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Product Detailed Parameters
- Description：66.4429 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：66.4429 MHz
- Function：Standby (Power Down)
- 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 18QHTF21-66.4429-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 66.4429 MHz and utilizes an LVCMOS output interface. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- LVCMOS output interface for digital logic compatibility
- Integrated standby mode for power reduction
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing systems
- Communication equipment timing
- Embedded control circuits
Procurement Notes
Verify the specific ordering suffix and frequency tolerance against project requirements. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD footprint matches the PCB layout design. Check for RoHS compliance status if required by environmental regulations. Validate the manufacturer source to ensure genuine components.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS output. The small 4-pin SMD form factor makes it appropriate for space-constrained designs. Consider the standby feature if power efficiency during idle states is a priority. Ensure the 66.4429 MHz frequency meets the specific clocking needs of the application.
Part Context
Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in quartz crystals and oscillators. The company has decades of experience in frequency control products. This model belongs to their series of standard XO devices designed for general-purpose electronic applications requiring stable clock signals.
Replacement Considerations
Cross-reference with other 66.4429 MHz LVCMOS oscillators in 4-SMD packages. Verify pinout compatibility and voltage levels before substitution. Check datasheet specifications for equivalent performance metrics.
