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Product Detailed Parameters
- Description：12.28 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：12.28 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 18QHTF21-12.280-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.28 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function. It is housed in a 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm.
Feature Summary
- Supports Low Voltage CMOS (LVCMOS) output logic for digital interfacing
- Includes Standby mode functionality to reduce power consumption
- Designed for surface mount assembly using a compact no-lead package
Applications
- Battery-powered portable devices
- Low voltage digital systems
- Communication equipment requiring precise timing
Procurement Notes
Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB design guidelines provided by Mercury Electronics.
Selection Notes
Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The integrated standby feature makes it suitable for applications where power management is critical. Consider the physical dimensions of the 3.2x2.5mm package to ensure adequate space on the circuit board layout.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products. The series offers various frequencies within a compact surface-mount form factor. The 'PD' suffix typically indicates the inclusion of a power-down or standby control pin, distinguishing it from standard continuous-operation oscillators.
Replacement Considerations
Direct substitutes include other 12.28 MHz LVCMOS oscillators in a 4-SMD no-lead package with 1.8V operation. Verify pin compatibility and electrical specifications before swapping. Check if alternative manufacturers offer equivalent performance metrics for the same package type.
