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Product Detailed Parameters
- Description：10.5 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：10.5 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)：22mA
- 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 18QHTF21-10.500-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 10.5 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and an integrated standby or power-down function to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount designs.
Feature Summary
- LVCMOS output interface for digital compatibility
- Integrated power-down mode for energy efficiency
- Compact 4-SMD no-lead surface mount package
Applications
- General purpose clock signal generation
- Low-power embedded systems
- Consumer electronics timing circuits
Procurement Notes
Verify the specific ordering suffix and frequency tolerance requirements against the official datasheet before procurement. Ensure that the 1.8V supply voltage aligns with the target system's power rails. Confirm the package type matches the PCB footprint design. Check for any specific environmental ratings required for the intended operating conditions.
Selection Notes
Select this component when a precise 10.5 MHz reference is required with minimal power consumption. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the small form factor for dense board layouts. Verify that the operating temperature range meets the application's environmental specifications.
Part Context
This part belongs to the Mercury Electronics XO series, which provides standard frequency oscillators. The manufacturer specializes in quartz crystals and frequency control products. This specific model represents a low-voltage option within their portfolio, targeting modern portable and battery-operated devices requiring stable clock sources.
Replacement Considerations
Direct substitutes must match the 10.5 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as rise/fall times and duty cycle. Cross-reference with other manufacturers offering similar low-profile oscillators if availability is an issue.
