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Product Detailed Parameters
- Description：6.4 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：6.4 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 18QHTF21-6.400-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 6.4 MHz and utilizes LVCMOS output logic for digital interfacing. The device requires a 1.8V supply voltage and features a power-down function to reduce consumption during standby modes. Maximum supply current is specified at 21mA. The component is housed in a compact 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm. It is designed for operation within standard industrial temperature ranges.
Feature Summary
- Integrated power-down capability for energy efficiency
- LVCMOS output logic compatibility
- Compact surface-mount packaging
Applications
- Battery-powered portable electronic devices
- Digital signal processing systems
- Communication equipment requiring precise timing
Procurement Notes
Verify the specific ordering suffix against official Mercury Electronics documentation to ensure correct voltage and package specifications. Confirm that the LVCMOS output type matches system interface requirements. Check datasheet details for absolute pull range and operating temperature limits before integration. Ensure supply voltage stability aligns with the 1.8V requirement to maintain oscillator performance and reliability.
Selection Notes
Select this component when a low-voltage 6.4 MHz clock source is required for space-constrained designs. The 1.8V supply and power-down feature make it suitable for battery-operated applications where energy conservation is critical. Verify that the 4-SMD footprint fits the PCB layout constraints. Consider the maximum supply current of 21mA for power budget calculations and thermal management planning.
Part Context
This part belongs to the Mercury Electronic XO series, which provides various frequency options in standardized packages. Mercury Electronics is a Taiwan-based manufacturer specializing in quartz crystals and oscillators. The 18QHTF21 series offers different frequencies while maintaining consistent electrical characteristics and form factors across the product line.
Replacement Considerations
Direct substitutes include other 6.4 MHz LVCMOS oscillators in 3.2x2.5mm SMD packages from compatible manufacturers. Verify pinout compatibility and voltage levels before substitution. Cross-reference with Mercury's own variants such as 18QHTF21-8.0004-PD for different frequencies if applicable.
