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Product Detailed Parameters
- Description：118.272 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：118.272 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)：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 18QHTF21-118.272-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 118.272 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.00mm x 1.60mm.
Feature Summary
- Supports low-voltage operation at 1.8V
- Includes standby and power-down functionality
- Utilizes LVCMOS output logic
Applications
- General clock signal generation
- Digital circuit timing reference
- Embedded system synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target application's specifications before procurement. Confirm that the 1.8V supply voltage aligns with the system design. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.
Selection Notes
Select this component when a precise 118.272 MHz clock source is required for digital systems operating at 1.8V. The choice is driven by the need for LVCMOS compatibility and the integration of power management features via the standby pin. Consider the small form factor suitable for space-constrained designs. Evaluate if the standard XO performance meets the jitter and stability needs of the specific application.
Part Context
This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0mm x 1.6mm package. These components are designed for applications requiring stable clock signals in portable and compact electronic devices, leveraging Mercury's expertise in quartz frequency control products.
Replacement Considerations
Direct substitutes must match the 118.272 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify electrical parameters such as phase noise and duty cycle. Cross-reference with other manufacturers offering similar ultra-small form factor oscillators with identical pin configurations and functional characteristics.
