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Product Detailed Parameters
- Description：71.0 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：71 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 18QHTF21-71.000-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 71.0 MHz with an LVCMOS output logic level. The device requires a 2.5V supply voltage and features a power-down standby function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The maximum supply current is specified as 26mA, supporting efficient operation in space-constrained electronic designs.
Feature Summary
- Supports low-power standby mode via power-down control
- Utilizes LVCMOS output interface for digital compatibility
- Designed for portable applications due to low current consumption
Applications
- Battery-powered portable devices
- Compact consumer electronics
- Space-constrained embedded systems
Procurement Notes
Verify the specific supply voltage requirement of 2.5V against target circuit design specifications before procurement. Confirm that the LVCMOS output logic levels are compatible with the receiving component inputs. Ensure the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to prevent assembly errors during manufacturing.
Selection Notes
Select this component when a 71.0 MHz clock signal is required within a minimal footprint constraint. The 2.5V operating voltage must align with the system's power rail availability. Consider the 26mA current draw for thermal and power budget calculations in battery-operated environments where efficiency is critical.
Part Context
This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options, with the '18' prefix typically indicating the 1.8V or 2.5V variant family depending on specific datasheet definitions. The '-PD' suffix denotes the inclusion of a power-down feature for energy management.
Replacement Considerations
Direct substitutes include other 71.0 MHz LVCMOS oscillators in 2.0x1.6mm packages with 2.5V operation. Verify pinout compatibility and electrical parameters such as jitter and phase noise if strict timing precision is required. Cross-reference with Mercury's own catalog for alternative frequencies or voltages within the same form factor.
