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Product Detailed Parameters
- Description：12.123 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：12.123 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 18QHTF21-12.123-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.123 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby (power down) feature for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications.
Feature Summary
- Supports low-voltage operation at 1.8V
- Integrates standby mode for power reduction
- Provides LVCMOS signal output compatibility
Applications
- Battery-powered portable devices
- General-purpose digital timing circuits
- Embedded system clock generation
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply rail stability meets the component specifications. Confirm that the 4-SMD no-lead package dimensions align with the target PCB footprint to prevent assembly issues during manufacturing.
Selection Notes
Select this model when a precise 12.123 MHz clock source is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the 1.8V operating voltage as a primary constraint for power supply design. The integrated standby function supports systems requiring active power management strategies.
Part Context
This component belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series typically offers standard oscillators with various frequency options and output types. Mercury Electronic has established itself as a supplier for crystals, TCXOs, and VCTCXOs since 1973.
Replacement Considerations
Check for direct substitutes within the same series offering identical 12.123 MHz frequency and LVCMOS output. Verify pinout compatibility for the 4-SMD package. Ensure replacement parts support the same 1.8V supply voltage and standby functionality.
