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Product Detailed Parameters
- Description：7.68 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：7.68 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 18QHTF21-7.680-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 7.68 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.
Feature Summary
- Supports low-voltage operation with 1.8V supply
- Includes standby power-down functionality
- Provides LVCMOS digital output signals
Applications
- Battery-powered portable devices
- General-purpose timing circuits
- Embedded system clock generation
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package dimensions fit within your PCB footprint constraints. Cross-reference the datasheet for thermal performance limits during continuous operation.
Selection Notes
Select this component when a precise 7.68 MHz reference is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the standby feature if power conservation is critical. Verify that the operating temperature range meets your environmental specifications.
Part Context
This part belongs to the QHTF series of quartz crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The '18' prefix typically indicates the 1.8V supply variant. These components are widely used in consumer electronics and industrial equipment requiring stable clock signals.
Replacement Considerations
Compatible substitutes include other 7.68 MHz LVCMOS oscillators with 1.8V supply and similar package footprints. Ensure replacement parts match the pinout and electrical characteristics. Verify that alternative sources provide equivalent frequency stability and phase noise specifications.
