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Product Detailed Parameters
- Description：13.556 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：13.556 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 18QHTF21-13.556-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 13.556 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.
Feature Summary
- Supports low-voltage operation at 1.8V for power efficiency
- Includes standby functionality to reduce power consumption during idle periods
- Utilizes LVCMOS output logic for digital interface compatibility
- Designed in a small surface-mount package for space-constrained applications
Applications
- Battery-powered portable electronic devices
- Digital signal processing circuits requiring precise timing
- Communication systems utilizing standard clock frequencies
- Embedded systems with strict size limitations
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the PCB layout supports the 4-SMD no-lead package footprint. Check for any specific handling instructions regarding electrostatic discharge protection during assembly.
Selection Notes
Select this component when a 13.556 MHz clock source is required with low voltage operation. Consider the LVCMOS output level compatibility with the target microcontroller or FPGA. Evaluate the need for power-down capabilities to extend battery life in portable designs. Verify that the 2.0x1.6mm package fits within the available board area constraints.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, which focuses on quartz crystal oscillators. The series includes various frequencies and output types. The 'PD' suffix indicates the inclusion of a power-down feature. This family is designed for applications requiring stable timing signals in compact form factors.
Replacement Considerations
Direct substitutes must match the 13.556 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar XO specifications if Mercury parts are unavailable.
