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Product Detailed Parameters
- Description：124.342875 M XO 1.8V 2.0X1.6 PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：124.342875 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)：28mA
- 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 18QHTF21-124.342875-PD is a crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 124.342875 MHz with LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function. It is housed in a 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.
Feature Summary
- Supports low-voltage operation at 1.8V
- Integrates standby and power-down functionality
- Utilizes LVCMOS output logic for digital interfacing
Applications
- Digital signal processing systems
- Communication equipment requiring precise clocking
- Embedded systems utilizing standard CMOS interfaces
Procurement Notes
Verify the specific ordering suffix to ensure compatibility with required voltage levels and output types. Confirm that the 4-SMD no-lead package aligns with PCB footprint specifications. Check datasheet details for operating temperature ranges and load capacitance requirements before finalizing component selection for production.
Selection Notes
Select this component when a 124.342875 MHz clock source is required in a compact form factor. Ensure the system design accommodates the 1.8V supply constraint. Verify that LVCMOS logic levels are compatible with downstream circuitry inputs. Consider the availability of the power-down feature if energy efficiency during idle states is a design priority.
Part Context
This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and package sizes. The 'PD' suffix typically indicates specific packaging or handling characteristics defined by the manufacturer. This model represents a standard XO variant within their portfolio of frequency control products.
Replacement Considerations
Direct substitutes include other 18QHTF21 series parts with identical pinouts and electrical characteristics but different frequencies, such as the 18QHTF21-51.200-PD or 18QHTF21-18.8696-PD, provided the frequency difference is acceptable for the application.
