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Product Detailed Parameters
- Description：6.76438 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：6.76438 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 18QHTF21-6.76438-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 6.76438 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.
Feature Summary
- Supports Enable/Disable functionality via standby mode
- Utilizes LVCMOS output interface for digital compatibility
- Designed for low-voltage operation at 1.8V
Applications
- Embedded systems requiring precise timing references
- Consumer electronics with space constraints
- Industrial control modules needing stable clock signals
Procurement Notes
Verify the specific suffix 'PD' confirms the presence of the power-down feature as distinct from standard variants. Ensure the 1.8V supply requirement aligns with the target system's voltage rails. Confirm the 2.0x1.6mm footprint matches the PCB layout specifications before finalizing procurement to avoid assembly issues.
Selection Notes
Select this component when a low-profile, 1.8V compatible oscillator with power management capabilities is required. The 6.76438 MHz frequency is suitable for specific clock generation needs. Consider the 4-SMD no-lead package for automated surface-mount assembly processes where board real estate is limited.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series offers various frequencies and packages, catering to diverse timing applications. Mercury Electronic Ind. Co., Ltd. is a Taiwan-based supplier established in 1973, focusing on frequency control products.
Replacement Considerations
Check for parts sharing the 18QHTF21 prefix or similar 2.0x1.6mm LVCMOS form factors. Verify that any substitute supports the same 1.8V supply and standby functionality. Cross-reference frequency stability and load capacitance requirements to ensure electrical compatibility.
