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Product Detailed Parameters
- Description：1.44 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：1.44 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 18QHTF21-1.440-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a standard frequency of 1.44 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 mm x 1.6 mm.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby mode capability via power-down control
- Utilizes quartz crystal technology for frequency stability
Applications
- General-purpose clock signal generation
- Embedded systems requiring low-voltage timing references
- Portable electronic devices utilizing surface-mount components
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 constraints. Check for any specific handling instructions regarding electrostatic discharge sensitivity during assembly.
Selection Notes
Select this component when a precise 1.44 MHz reference is required in space-constrained designs. The choice is driven by the need for low voltage operation and integrated power management features. Consider the physical dimensions of the 2.0x1.6mm package relative to available board real estate. Evaluate the LVCMOS output swing against the input thresholds of the receiving logic circuitry.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. The series offers various frequencies within the kHz to MHz range. The 'PD' suffix indicates the inclusion of a power-down pin or feature. This model represents a standard frequency option within the broader product line designed for modern electronics.
Replacement Considerations
Direct substitutes include other 1.44 MHz XO models from Mercury Electronics such as the 18QHTF21-1.440-OE, provided the lead type and operational parameters are compatible. Cross-referencing with other manufacturers requires matching the LVCMOS output, 1.8V supply, and 2.0x1.6mm package dimensions.
