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Product Detailed Parameters
- Description：1.54368 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：1.54368 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 18QHTF21-1.54368-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 1.54368 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.
Feature Summary
- Supports low-voltage operation with 1.8V supply requirement
- Includes standby functionality for power management
- Utilizes LVCMOS output interface for digital compatibility
Applications
- General-purpose digital circuit timing
- Embedded system clock generation
- Consumer electronics timing references
Procurement Notes
Verify the specific ordering suffix to ensure the correct frequency and package variant are selected. Confirm that the 1.8V supply voltage aligns with the target system design. Check for RoHS compliance status if required by project specifications. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints before finalizing procurement.
Selection Notes
Select this component when a stable 1.54368 MHz reference is needed for LVCMOS-compatible circuits. Consider the 1.8V operating voltage range to ensure compatibility with low-power microcontrollers. The standby feature makes it suitable for battery-operated devices where power conservation is critical during idle periods.
Part Context
This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The 18QHTF21 designation indicates a specific SMD oscillator form factor. Mercury Electronics has been a manufacturer of frequency control products since 1973, establishing this component within their established portfolio of quartz-based timing devices.
Replacement Considerations
Direct substitutes must match the 1.54368 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as load capacitance and drive strength before swapping manufacturers.
