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Product Detailed Parameters
- Description：12.566937 M XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.566937 MHz
- Function：Enable/Disable
- 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)：22mA
- 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 18QHTF21-12.566937-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.566937 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes enable/disable pin functionality for power optimization
- Utilizes a low-profile surface-mount package design
Applications
- General clock signal generation in embedded systems
- Timing reference for microcontroller units
- Data communication interface synchronization
Procurement Notes
Verify the specific suffix 'OE' against the manufacturer's official documentation to confirm the enable/disable feature and voltage tolerance. Ensure the 1.8V supply requirement aligns with the target circuit design. Confirm the 4-SMD no-lead footprint matches the PCB land pattern specifications before finalizing procurement orders.
Selection Notes
Select this component when a precise 12.566937 MHz timing source is required for low-voltage applications. The LVCMOS output ensures compatibility with standard digital logic families. Consider the enable/disable capability if system power efficiency is a priority. Verify that the operating temperature range meets the environmental requirements of the intended deployment scenario.
Part Context
This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series is characterized by small form factors and standardized output levels. The 18 prefix typically indicates the 1.8V supply voltage variant within the product line. These components are designed for space-constrained electronic assemblies requiring reliable frequency stability.
Replacement Considerations
Direct substitutes must match the 12.566937 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify electrical parameters such as load capacitance and drive level compatibility. Cross-reference with other manufacturers offering identical pinout and dimensional specifications to ensure mechanical interchangeability.
