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Product Detailed Parameters
- Description：8.6436 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：8.6436 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)：21mA
- 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 18QHTF21-8.6436-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd., operating at a fixed frequency of 8.6436 MHz. It utilizes LVCMOS output logic and supports a supply voltage range of 1.8V. The device features an active-low enable/disable control function via the OE pin, allowing for power management in embedded systems. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, designed for surface-mount applications requiring precise clock signals.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Active-low enable/disable control via OE pin
- Compact 4-SMD no-lead surface mount package
Applications
- Embedded system clock generation
- Digital signal processing timing references
- Communication module synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues. Check for any specific reflow soldering profile recommendations provided in the official datasheet to maintain component integrity during manufacturing.
Selection Notes
Select this component when a precise 8.6436 MHz clock source is required with low power consumption capabilities. The integrated enable/disable feature makes it suitable for battery-operated devices where power efficiency is critical. Consider the small form factor if space constraints are a primary design driver. Ensure the LVCMOS output swing is compatible with the input thresholds of the downstream logic circuits to guarantee reliable signal transmission.
Part Context
This part belongs to Mercury's QuikXO series, which specializes in fast-delivery CMOS output clock oscillators. The series includes both standard and custom frequency options, built to order to meet specific customer needs. Mercury Electronic Ind. Co. Ltd. has a long history in quartz crystal manufacturing, positioning this oscillator within a lineage of established frequency control products known for reliability and precision in various electronic applications.
Replacement Considerations
Direct substitutes include other models from the same QuikXO series with identical package dimensions and LVCMOS outputs, such as the 18QHTF21-8.640-OE or 18QHTF21-37.888-OE, provided the frequency difference is acceptable for the application. Verify that any replacement maintains the 1.8V supply requirement and enable/disable functionality to ensure seamless integration without redesigning the surrounding circuitry.
