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Product Detailed Parameters
- Description：75.685 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：75.685 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 18QHTF21-75.685-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 75.685 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby function for power down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range of -40°C to 85°C and offers frequency stability of ±50ppm.
Feature Summary
- Supports low voltage operation at 1.8V
- Includes standby mode for power management
- Compact surface-mount package design
Applications
- Digital signal processing systems
- Communication equipment clocking
- Embedded system timing references
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail meets the current consumption specifications during active and standby states. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions precisely to avoid assembly issues. Cross-reference the datasheet for any specific soldering profile recommendations.
Selection Notes
Select this component when a precise 75.685 MHz reference is required for LVCMOS-compatible digital circuits. Consider the ±50ppm stability specification for applications sensitive to timing jitter. The 1.8V supply requirement makes it suitable for modern low-power portable devices. Evaluate the thermal performance within the -40°C to 85°C range for environmental compatibility.
Part Context
This oscillator belongs to the 18QHTF21 series from Mercury Electronics, designed for high-frequency applications. The series typically includes various frequencies and voltage options. The 'PD' suffix indicates the specific package and pin configuration variant. This model is part of a broader lineup of crystal oscillators used in consumer electronics and industrial controls.
Replacement Considerations
Check for direct substitutes with identical 75.685 MHz frequency and LVCMOS output. Verify compatible supply voltage and package dimensions for mechanical fit. Ensure equivalent frequency stability and temperature range specifications are met by alternative sources.
