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Product Detailed Parameters
- Description：7.86432 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：7.86432 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)：21mA
- 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 18QHTF21-7.86432-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 7.86432 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function via standby mode. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.
Feature Summary
- Supports low-voltage operation at 1.8V
- Includes power-down capability for energy management
- Utilizes LVCMOS output logic for digital interfacing
Applications
- General clock signal generation
- Digital circuit timing reference
- Portable electronic devices requiring low power
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions. Confirm that the 1.8V supply rail meets the current consumption specifications during active and standby states to guarantee reliable operation.
Selection Notes
Select this component when a precise 7.86432 MHz clock source is required in space-constrained designs. The choice is driven by the need for low voltage compatibility and integrated power management. Consider the operating temperature range and stability requirements relative to the application environment.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various standard frequencies tailored for digital applications. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from standard continuous-operation variants within the same package family.
Replacement Considerations
Direct substitutes must match the 7.86432 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering equivalent low-profile oscillators with identical electrical parameters.
