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Product Detailed Parameters
- Description：7.87 MHz XO 1.8V 2.0X1.6 MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：7.87 MHz
- Function：Enable/Disable
- 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 18QHTF21-7.870-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 7.87 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and includes an enable/disable control function for power management. 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 enable/disable functionality for power control
- Compact 4-SMD no-lead surface mount package
Applications
- General clock signal generation
- Digital circuit timing references
- Embedded system clock sources
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the enable/disable pin configuration matches your control logic to ensure proper operation during standby modes.
Selection Notes
Select this component when a low-voltage 1.8V supply is required alongside LVCMOS outputs. The enable/disable feature makes it suitable for battery-powered or power-sensitive designs. Consider the small 4-SMD footprint if board space is limited. Verify that the 7.87 MHz frequency meets the exact timing needs of the target application.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and supply voltages, all featuring LVCMOS outputs and enable/disable controls. The suffix -OE typically denotes specific packaging or ordering configurations within the manufacturer's catalog.
Replacement Considerations
Direct substitutes include other 7.87 MHz LVCMOS oscillators with 1.8V supplies and enable pins from compatible manufacturers. Ensure pinout compatibility and package dimensions match the 4-SMD no-lead form factor. Verify electrical parameters such as phase noise and jitter meet original design requirements.
