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Product Detailed Parameters
- Description：12.223 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：12.223 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 18QHTF21-12.223-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, designed for low-voltage CMOS applications. It operates at a fixed frequency of 12.223 MHz and utilizes LVCMOS output logic. The device is powered by a single 1.8V supply voltage and features a standby mode for power-down functionality. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, suitable for surface-mount assembly.
Feature Summary
- Supports low-voltage CMOS applications with LVCMOS output logic
- Includes standby mode for power-down capability
- Compact 4-SMD no-lead surface mount package
Applications
- Low-voltage CMOS digital circuits
- Clock signal generation in portable electronics
- Embedded systems requiring precise timing references
Procurement Notes
Verify the specific frequency suffix matches the required system clock. Confirm the 1.8V supply requirement aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint fits the PCB layout constraints. Check for RoHS compliance if required by project specifications.
Selection Notes
Select this component when a 12.223 MHz clock source is needed for 1.8V logic families. Consider the small form factor for space-constrained designs. Verify that the LVCMOS output swing is compatible with downstream inputs. Evaluate thermal performance within the specified operating temperature range.
Part Context
This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The 'PD' suffix typically indicates the presence of a power-down control pin or feature. These components are commonly used in communication devices and consumer electronics.
Replacement Considerations
Direct substitutes must match the 12.223 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility before replacement. Cross-reference with other manufacturers offering similar SMD oscillators if availability is an issue.
