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Product Detailed Parameters
- Description：115.981982 M XO 1.8V 2.0X1.6 OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：115.981982 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)：28mA
- 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 18QHTF21-115.981982-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 115.981982 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features an enable/disable control function for power management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm. This component is designed for high-frequency signal generation in electronic circuits requiring precise timing.
Feature Summary
- LVCMOS output logic interface
- Enable/Disable control functionality
- Compact 4-SMD surface mount package
Applications
- High-speed digital signal processing systems
- Communication equipment clock sources
- Embedded system timing references
Procurement Notes
Verify the exact frequency tolerance and load capacitance requirements against your circuit design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliability.
Selection Notes
Select this oscillator when a precise 115.981982 MHz frequency is required with low-voltage operation. Consider the LVCMOS output compatibility with your downstream logic devices. Evaluate the need for enable/disable control for power efficiency in battery-operated or standby-sensitive applications. Compare package size constraints against available board space.
Part Context
This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltages, typically utilizing quartz resonators for stability. Mercury Electronics has a long history in frequency control products, positioning this component as a reliable timing solution for modern electronics requiring small form factors and stable performance.
Replacement Considerations
Direct substitutes may include other 115.981982 MHz LVCMOS oscillators in 2.0x1.6mm packages from different manufacturers, provided pinouts and electrical characteristics match. Verify equivalent frequency accuracy and temperature stability ranges. Cross-reference with similar models like the 18QHTF21-9.81563-OE only if frequency differences are acceptable.
