18QHTF21-1.1387-PD

Overview

The 18QHTF21-1.1387-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.1387 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby mode for power down functionality. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6mm. This component serves as a precise clock source for digital circuits requiring low-power operation and small form factors.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital loads
• Includes standby control capability to reduce power consumption during inactive periods
• Utilizes a surface-mount 4-SMD no-lead package for automated assembly

Applications

• Portable electronic devices requiring low-voltage clock sources
• Embedded systems utilizing LVCMOS-compatible processors
• Battery-powered consumer electronics needing power-down modes

Procurement Notes

Verify the specific ordering suffix PD against the manufacturer's current datasheet to ensure compatibility with required packaging and tape-and-reel specifications. Confirm that the 1.8V supply voltage aligns with the target system's power rail before integration. Check for any recent updates to the RoHS compliance status or material declarations provided by Mercury Electronics Ind. Co. Ltd.

Selection Notes

Select this component when a 1.1387 MHz frequency is strictly required for timing applications. Ensure the design supports a 1.8V operating voltage and can accommodate the 4-SMD no-lead footprint. Consider the standby feature if power management is critical for the end application. Verify that LVCMOS output levels are compatible with the receiving logic inputs without additional buffering.

Part Context

This part belongs to the 18QHTF21 series of standard XO oscillators from Mercury Electronics. The series offers various frequencies within a 2.0x1.6mm package. The 1.1387-PD variant specifically targets low-frequency timing needs. Mercury Electronics specializes in quartz crystals and frequency control products, providing these oscillators for industrial and commercial use cases.

Replacement Considerations

Direct substitutes must match the 1.1387 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as load capacitance and drive level. Cross-reference with other manufacturers offering similar small-form-factor XO components.