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Product Detailed Parameters
- Description：75.555 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：75.555 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 18QHTF21-75.555-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 75.555 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, specifically supporting a supply voltage of 1.8V. It features a compact surface-mount package with dimensions of 2.0mm x 1.6mm in a 4-SMD, No Lead configuration. The component includes standby functionality for power-down control, enhancing energy efficiency in portable systems.
Feature Summary
- LVCMOS output interface for digital logic compatibility
- Integrated standby mode for power management
- Compact 4-SMD no-lead surface mount package
Applications
- Portable electronic devices requiring low power consumption
- Communication equipment utilizing standard clock signals
- Embedded systems with limited board space constraints
Procurement Notes
Verify the exact operating temperature range and load capacitance requirements from the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD footprint matches the PCB layout specifications to avoid assembly issues during manufacturing.
Selection Notes
Select this component when a precise 75.555 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V supply constraint and the need for standby functionality. Evaluate the small 2.0x1.6mm package size against available board real estate. Compare against other frequencies in the 18QHTF21 series if different timing standards are needed.
Part Context
This part belongs to the Mercury Electronic 18QHTF21 series of standard crystal oscillators. The series offers various frequencies within a consistent 4-SMD no-lead form factor. Mercury Electronics specializes in quartz crystals and timing solutions, providing reliable frequency control products for global electronics markets since 1973.
Replacement Considerations
Check for direct substitutes within the same series, such as the 18QHTF21-75.675-PD or 18QHTF21-18.1059-PD, which share identical packaging and electrical characteristics but differ in frequency. Verify pinout compatibility before swapping.
