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Product Detailed Parameters
- Description：13.478 MHz XO 1.8V 2.0X1.6 MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：13.478 MHz
- Function：Enable/Disable
- 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)：22mA
- 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 18QHTF21-13.478-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.478 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated enable/disable control functionality
- 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 frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your power management architecture. Ensure the 4-SMD footprint matches your PCB layout constraints. Cross-reference the datasheet for operating temperature ranges to guarantee reliability under your environmental conditions.
Selection Notes
Select this component when a low-voltage LVCMOS clock source is required for space-constrained designs. The enable/disable feature allows for power management optimization. Consider the 13.478 MHz frequency suitability for your data rates. Evaluate the thermal performance within the specified operating range. Compare package dimensions against available board real estate.
Part Context
This part belongs to Mercury Electronics' SMD oscillator series, specifically the H21 or similar family indicated by the model prefix. These oscillators are designed for high-reliability timing applications. The manufacturer specializes in quartz-based frequency control products, including crystals, filters, and various oscillator types like TCXO and VCTCXO.
Replacement Considerations
Direct substitutes may include other 13.478 MHz LVCMOS oscillators in 4-SMD packages from manufacturers such as Epson, Seiko Epson, or SiTime. Verify pinout compatibility and electrical parameters. Check for equivalent enable/disable functionality if required. Ensure the replacement meets the same temperature and voltage specifications.
