18QHTF21-1.680-PD

Overview

The 18QHTF21-1.680-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.68 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is engineered for applications requiring precise clock signals within low-power constraints.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Supports standby mode via power-down control pin
• Utilizes a miniature 4-SMD no-lead surface mount package

Applications

• Low-frequency clock signal generation in portable electronics
• Timing reference for microcontrollers operating at 1.8V
• Battery-powered devices requiring power-down capabilities

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with the target system design. Confirm that the 4-SMD no-lead package footprint matches the PCB layout specifications to prevent assembly errors during manufacturing.

Selection Notes

Select this component when a low-frequency 1.68 MHz clock source is required alongside minimal power consumption. The integrated power-down feature makes it suitable for systems needing active and inactive states. Ensure the application environment supports the specified operating temperature range and that the LVCMOS output levels are compatible with the receiving logic inputs.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies with standardized 1.8V operation and compact footprints. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from continuous-output variants within the same physical package family.

Replacement Considerations

Direct substitutes must match the 1.68 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify that any alternative component also supports the power-down functionality. Cross-reference pinouts to ensure compatibility with existing PCB traces.