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Product Detailed Parameters
- Description：12.7455 MHz XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.7455 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 18QHTF21-12.7455-OE is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.7455 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 2.5V and features an enable/disable control function. It is housed in a compact 2.5mm x 2.0mm SMD package with no lead construction, designed for surface-mount applications.
Feature Summary
- LVCMOS output logic for standard digital interfacing
- Integrated enable/disable control functionality
- Compact 2.5x2.0mm surface-mount package design
Applications
- General clock signal generation
- Digital circuit timing references
- Embedded system clock sources
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target application's datasheet specifications. Confirm that the 2.5V supply voltage aligns with the system power rails. Ensure the enable/disable pin configuration matches the control logic levels used in the design to guarantee proper operation and power management.
Selection Notes
Select this component when a precise 12.7455 MHz clock source is required in a small form factor. The LVCMOS output is suitable for standard CMOS-compatible logic families. Consider the enable/disable feature if power conservation or clock gating is necessary within the system architecture compared to continuously running oscillators.
Part Context
This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies and supply voltages, including 1.8V and 2.5V options. The 'OE' suffix typically denotes the enable/disable capability, distinguishing it from standard continuous-output variants within the same package footprint.
Replacement Considerations
Direct substitutes must match the 12.7455 MHz frequency, 2.5V supply, LVCMOS output, and 2.5x2.0mm package dimensions. Verify pin compatibility for the enable/disable function. Cross-reference with other manufacturers offering similar SMD oscillators, ensuring electrical parameters and thermal characteristics are equivalent.
