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Product Detailed Parameters
- Description：68.75 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：68.75 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 18QHTF21-68.750-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 68.75 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm. A key functional characteristic is the inclusion of a standby or power-down mode capability, allowing for energy management in portable systems.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby (power down) functionality for power management
- Utilizes a compact 4-SMD no-lead surface mount package
Applications
- Portable electronic devices requiring low power consumption
- Communication equipment utilizing clock synchronization
- Embedded systems with limited voltage supply constraints
Procurement Notes
Verify that the specific part number matches the required frequency and voltage specifications before procurement. Confirm that the 4-SMD no-lead package type aligns with the target PCB footprint design. Ensure that the LVCMOS output logic level is compatible with the receiving circuitry inputs to prevent signal integrity issues.
Selection Notes
Select this component when a precise 68.75 MHz clock source is required within a constrained physical space. The 1.8V operating voltage makes it suitable for modern low-power digital circuits. Consider the standby feature if system power efficiency is a critical design parameter compared to continuously running oscillators.
Part Context
This oscillator belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer has extensive experience in quartz crystal production. This specific model represents a small-form-factor option within their portfolio of surface-mount clock generators.
Replacement Considerations
Direct substitutes must match the 68.75 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package dimensions. Verify pinout compatibility and electrical characteristics before swapping components.
