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Product Detailed Parameters
- Description：77.125 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：77.125 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 18QHTF21-77.125-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 77.125 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range from -40°C to 85°C.
Feature Summary
- Integrates LVCMOS output logic for standard digital interface compatibility
- Includes standby functionality to enable power down states
- Utilizes a surface-mount 4-SMD no lead package design
Applications
- General purpose clock signal generation
- Embedded system timing references
- Consumer electronics circuit boards
Procurement Notes
Verify the specific frequency tolerance and phase noise specifications against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system's power rails. Ensure the 4-SMD footprint matches the PCB layout constraints. Check for any RoHS compliance documentation if required by project standards.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The small 2.0x1.6mm package makes it suitable for space-constrained designs. Consider the -40°C to 85°C temperature range for industrial or commercial applications. Compare against other frequencies in the 18QHTF21 series if different clock speeds are needed.
Part Context
This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent 1.8V operation and LVCMOS outputs. Similar models include variants like 18QHTF21-96.768-PD and 18QHTF21-77.600-PD, which share the same package and electrical characteristics but differ in output frequency.
Replacement Considerations
Direct substitutes within the same series include 18QHTF21-77.600-PD and 18QHTF21-77.780-PD, provided the slight frequency deviation is acceptable. Cross-brand replacements require matching the 1.8V supply, LVCMOS output, and 4-SMD package dimensions.
