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Product Detailed Parameters
- Description：13.581445 M XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：13.581445 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)：22mA
- 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 18QHTF21-13.581445-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.581445 MHz and utilizes LVCMOS output logic levels. The device is designed for surface mount applications, featuring a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm. It functions at a supply voltage of 1.8V and includes an Enable/Disable control feature for power management.
Feature Summary
- Supports Enable/Disable functionality for power control
- Utilizes LVCMOS output interface
- Designed for surface mount assembly
Applications
- General purpose clock signal generation
- Embedded system timing references
- Consumer electronics circuit boards
Procurement Notes
Verify the specific suffix 'PD' against official Mercury Electronics documentation to confirm the presence of standby or power-down capabilities as distinct from standard enable/disable variants. Ensure the 1.8V supply requirement aligns with target system rails. Confirm package dimensions match PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a precise 13.581445 MHz reference is required in space-constrained designs. The 1.8V operation suits low-power portable devices. Compare against similar models like the 25QHTF32 series if higher voltage tolerance or larger package availability is needed. Validate frequency stability specifications against application timing budgets.
Part Context
This part belongs to the Mercury Electronics XO family, which includes various frequencies and packages such as the 25QHTF32 series. These oscillators are quartz-based frequency control components used alongside crystals and filters. The 18QHTF21 series specifically targets small form factor applications requiring stable clock signals.
Replacement Considerations
Direct substitutes include other 13.581445 MHz LVCMOS oscillators in 2.0x1.6mm packages. Verify electrical compatibility regarding voltage and current consumption. Check pinout definitions to ensure interchangeability without PCB redesign.
