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Product Detailed Parameters
- Description：12.498375 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：12.498375 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 18QHTF21-12.498375-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 12.498375 MHz and utilizes LVCMOS output logic. The device 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 component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated enable/disable functionality for power management
- Compact surface-mount package design
Applications
- Digital signal processing systems
- Communication equipment clocking
- Embedded microcontroller timing sources
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications. Check for any specific RoHS compliance documentation if required by the manufacturing environment.
Selection Notes
Select this component when a precise 12.498375 MHz reference is required for LVCMOS-compatible circuits. The 1.8V operating voltage makes it suitable for modern low-power portable devices. Consider the small 2.0x1.6 mm footprint for space-constrained designs. The enable pin allows for dynamic power control, which is beneficial for battery-operated applications.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies within the same physical footprint. The 'OE' suffix typically denotes the presence of an output enable pin. Mercury Electronics specializes in quartz crystals and frequency control products, providing reliable timing solutions for industrial and consumer electronics.
Replacement Considerations
Direct replacements must match the 12.498375 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical parameters such as jitter and stability against the original datasheet. Cross-reference with other manufacturers offering similar SMD oscillators with identical pinouts and form factors.
