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Product Detailed Parameters
- Description：74.963397 M XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：74.963397 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 18QHTF21-74.963397-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 74.963397 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features an Enable/Disable control pin for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for operation within standard industrial temperature ranges.
Feature Summary
- Integrates LVCMOS output interface for digital circuit compatibility
- Includes enable/disable functionality for efficient power management
- Utilizes quartz-based resonance for stable frequency generation
Applications
- Data communication equipment signal timing
- Consumer electronics clock reference sources
- Industrial control system synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Check the datasheet for reflow soldering profile recommendations to prevent thermal damage during assembly processes.
Selection Notes
Select this component when a precise 74.963397 MHz clock source is required for low-voltage digital interfaces. The LVCMOS output level is suitable for direct interfacing with standard logic families without additional buffering. The enable pin allows for dynamic power saving in battery-operated devices. Consider the small form factor for space-constrained mobile or handheld applications requiring reliable timing references.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies with standardized 2.0x1.6mm packages. These components are designed to replace larger through-hole crystals or older oscillator formats in modern miniaturized electronic designs, providing integrated stability and ease of automated assembly.
Replacement Considerations
Direct substitutes include other 18QHTF21 series variants with identical pinouts but different frequencies, such as 18QHTF21-74.250-OE, if frequency adjustment is permissible. Cross-brand replacements must match the 4-SMD no-lead package, 1.8V supply, LVCMOS output, and 74.963397 MHz frequency exactly to ensure functional compatibility.
