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Product Detailed Parameters
- Description：120.237 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：120.237 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 18QHTF21-120.237-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 120.237 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- Supports Low Voltage CMOS (LVCMOS) output interface
- Includes Standby mode for power down capability
- Utilizes surface-mount 4-SMD no lead packaging
Applications
- General clock signal generation
- Digital system timing reference
- Embedded electronics applications
Procurement Notes
Verify the specific frequency tolerance and operating temperature range requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD footprint matches the PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge sensitivity during assembly.
Selection Notes
Select this component when a precise 120.237 MHz clock source is required in space-constrained designs. The 1.8V operation makes it suitable for low-power digital systems. The standby feature allows for power optimization in battery-operated devices. Consider the small 2.0x1.6 mm package size for high-density board layouts.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent 1.8V LVCMOS outputs and compact SMD packages. The 'PD' suffix indicates the inclusion of a power-down control pin or functionality within the device architecture.
Replacement Considerations
Direct substitutes include other 120.237 MHz LVCMOS oscillators in 4-SMD 2.0x1.6mm packages from compatible manufacturers. Verify electrical compatibility including voltage levels and output drive strength. Mechanical footprint matching is essential for direct replacement without PCB redesign.
