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Product Detailed Parameters
- Description：13.537 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：13.537 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 18QHTF21-13.537-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 13.537 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is suitable for applications requiring precise timing signals in low-voltage digital circuits.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby and power-down functionality for energy efficiency
- Utilizes a compact 4-SMD no lead surface mount package
Applications
- Battery-powered portable devices
- Low-voltage digital circuit timing
- General purpose clock signal generation
Procurement Notes
Verify the specific frequency suffix matches the required 13.537 MHz operation. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no lead package footprint is compatible with the PCB layout. Check datasheet specifications for operating temperature range and load requirements before integration.
Selection Notes
Select this model when a 13.537 MHz clock source is required with LVCMOS outputs. Consider the 1.8V operating voltage for compatibility with modern low-power logic families. The integrated power-down feature makes it suitable for battery-operated systems where standby current reduction is critical. Verify package dimensions against available board space constraints.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd., which manufactures quartz crystals and oscillators. The series includes various frequencies such as 51.2 MHz and 68.665 MHz. Mercury Electronics is a Taiwan-based supplier established in 1973, specializing in frequency control products including TCXOs and VCTCXOs.
Replacement Considerations
Direct substitutes within the same series include parts like 18QHTF21-13.537 (without PD suffix) if power-down is not required. Other frequencies in the 18QHTF21 series share similar electrical characteristics but differ in output frequency. Cross-reference with other manufacturers offering 13.537 MHz LVCMOS oscillators in 2.0x1.6mm packages.
