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Product Detailed Parameters
- Description：121.3056 MHz XO 1.8V 2.0X1.6 PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：121.3056 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 18QHTF21-121.3056-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 121.3056 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a power-down pin for standby functionality. 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 operation at 1.8V
- Includes power-down capability for energy management
- Utilizes LVCMOS output logic levels
Applications
- High-speed digital signal processing systems
- Communication equipment requiring precise clocking
- Embedded systems with space constraints
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply voltage aligns with your power architecture. Ensure the 4-SMD no-lead package footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a stable 121.3056 MHz reference is required in a minimal footprint. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the power-down feature if system efficiency is critical. Verify operating temperature ranges meet environmental conditions for the intended application environment.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a small 2.0x1.6mm package. The series supports LVCMOS outputs and 1.8V operation. The suffix -PD indicates the inclusion of a power-down control function, distinguishing it from standard continuous-output variants in the same family.
Replacement Considerations
Direct substitutes must match the 121.3056 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and jitter. Cross-reference with other manufacturers offering similar ultra-small form factor oscillators with identical pinout and functional specifications.
