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Product Detailed Parameters
- Description：12.1875 MHz XO 1.8V 2.0X1.6MM PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：12.1875 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 18QHTF21-12.1875-PD is a quartz crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 12.1875 MHz with LVCMOS output logic. The device functions on a 1.8V supply voltage and features a power-down (PD) control pin for standby mode management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range of -40°C to 85°C.
Feature Summary
- Integrated power-down functionality for energy-efficient standby operation
- Compact surface-mount design suitable for space-constrained applications
- LVCMOS output interface compatible with standard digital logic
Applications
- Portable electronic devices requiring low power consumption
- Communication modules utilizing precise timing signals
- Embedded systems needing compact clock sources
Procurement Notes
Verify the specific suffix 'PD' indicates the Power Down feature when sourcing replacements. Confirm the operating temperature range matches application requirements. Ensure the 1.8V supply voltage aligns with system power rails. Check package footprint compatibility during PCB layout review.
Selection Notes
Select this model for applications requiring a 12.1875 MHz reference with low power standby capabilities. Consider the 2.0x1.6mm footprint for board space optimization. Evaluate LVCMOS output drive strength against load requirements. Compare stability specifications if tighter tolerance is needed.
Part Context
This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized small outline package. The PD suffix denotes the inclusion of a control pin for power management, distinguishing it from continuous-operation variants.
Replacement Considerations
Direct substitutes include other 12.1875 MHz LVCMOS oscillators in 4-SMD No Lead packages with power-down features. Verify pinout compatibility and electrical parameters before substitution.
