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Product Detailed Parameters
- Description：12.58 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：12.58 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 18QHTF21-12.580-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.58 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down function for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for applications requiring precise timing signals in space-constrained electronic systems.
Feature Summary
- Supports low-voltage operation at 1.8V for energy efficiency
- Includes power-down functionality to reduce current consumption during standby
- Utilizes LVCMOS output logic for digital interface compatibility
- Offers a miniature surface-mount package for PCB space optimization
Applications
- Portable consumer electronics devices
- Battery-powered instrumentation systems
- Digital communication interfaces requiring clock synchronization
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the PCB layout accommodates the 2.0x1.6mm footprint and no-lead soldering process. Cross-reference the part number suffix PD to confirm power-down capability availability.
Selection Notes
Select this component when a low-profile, low-voltage oscillator with standby control is required. Consider the 12.58 MHz frequency suitability for the target system's clock input requirements. Evaluate the LVCMOS output swing against the receiving device's input thresholds. Assess the thermal performance within the intended operating temperature range specified by the manufacturer.
Part Context
This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series typically includes various frequencies and output types, all sharing similar physical dimensions and voltage characteristics. Mercury Electronics has been a supplier of such components since 1973, focusing on precision timing solutions.
Replacement Considerations
Direct substitutes may include other 12.58 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package from different manufacturers. Verify pinout compatibility and electrical parameters such as phase noise and jitter before substitution. Ensure the replacement supports the same 1.8V supply and power-down control logic.
