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Product Detailed Parameters
- Description：68.695 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：68.695 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 18QHTF21-68.695-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 68.695 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features enable/disable functionality for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range of -40°C to 85°C and offers frequency stability of ±50ppm.
Feature Summary
- LVCMOS output interface with enable/disable control
- Compact 4-SMD no-lead surface mount package
- Wide industrial operating temperature range
Applications
- General purpose clock signal generation
- Embedded system timing references
- Consumer electronics circuit boards
Procurement Notes
Verify the specific ordering suffix matches the required voltage and frequency parameters. Confirm the package type corresponds to the PCB footprint requirements. Ensure the manufacturer designation aligns with the intended supply chain sources. Cross-reference the part number against official distributor catalogs to confirm current availability status and authenticity before finalizing procurement orders.
Selection Notes
Select this component when a low-voltage 1.8V operation is required for space-constrained designs. The small 2.0x1.6mm footprint makes it suitable for high-density layouts. Consider the ±50ppm stability specification against system timing requirements. Verify compatibility with LVCMOS logic levels used in the target microcontroller or FPGA interfaces.
Part Context
This oscillator belongs to the QHTF series from Mercury Electronics, designed for general-purpose applications. The series includes various frequencies and voltage options within similar physical footprints. Mercury Electronics is a established manufacturer of frequency control products with a history dating back to 1973 in Taiwan.
Replacement Considerations
Direct substitutes include other 68.695 MHz LVCMOS oscillators in 4-SMD packages with 1.8V supply. Check pinout compatibility and electrical specifications carefully. Alternative models may require verification of enable pin functionality and thermal performance.
