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Product Detailed Parameters
- Description：74.99 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：74.99 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 18QHTF21-74.990-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 74.99 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, 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 stable timing signals.
Feature Summary
- Provides stable clock signals at 74.99 MHz using LVCMOS logic
- Operates on a single 1.8V power supply for low energy usage
- Includes hardware enable and disable functionality for power management
- Utilizes a small 4-SMD no-lead surface mount package
Applications
- Clock generation for embedded microprocessors
- Timing reference for communication interfaces
- Power management systems requiring standby control
- Consumer electronics with size constraints
Procurement Notes
Verify the specific suffix 'OE' indicates the Enable/Disable feature rather than 'PD' for Power Down. Confirm the operating temperature range and load capacitance requirements match the target circuit design. Ensure the 1.8V supply voltage aligns with the system's power rails to prevent logic level incompatibility or damage.
Selection Notes
Choose this model when a 74.99 MHz frequency is required alongside active power control capabilities. The LVCMOS output is suitable for standard digital logic families. Consider the 1.8V supply constraint and the physical footprint of the 4-SMD package during PCB layout planning to ensure compatibility with existing board space and voltage domains.
Part Context
Mercury Electronic Ind. Co., Ltd. specializes in frequency control products including quartz crystals and oscillators. The 18QHTF series represents their line of surface-mount crystal oscillators. This specific part number belongs to the standard XO category, offering reliable timing solutions for various electronic applications requiring precise frequency stability.
Replacement Considerations
The 18QHTF21-74.990-PD is a related variant from the same manufacturer but features Standby (Power Down) functionality instead of Enable/Disable. Verify that the control signal logic matches the replacement part's specification before substitution.
