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Product Detailed Parameters
- Description：124.2 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：124.2 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 18QHTF21-124.200-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a fixed frequency of 124.2 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a power-down capability via a standby control input. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- Generates a precise 124.2 MHz clock signal using LVCMOS output interface
- Operates on a low 1.8V supply voltage for energy efficiency
- Includes standby functionality to enable power-down mode
Applications
- Digital signal processing systems requiring stable clock sources
- Communication equipment utilizing high-frequency timing references
- Embedded systems with space-constrained PCB layouts
Procurement Notes
Verify the exact frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply rail is stable and within the specified operating range. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to prevent assembly issues.
Selection Notes
Select this component when a specific 124.2 MHz frequency is required alongside low-voltage operation. Consider the small form factor for dense circuit designs. Evaluate if the LVCMOS output swing meets the input thresholds of the downstream logic family without additional buffering.
Part Context
This part belongs to the Mercury Electronics XO series, designed for general-purpose clock generation. The model number indicates the specific frequency variant within the 18QHTF21 product line. It represents a standard non-differential oscillator solution suitable for single-ended clock distribution networks.
Replacement Considerations
Direct substitutes must match the 124.2 MHz frequency, 1.8V supply, and 4-SMD no-lead package. Verify pin compatibility and output logic levels. Cross-reference with other manufacturers offering identical electrical specifications and mechanical dimensions.
