18QHTF21-1.835-PD

Overview

The 18QHTF21-1.835-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.835 MHz and utilizes LVCMOS output logic. The device is powered by a 1.8V supply voltage and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within embedded systems.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Utilizes LVCMOS output logic interface
• Available in a small 4-SMD no-lead package

Applications

• Embedded systems requiring clock signals
• Portable electronic devices
• Battery-powered equipment

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under your environmental conditions.

Selection Notes

Select this component when a low-frequency clock source near 1.835 MHz is required. Consider the 1.8V supply constraint and LVCMOS compatibility with your microcontroller or FPGA inputs. Evaluate the need for power-down capabilities if energy efficiency is critical. Compare the physical size of the 2.0x1.6mm package against available board space. Verify that the output drive strength meets the capacitive load of your connected circuits.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies and supply voltages. The 'PD' suffix likely indicates a specific pinout or packaging variant consistent with the manufacturer's naming convention for this form factor. These components are generally used as primary clock sources in digital electronics.

Replacement Considerations

Direct substitutes must match the 1.835 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pin-to-pin compatibility and electrical characteristics such as current consumption and jitter specifications. Consult the manufacturer's cross-reference list for approved alternatives.