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Product Detailed Parameters
- Description：1.2 MHz XO 1.8V 2.0X1.6 MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：1.2 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)：21mA
- 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 18QHTF21-1.200-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 1.2 MHz and utilizes LVCMOS output logic levels. The component is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The device is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.
Feature Summary
- LVCMOS output interface for digital signal compatibility
- Integrated enable/disable functionality for power management
- Standard XO design with guaranteed frequency stability
Applications
- General-purpose timing reference circuits
- Embedded systems requiring low-power clock sources
- Consumer electronics with surface-mount constraints
Procurement Notes
Verify the specific ordering suffix against the manufacturer's current datasheet to ensure correct voltage and package configuration. Confirm that the 1.8V supply requirement aligns with your system design before procurement. Check for any recent revisions to the enable/disable pinout or electrical characteristics to avoid integration issues during production.
Selection Notes
Select this component when a precise 1.2 MHz clock signal is required with minimal power consumption. The 1.8V operating voltage makes it suitable for modern low-voltage digital logic families. Ensure the PCB layout supports the 4-SMD no-lead package dimensions and thermal requirements specified in the official mechanical drawing.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, including 3.3V variants. The 'OE' suffix typically denotes the enable/disable feature, distinguishing it from basic XO models without control pins.
Replacement Considerations
Direct substitutes include other 1.2 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation and enable functions. Verify pin-to-pin compatibility and electrical specifications such as load capacitance and drive strength before swapping components.
