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Product Detailed Parameters
- Description：12.9876 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.9876 MHz
- Function：Standby (Power Down)
- 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 18QHTF21-12.9876-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 12.9876 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode for power down functionality to reduce energy consumption during inactive periods. The component is housed in a compact 4-SMD package with no lead construction, measuring 2.0mm by 1.6mm in footprint dimensions.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby mode capability for power down operations
- Utilizes lead-free SMD packaging for surface mount assembly
Applications
- Digital signal processing circuits
- Communication equipment timing references
- Embedded system clock generation
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package dimensions fit within the designated PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge sensitivity.
Selection Notes
Select this component when a precise 12.9876 MHz clock source is required for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage as a primary constraint for power supply design. Evaluate the need for standby functionality if power management is critical. Compare the physical size against available board space to ensure mechanical compatibility.
Part Context
This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic Ind. Co., Ltd. The series offers various frequency options within a standardized small outline package. Mercury Electronics specializes in quartz crystals and timing components, providing solutions for consumer electronics and industrial applications requiring stable frequency control.
Replacement Considerations
Direct substitutes must match the 12.9876 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical specifications with alternative manufacturers.
