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Product Detailed Parameters
- Description：12.8 MHz XO 1.8V 2.0X1.6 MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.8 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 18QHTF21-12.800-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 12.8 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly. The component is designed for applications requiring precise timing signals with low power consumption.
Feature Summary
- LVCMOS output logic compatibility
- Integrated standby and power-down functionality
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing systems
- Communication equipment timing references
- Embedded microcontroller clock sources
Procurement Notes
Verify the specific ordering suffix and frequency tolerance against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with system requirements. Confirm the 4-SMD package dimensions match PCB layout constraints. Check for RoHS compliance status if required by project specifications.
Selection Notes
Select this component when a 12.8 MHz reference is required with LVCMOS interface standards. Consider the 1.8V operating voltage for low-power designs. Evaluate the 4-SMD footprint for space-constrained layouts. Verify thermal performance within the specified operating temperature range.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies including 51.2 MHz, 46.8 MHz, and 48.7056 MHz. All variants share similar packaging and electrical characteristics, differing primarily in output frequency and specific application tuning.
Replacement Considerations
Direct substitutes include other 12.8 MHz LVCMOS oscillators in 4-SMD packages. Verify pinout compatibility and voltage levels. Cross-reference with Mercury Electronics part numbers such as 18QHTF21-12.300-PD for similar form factors.
