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Product Detailed Parameters
- Description：78.336 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：78.336 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)：26mA
- 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 18QHTF21-78.336-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 78.336 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.
Feature Summary
- Integrates LVCMOS output logic for standard digital interface compatibility
- Features a standby mode to reduce power consumption during inactive periods
- Utilizes a surface-mount 4-SMD no-lead package for automated assembly
Applications
- General clock signal generation in electronic circuits
- Timing reference for digital systems requiring 1.8V operation
- Embedded applications utilizing standard LVCMOS interfaces
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD package footprint matches the PCB layout constraints. Check for any specific ordering suffixes required for tape and reel delivery if applicable to the manufacturing process.
Selection Notes
Select this component when a precise 78.336 MHz clock source is required within a low-voltage 1.8V environment. The choice is driven by the need for LVCMOS compatibility and a small form factor suitable for space-constrained designs. Consider the standby feature if power efficiency is a critical design parameter for the application.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in frequency control products. The series typically offers various frequencies within a standardized 2.0x1.6mm SMD package. Mercury Electronics has been a manufacturer of these components since 1973, establishing a presence in the crystal industry.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Cross-referencing requires matching the 78.336 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions with other manufacturers' offerings.
