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Product Detailed Parameters
- Description：64.9505 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：64.9505 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 18QHTF21-64.9505-PD is a 64.9505 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a Standby (Power Down) control function and is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.
Feature Summary
- LVCMOS output logic for standard digital interface compatibility
- Integrated standby mode for power management
- Compact surface-mount form factor
Applications
- General purpose clock generation
- Digital signal processing timing
- Embedded system synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a precise 64.9505 MHz reference is required for low-voltage digital circuits. The choice depends on the necessity for LVCMOS outputs and the availability of a 1.8V power supply. Consider the physical space constraints due to the small 2.0x1.6 mm package size and the need for power-down functionality in battery-operated or energy-efficient designs.
Part Context
This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series is characterized by its small footprint and low voltage operation. Mercury Electronics is a Taiwan-based manufacturer specializing in frequency control products, including quartz crystals and various oscillator types, established since 1973.
Replacement Considerations
Direct substitutes within the same series include parts with identical package and voltage but different frequencies, such as 18QHTF21-51.200-PD or 18QHTF21-15.700-PD. Cross-referencing with other manufacturers requires matching the LVCMOS output, 1.8V supply, and 4-SMD no-lead package dimensions.
