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Product Detailed Parameters
- Description：1.042 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：1.042 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 18QHTF21-1.042-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.042 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby power-down function. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, designed for surface mount technology applications.
Feature Summary
- Integrates LVCMOS output interface for digital signal compatibility
- Features a low-profile 4-SMD no-lead package suitable for space-constrained designs
- Supports active and standby modes via power-down control
Applications
- Space-constrained PCB layouts requiring small form factor oscillators
- Digital systems utilizing LVCMOS logic levels
- Portable electronic devices requiring low power consumption
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB design to avoid assembly issues. Check for any specific handling instructions regarding the surface mount components.
Selection Notes
Select this component when a precise 1.042 MHz reference is required in a minimal footprint. The LVCMOS output simplifies interfacing with standard digital logic without additional level shifting. The power-down feature aids in battery life extension for portable applications. Consider the 1.8V operating voltage to ensure compatibility with modern low-voltage microcontrollers and processors.
Part Context
Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in frequency-control products, including quartz crystals and oscillators. The company has a history dating back to 1973, establishing itself as a pioneer in the Taiwanese crystal industry. This part belongs to their line of surface-mount crystal oscillators designed for various timing applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully if considering alternative manufacturers.
