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Product Detailed Parameters
- Description：77.125 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：77.125 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 18QHTF21-77.125-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 77.125 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Features integrated enable and disable control functionality
- Designed for low-voltage operation at 1.8V
Applications
- General purpose clock signal generation
- Digital circuit timing reference
- Embedded system clock sources
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD No Lead package footprint matches your PCB layout constraints to guarantee proper assembly and electrical connection.
Selection Notes
Select this component when a stable 77.125 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage as a primary constraint for power management. The enable/disable feature allows for dynamic power control, which is beneficial for battery-operated or energy-efficient designs requiring clock gating capabilities.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, characterized by small form factor SMD packages and LVCMOS outputs. The series supports various frequencies tailored for modern digital electronics. Mercury Electronics is a recognized manufacturer of frequency control products, emphasizing reliability in quartz-based timing solutions.
Replacement Considerations
Direct substitutes within the same series include other variants such as 18QHTF21-8.480-OE or 18QHTF21-44.200-OE, provided the frequency difference is acceptable for the application. Cross-referencing with other manufacturers' 4-SMD LVCMOS oscillators requires matching voltage, pinout, and frequency specifications.
