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Product Detailed Parameters
- Description：81.36 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：81.36 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)：26mA
- 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 18QHTF21-81.360-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 81.36 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby and power-down functionality for energy management
- Utilizes a surface-mount 4-SMD no-lead package design
Applications
- General clock signal generation in electronic circuits
- Digital systems requiring precise timing references
- Embedded devices utilizing low-voltage power supplies
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 package footprint matches the PCB layout requirements to guarantee proper soldering and mechanical stability during assembly.
Selection Notes
Select this component when a fixed 81.36 MHz frequency is required for LVCMOS-compatible digital interfaces. Consider the 1.8V supply constraint and the availability of a power-down feature for applications prioritizing power efficiency. Evaluate the physical size constraints of the 2.0x1.6mm package against available board space.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 1.8V LVCMOS format. The series provides consistent packaging and electrical characteristics across different frequency options, simplifying inventory management for designs requiring multiple clock speeds.
Replacement Considerations
Direct substitutes include other 18QHTF21 variants with identical pinout and voltage specifications but different frequencies, such as 18QHTF21-81.300-PD, provided the frequency difference is acceptable for the application.
