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Product Detailed Parameters
- Description：77.048 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：77.048 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 18QHTF21-77.048-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 77.048 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The component supports an operating temperature range from -40°C to 85°C and maintains a frequency stability of ±50ppm.
Feature Summary
- Supports standby mode for power reduction
- Compact surface-mount package design
- LVCMOS output compatibility
Applications
- Embedded systems requiring precise timing
- Communication equipment clock sources
- Industrial control modules
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable within the specified operating temperature range. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions to avoid assembly issues during manufacturing.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside a compact form factor. The standby feature makes it suitable for battery-powered or energy-efficient applications. Consider the ±50ppm stability limit for timing-sensitive designs where higher precision oscillators might be necessary.
Part Context
This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and supply voltages, catering to diverse electronic design needs. The PD suffix indicates the inclusion of a power-down pin functionality, distinguishing it from continuous-operation variants.
Replacement Considerations
Direct substitutes include other 18QHTF21 series parts with identical package and voltage specifications but different frequencies, such as 18QHTF21-77.780-PD, provided the frequency difference is acceptable for the application.
