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Product Detailed Parameters
- Description：6.912 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：6.912 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)：21mA
- 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 18QHTF21-6.912-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 6.912 MHz and utilizes an LVCMOS output signal format. The component is designed for low-voltage applications, featuring a supply voltage of 1.8V. It includes a power-down function accessible via a standby control input to minimize energy consumption when the device is not in active use. The physical package is a compact 4-SMD, No Lead configuration, suitable for surface-mount assembly on printed circuit boards.
Feature Summary
- Ultra-low power consumption with minimal standby power draw
- Integrated standby control for power-down functionality
- LVCMOS output interface compatible with digital logic circuits
Applications
- Battery-powered portable electronic devices
- Low-power consumer electronics systems
- Embedded timing references in mobile hardware
Procurement Notes
Verify the specific ordering suffix and frequency tolerance against the official datasheet before procurement. Confirm that the 4-SMD No Lead package dimensions match your PCB footprint requirements. Ensure the 1.8V supply voltage aligns with your system's power rail specifications. Check for any specific handling or storage conditions required for quartz components.
Selection Notes
Select this component when ultra-low power consumption is critical for battery life extension. The 1.8V operating voltage makes it suitable for modern low-voltage digital systems. The integrated standby feature allows for significant power savings during idle periods. Consider the 6.912 MHz frequency requirement for specific clock generation needs in communication or processing modules.
Part Context
This part belongs to the Mercury QHT series of surface-mount crystal oscillators. Mercury Electronics has been a pioneer in the Taiwan crystal industry since 1973, specializing in frequency control products including crystals, filters, and oscillators. The 18QHTF21 series represents their ultra-low power offerings designed for space-constrained and energy-sensitive applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's cross-reference guide for equivalent models with matching electrical characteristics and package dimensions.
