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Product Detailed Parameters
- Description：6.85 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：6.85 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 18QHTF21-6.850-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 6.85 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby function for power down capabilities. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.
Feature Summary
- LVCMOS output logic for digital interface compatibility
- Integrated standby mode to reduce power consumption
- Lead-free surface mount construction
Applications
- Battery-powered portable devices
- General purpose digital timing circuits
- Embedded systems requiring low power operation
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout specifications. Check for any RoHS compliance documentation if required by your manufacturing standards.
Selection Notes
Select this component when a low-voltage 1.8V supply is available and LVCMOS outputs are required. Consider the standby feature if power management is critical. Compare the 6.85 MHz frequency against other available options in the 18QHTF21 series if different frequencies are needed. Evaluate the physical size constraints of the 4-SMD package against your board space limitations.
Part Context
This part belongs to the Mercury Electronic 18QHTF21 series of quartz crystal oscillators. The series typically offers various frequencies with LVCMOS outputs and low voltage operation. Mercury Electronics is a Taiwan-based manufacturer specializing in frequency control products including crystals and oscillators since 1973.
Replacement Considerations
Check the 18QHTF21-6.850 without the PD suffix or other variants in the 18QHTF21 series for potential substitutes. Verify pinout and electrical specifications match exactly before substitution.
