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Product Detailed Parameters
- Description：74.17575 MHz XO 1.8V 2.0X1.6 PD
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：74.17575 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 18QHTF21-74.17575-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 74.17575 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, featuring a supply voltage range of 1.8V. It supports a standby mode with power-down functionality to reduce energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby mode with power-down capability
- Compact 4-SMD no-lead surface mount package
Applications
- Digital signal processing systems requiring precise clock timing
- Communication equipment utilizing standard frequency references
- Embedded control units operating at 1.8V logic levels
Procurement Notes
Verify the specific frequency suffix matches the required 74.17575 MHz specification. Confirm the package type is 4-SMD No Lead and the voltage rating aligns with 1.8V system requirements. Ensure the manufacturer designation corresponds to Mercury Electronic Ind. Co., Ltd. to guarantee authenticity and datasheet accuracy.
Selection Notes
Select this component when a fixed-frequency reference at 74.17575 MHz is required for LVCMOS-compatible circuits. Consider the 1.8V supply constraint and the need for power-down functionality. The small form factor makes it appropriate for dense PCB layouts where space is limited compared to larger oscillator packages.
Part Context
This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series offers various frequencies within the LVCMOS family, sharing common electrical characteristics and mechanical footprints. The 'PD' suffix typically indicates specific packaging or tape-and-reel configuration details defined by the manufacturer.
Replacement Considerations
Direct substitutes must match the 74.17575 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility and electrical specifications before swapping.
