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Product Detailed Parameters
- Description：6.57 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：6.57 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)：21mA
- 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 18QHTF21-6.570-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 6.57 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes standby mode to reduce power consumption during idle periods
- Designed for low-voltage operation with 1.8V supply requirement
Applications
- Battery-powered portable electronic devices
- General-purpose digital timing circuits
- Low-power embedded systems requiring precise clock signals
Procurement Notes
Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm the 4-SMD no-lead package dimensions match your PCB footprint specifications to avoid assembly issues.
Selection Notes
Select this component when a low-profile, low-voltage oscillator is required for space-constrained designs. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the standby feature if power management is critical for the application's battery life or thermal constraints.
Part Context
This part belongs to the 18QHTF21 series from Mercury Electronic, which specializes in quartz-based frequency control products. The manufacturer has a history dating back to 1973, focusing on crystals and oscillators. This specific model represents a standard XO variant optimized for modern low-voltage digital applications.
Replacement Considerations
Direct substitutes may include other 1.8V LVCMOS oscillators in a 4-SMD no-lead package with similar frequency ratings. Verify pinout compatibility and electrical characteristics such as current consumption and startup time when evaluating alternative sources.
