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Product Detailed Parameters
- Description：74.2 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：74.2 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 18QHTF21-74.200-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 74.2 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby function for power down capabilities. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports low-voltage operation with integrated standby mode
- Provides stable LVCMOS output signals
- Utilizes a leadless surface-mount package design
Applications
- General purpose clock generation
- Digital signal processing systems
- Communication equipment timing
Procurement Notes
Verify the specific ordering suffix to ensure compatibility with required voltage levels and output types. Confirm that the 4-SMD no-lead package dimensions align with the target PCB footprint. Cross-reference the part number against official manufacturer documentation to validate the 74.2 MHz frequency specification before integration into the design.
Selection Notes
Select this component when a 1.8V supply is available and LVCMOS interface compatibility is required. The standby feature makes it suitable for power-sensitive designs. Ensure the operating temperature range meets the environmental requirements of the final application. Verify that the leadless package type is supported by the assembly process.
Part Context
This model belongs to the Mercury Electronics series of quartz-based oscillators. The company has specialized in frequency control products since 1973. The 18QHTF21 series represents their standard XO offerings. These components are engineered for reliability in consumer and industrial electronics. The brand maintains a focus on precision timing solutions.
Replacement Considerations
Direct substitutes must match the 74.2 MHz frequency, 1.8V supply, and LVCMOS output. Compatible packages include 4-SMD no-lead configurations. Verify pinout compatibility and thermal characteristics. Consult manufacturer cross-reference lists for validated alternatives.
