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Product Detailed Parameters
- Description：1.9521 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：1.9521 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 18QHTF21-1.9521-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.9521 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- LVCMOS output interface for digital logic compatibility
- Integrated standby mode to reduce power consumption
- Compact 4-SMD no-lead surface mount package
Applications
- Battery-powered portable electronic devices
- Low-power embedded systems
- Digital signal processing circuits
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge protection during assembly.
Selection Notes
Select this component when a low-frequency, low-power clock source is required for LVCMOS-compatible digital circuits. The integrated standby feature makes it suitable for applications where power efficiency is critical. Consider the 1.8V operating voltage to ensure compatibility with modern low-voltage logic families. The small form factor aids in dense board layouts.
Part Context
Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in frequency control products, including quartz crystals, oscillators, and filters. This part belongs to their line of standard XO oscillators designed for general-purpose timing applications. The company has a long history in the quartz industry, providing reliable timing solutions for various electronic sectors.
Replacement Considerations
Consult official distributor databases for direct cross-reference part numbers from Mercury Electronics or other manufacturers offering compatible 1.9521 MHz LVCMOS oscillators in 4-SMD packages. Verify electrical parameters such as supply voltage, current consumption, and output waveform before substitution.
