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Product Detailed Parameters
- Description：57.875 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：57.875 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)：24mA
- 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 18QHTF21-57.875-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 57.875 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly. This component is designed to provide stable clock signals for digital circuits requiring precise timing synchronization.
Feature Summary
- LVCMOS output logic interface
- Standby power down capability
- Surface mount 4-SMD no lead package
Applications
- Digital system clock generation
- Data communication interfaces
- Embedded controller timing sources
Procurement Notes
Verify the specific operating temperature range and frequency stability requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD package footprint matches the PCB layout constraints. Cross-reference the part number suffix PD with manufacturer documentation to confirm availability and exact specifications.
Selection Notes
Select this oscillator when a 57.875 MHz clock signal with LVCMOS compatibility is required. Consider the 1.8V supply constraint and the need for standby functionality. Evaluate the thermal performance and stability needs against the standard XO specifications. Ensure the small form factor fits within the available board space for the application.
Part Context
This model belongs to the Mercury Electronics 18QHTF series of surface mount crystal oscillators. The series typically offers various frequencies and supply voltages. The 18QHTF21 variant specifically denotes the 1.8V supply version with a 4-SMD package. These components are part of Mercury's broader portfolio of frequency control products established since 1973.
Replacement Considerations
Check for direct substitutes from Mercury Electronics with identical pinout and electrical characteristics. Verify if other manufacturers offer compatible LVCMOS oscillators at 57.875 MHz with 1.8V operation. Ensure any replacement maintains the same package dimensions and standby control functionality.
