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Product Detailed Parameters
- Description：74.929 MHz XO 1.8V 2.0X1.6 MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：74.929 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 18QHTF21-74.929-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 74.929 MHz with an LVCMOS output signal. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.
Feature Summary
- Supports standby mode for power management
- Utilizes LVCMOS output interface
- Compact surface-mount design
Applications
- General clock generation
- Digital signal processing systems
- Communication equipment timing
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a precise 74.929 MHz clock source is required for low-voltage digital circuits. Consider the LVCMOS compatibility with downstream logic levels. Evaluate the thermal performance and power consumption characteristics relative to other oscillators in the same series to ensure optimal system efficiency and reliability under varying environmental conditions.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in producing crystals and oscillators. This series typically offers standard specifications suitable for various consumer and industrial electronics applications requiring reliable timing signals.
Replacement Considerations
Direct substitutes include other 74.929 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical parameters such as phase noise and jitter before swapping. Cross-reference with similar models from the same manufacturer or other qualified suppliers ensuring identical form factor and functional requirements.
