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Product Detailed Parameters
- Description：122.88 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：122.88 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 18QHTF21-122.880-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 122.88 MHz with an LVCMOS output logic type. The device supports a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm. This component is designed for high-reliability timing applications requiring precise clock signals.
Feature Summary
- LVCMOS output interface for standard digital logic compatibility
- Integrated standby mode to reduce power consumption during idle periods
- Compact surface-mount package suitable for space-constrained designs
Applications
- High-speed data communication interfaces
- Network equipment clocking
- Consumer electronics timing circuits
Procurement Notes
Verify the specific ordering suffix and frequency tolerance against the official datasheet before procurement. Ensure the supply voltage requirements match the system design. Confirm package dimensions and pin configuration for PCB layout compatibility. Check for RoHS compliance status if required by project specifications.
Selection Notes
Select this oscillator when a 122.88 MHz clock signal is required with low voltage operation. Consider the 1.8V supply constraint and LVCMOS output swing. Evaluate the need for power-down functionality for battery-operated devices. Compare size constraints against the 2.0x1.6 mm footprint availability.
Part Context
This part belongs to the Mercury Electronics SMD oscillator series, which includes various frequencies and packages. The 18QHTF21 series typically offers standard performance levels for general-purpose timing. Mercury Electronics specializes in quartz crystals and oscillators, providing frequency control solutions for industrial and consumer markets.
Replacement Considerations
Direct substitutes may include other 122.88 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson, NDK, or SiTime. Verify electrical parameters such as phase noise, jitter, and load capacitance. Ensure mechanical compatibility with the existing footprint.
