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Product Detailed Parameters
- Description：121.306 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：121.306 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 18QHTF21-121.306-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 121.306 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function, often referred to as standby or power-down mode. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is currently listed as active.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes enable/disable functionality for power management
- Utilizes a base crystal resonator for frequency stability
- Available in a small form factor 4-SMD no lead package
Applications
- General clock signal generation in electronic circuits
- Digital systems requiring precise timing references
- Embedded devices utilizing LVCMOS interfaces
Procurement Notes
Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct configuration. Confirm that the required output logic and voltage levels match the target system design. Check for any recent updates to the datasheet regarding pin assignments or electrical characteristics before finalizing procurement.
Selection Notes
Select this component when a 121.306 MHz clock source is required with low voltage operation. Ensure the application supports LVCMOS signaling standards. Consider the physical footprint constraints due to the 2.0x1.6mm package size. Verify thermal requirements against the specified operating temperature range.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies within a standardized package format. Mercury Electronics is a established manufacturer of frequency control products, including quartz crystals and oscillators, with a long history in the industry.
Replacement Considerations
Direct substitutes must match the 121.306 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Cross-reference with other manufacturers offering identical pinouts and electrical specifications to ensure functional interchangeability without circuit redesign.
