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Product Detailed Parameters
- Description：49.09091 MHz XO 1.8V 2.0X1.6 PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：49.09091 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)：23mA
- 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 18QHTF21-49.09091-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.09091 MHz with an LVCMOS output signal type. The device requires a 1.8V supply voltage and supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6mm, suitable for surface-mount applications.
Feature Summary
- LVCMOS output interface for digital logic compatibility
- Integrated standby function to reduce power consumption
- Compact 4-SMD no-lead surface mount package
Applications
- General purpose clock generation in embedded systems
- Timing reference for low-voltage digital circuits
- Portable electronic devices requiring small form factor oscillators
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure that the 1.8V supply rail is stable and within the operational limits defined in the official datasheet. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package dimensions to avoid assembly issues.
Selection Notes
Select this component when a precise 49.09091 MHz clock source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint and the need for a power-down feature. The small 2.0x1.6mm package makes it suitable for space-constrained designs compared to larger oscillator packages.
Part Context
This part belongs to the Mercury Electronics 18QHTF series of standard crystal oscillators. The series offers various frequencies and voltage options, typically utilizing quartz resonator technology. The 'PD' suffix indicates the specific package and pin configuration variant within this product line.
Replacement Considerations
Direct replacements must match the 49.09091 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical parameters such as phase noise and stability if available from alternative manufacturers.
