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Product Detailed Parameters
- Description：12.544 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：12.544 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 18QHTF21-12.544-OE is a standard XO oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.544 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features enable/disable functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. Frequency stability is specified at ±50ppm.
Feature Summary
- Supports active enable and disable control for power management
- Utilizes LVCMOS output interface for digital compatibility
- Designed in a miniature surface-mount footprint
Applications
- Portable electronic devices requiring low power consumption
- Embedded systems utilizing LVCMOS logic families
- Compact consumer electronics hardware
Procurement Notes
Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power architecture. Ensure the 4-SMD no-lead package dimensions fit within the designated PCB layout constraints to avoid mechanical interference.
Selection Notes
Select this component when a precise 12.544 MHz reference is required for LVCMOS-based circuits. The integrated enable pin allows for dynamic power control, making it suitable for battery-operated applications. The small form factor supports high-density board designs where space is limited compared to larger oscillator packages.
Part Context
This model belongs to the Mercury Electronics 18QHTF21 series of quartz crystal oscillators. The series provides various frequency options within a standardized 2.0x1.6 mm package. These components are designed for timing applications requiring stable clock signals in modern digital systems.
Replacement Considerations
Direct substitutes must match the 12.544 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent stability ratings and enable pin functionality from other manufacturers offering similar surface-mount oscillators.
