Notes
Verify the specific ordering suffix 'OE' to confirm the presence of the Enable/Disable pin functionality, as this alters the control logic compared to standard variants. Ensure the supply voltage matches the 1.8V requirement. Confirm the package footprint corresponds to the 2.0x1.6mm SMD dimensions before finalizing procurement orders to avoid assembly mismatches.
Selection Notes
Select this component when both low voltage operation and power-down capabilities are required. The 1.8V specification limits suitability for 3.3V-only systems unless level shifting is employed. The Enable/Disable feature adds design complexity but offers energy savings. Compare against the -PD variant if Power Down is preferred over Enable/Disable control schemes.
Part Context
This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series typically includes variants with different frequencies, voltages, and control functions such as Power Down (-PD) or Enable/Disable (-OE). The 18 prefix generally indicates the 1.8V supply voltage class within the manufacturer's product line.
Replacement Considerations
The 18QHTF21-68.080-PD is a functional substitute with identical electrical parameters but uses Power Down instead of Enable/Disable control. Cross-reference other 18QHTF21 variants for frequency adjustments if system requirements change.
