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Product Detailed Parameters
- Description：11.111111 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：11.111111 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)：22mA
- 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 18QHTF21-11.111111-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 11.111111 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6mm, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports low-voltage operation at 1.8V
- Includes standby and power-down functionality
- Provides LVCMOS output signal compatibility
Applications
- Digital clock generation in embedded systems
- Timing reference for microcontrollers
- Synchronization in communication interfaces
Procurement Notes
Verify the specific ordering suffix and voltage rating against the official datasheet before procurement. Ensure the selected variant matches the required 1.8V supply and LVCMOS output specifications. Confirm package dimensions and pin configuration align with the target PCB footprint to prevent assembly errors.
Selection Notes
Select this component when a stable 11.111111 MHz reference is required for low-power designs. The 1.8V operating voltage makes it suitable for modern portable electronics. Consider the integrated power-down feature for applications demanding extended battery life or reduced idle current consumption.
Part Context
This part belongs to the QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequency options and voltage levels within a standardized 2.0x1.6mm footprint. The '18' prefix typically indicates the 1.8V supply variant, distinguishing it from other voltage versions in the same family.
Replacement Considerations
Direct substitutes must match the 11.111111 MHz frequency, 1.8V voltage, LVCMOS output, and 4-SMD no-lead package. Verify electrical parameters and thermal characteristics before cross-referencing with other manufacturers' offerings.
