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Product Detailed Parameters
- Description：71.734681 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：71.734681 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)：26mA
- 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 18QHTF21-71.734681-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 71.734681 MHz with 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 2.0 x 1.6 mm.
Feature Summary
- Supports low-voltage operation at 1.8V for power efficiency
- Includes standby mode capability for power management
- Utilizes LVCMOS output logic for digital interface compatibility
- Features a leadless surface-mount package design
Applications
- Digital signal processing systems requiring precise clocking
- Communication equipment utilizing standard frequency references
- Embedded systems with space-constrained PCB layouts
- Consumer electronics devices needing low-power oscillators
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable within the specified operating range. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly issues. Check for any specific handling instructions regarding electrostatic discharge protection during installation.
Selection Notes
Select this component when a 71.734681 MHz reference is required with LVCMOS outputs. Consider the 1.8V supply constraint and standby functionality for power-sensitive designs. Evaluate the 2.0x1.6mm package size against available board space. Compare performance metrics such as phase noise and stability if critical for the application environment.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies with standardized LVCMOS outputs and low-voltage operation. The 'PD' suffix indicates the inclusion of a power-down feature. This family targets applications requiring small form factors and efficient power consumption.
Replacement Considerations
Direct substitutes must match the 71.734681 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical specifications before substitution. Alternative parts may require design adjustments if voltage levels or package dimensions differ.
