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Product Detailed Parameters
- Description：6.4983 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：6.4983 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 18QHTF21-6.4983-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 6.4983 MHz with LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby (power down) function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The component is designed for operation within an industrial temperature range of -40°C to 85°C.
Feature Summary
- Integrated standby mode for power management
- LVCMOS output compatibility
- Compact surface-mount form factor
Applications
- General purpose digital timing circuits
- Embedded system clock sources
- Consumer electronics control boards
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits defined in the official datasheet. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to prevent assembly issues during manufacturing.
Selection Notes
Select this component when a low-voltage 1.8V oscillator is required for space-constrained designs. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the operating temperature range of -40°C to 85°C to ensure reliability in varying environmental conditions compared to commercial grade alternatives.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. The series offers various frequencies and voltage options, typically utilizing quartz resonator technology for precise timing. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from continuous-operation variants within the same physical package family.
Replacement Considerations
Direct replacements must match the 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify frequency stability and pinout compatibility. Cross-reference with other manufacturers offering similar SMD oscillators, ensuring identical electrical characteristics and thermal ratings are maintained.
