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Product Detailed Parameters
- Description：75.4 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：75.4 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 Mercury Electronics 18QHTF21-75.400-PD is a 75.4 MHz crystal oscillator (XO) operating at a supply voltage of 1.8V. It utilizes LVCMOS output logic and features a Standby (Power Down) control function for power management. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.
Feature Summary
- Integrates LVCMOS output logic for standard digital interface compatibility
- Includes standby mode functionality to reduce power consumption during idle periods
- Designed in a small form factor surface-mount package for space-constrained layouts
Applications
- General clock signal generation in embedded systems
- Timing reference sources for digital communication interfaces
- Clock distribution in portable electronic devices requiring low power operation
Procurement Notes
Verify the specific suffix against official documentation to confirm the control function. The model number indicates a Power Down feature; ensure this matches system requirements rather than assuming an Enable/Disable variant. Confirm package dimensions and lead-free status with the manufacturer datasheet before integration.
Selection Notes
Select this component when a 75.4 MHz frequency is required alongside strict size constraints due to its 2.0x1.6 mm footprint. Consider the 1.8V supply voltage requirement and LVCMOS output levels. The presence of a standby function makes it suitable for battery-operated applications where power efficiency during non-active states is critical.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and control options, including enable/disable and power down variants. This specific model represents the power-down configuration within the standard LVCMOS family.
Replacement Considerations
Direct substitutes must match the 75.4 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify that replacement parts also support the standby/power-down control function to maintain equivalent power management capabilities.
