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Product Detailed Parameters
- Description：64.3 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：64.3 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 18QHTF21-64.300-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 64.3 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby (power down) function to reduce power consumption when not in use. The component is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm. This series is characterized by its small form factor and low voltage operation, suitable for space-constrained electronic designs.
Feature Summary
- Supports LVCMOS output logic for standard digital interface compatibility
- Includes standby mode functionality for power management
- Utilizes a compact 4-SMD no-lead surface mount package
Applications
- General purpose clock signal generation
- Digital circuit timing references
- Embedded system clock sources
Procurement Notes
Verify the specific ordering suffix and frequency tolerance against the project requirements before purchase. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD package footprint matches the PCB layout design. Check for any specific handling or storage instructions provided in the manufacturer datasheet to maintain component integrity during assembly.
Selection Notes
Select this component when a low-profile, 1.8V compatible oscillator is required for 64.3 MHz applications. Consider the LVCMOS output level compatibility with downstream logic families. Evaluate the thermal and mechanical constraints of the 2.0x1.6mm package within the enclosure. Compare power consumption in active versus standby modes if battery life is a critical design parameter.
Part Context
This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options, typically featuring small footprints like 2.0x1.6mm. These components are designed to replace larger through-hole crystals or older oscillator technologies in modern portable and high-density electronics.
Replacement Considerations
Direct replacements must match the 64.3 MHz frequency, 1.8V supply, and LVCMOS output. Verify pinout compatibility for the 4-SMD no-lead package. Cross-reference with other manufacturers offering similar 2.0x1.6mm oscillators if availability is an issue.
