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Product Detailed Parameters
- Description：121.5 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：121.5 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)：28mA
- 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 18QHTF21-121.500-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 121.5 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and supports a standby power-down mode. It features a frequency stability of ±50ppm and functions within an operating temperature range of -40°C to +85°C. The maximum supply current is 28mA. The component utilizes a surface-mount package, specifically a 4-SMD, No Lead configuration.
Feature Summary
- Supports low-voltage operation at 1.8V with LVCMOS output compatibility
- Includes a standby power-down function for energy management
- Designed for high-frequency applications up to 121.5 MHz
- Operates reliably across extended industrial temperature ranges
Applications
- High-speed digital signal processing systems
- Communication equipment requiring precise clock synchronization
- Industrial control units operating in variable temperatures
- Embedded systems utilizing LVCMOS interfaces
Procurement Notes
Verify the specific part number suffix against official Mercury Electronics documentation to ensure correct voltage and frequency specifications. Confirm that the 1.8V supply requirement aligns with your system design. Check for any specific handling instructions related to the 4-SMD no-lead package during assembly. Ensure environmental ratings meet the operational temperature requirements of the target application.
Selection Notes
Select this component when a stable 121.5 MHz clock source is required for LVCMOS-compatible circuits. Consider the ±50ppm stability specification for timing-sensitive designs. Evaluate the 28mA current consumption against power budget constraints. The wide temperature range makes it suitable for demanding industrial environments compared to commercial-grade alternatives.
Part Context
This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a compact footprint. The 'PD' suffix likely indicates specific packaging or testing parameters defined by the manufacturer. This component serves as a critical timing reference for modern electronic systems requiring miniaturization and low power consumption.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided data. Consult Mercury Electronics directly for cross-reference information. Ensure any replacement matches the 1.8V supply, LVCMOS output, and 4-SMD package dimensions.
FAQ
What is the output logic type for this oscillator?
The 18QHTF21-121.500-PD uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic.
Does this component support power saving modes?
Yes, the device includes a standby (power down) feature to reduce current consumption when not in use.
What is the maximum supply current?
The maximum supply current for this oscillator is 28mA.
