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Product Detailed Parameters
- Description：HC49 THROUGH HOLE MHZ QUARTZ XTA
- Series：QT49
- Mfr：QST
- Package：Tape & Reel (TR)
- Type：MHz Crystal
- Frequency：8 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：20pF
- ESR (Equivalent Series Resistance)：80 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：HC-49/US
- Size / Dimension：0.453" L x 0.197" W (11.50mm x 5.00mm)
- Height - Seated (Max)：0.145" (3.68mm)
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Overview
The QT49-8.000MAHK-B is a through-hole quartz crystal resonator manufactured by QST Products LLC. It operates at a fundamental frequency of 8 MHz with a load capacitance of 20 pF. The component exhibits a frequency stability and tolerance of ±30 ppm at 25°C, extending to ±30 ppm across an operating temperature range of -40°C to +85°C. It utilizes the HC-49S package, measuring 11.5 mm in length, 5 mm in width, and 3.68 mm in height. The device supports base harmonic operation mode.
Feature Summary
- Through-hole mounting configuration for standard PCB assembly
- Fundamental resonance mode operation at 8 MHz
- Wide industrial temperature range capability from -40°C to +85°C
Applications
- Microcontroller clock generation circuits
- Communication interface timing references
- General-purpose digital logic timing sources
Procurement Notes
Verify the specific suffix HK against official QST documentation to confirm the exact package dimensions and lead configuration. Ensure the load capacitance requirement of the target oscillator circuit matches the specified 20 pF value to maintain accurate frequency stability within the stated ±30 ppm tolerance limits.
Selection Notes
Select this component when a through-hole HC-49S form factor is required for mechanical robustness or existing board layout constraints. Consider the ±30 ppm stability specification against system timing requirements. Verify that the 20 pF load capacitance aligns with the host oscillator circuit design parameters.
Part Context
This part belongs to the QT49 series of quartz crystals produced by QST Products LLC. The series offers various frequency options and package types, including surface mount and through-hole variants. The HC-49S package is a standard industry format widely used in consumer electronics and industrial control applications requiring reliable timing signals.
FAQ
What is the operating temperature range for this crystal?
The QT49-8.000MAHK-B is rated for an operating temperature range of -40°C to +85°C.
What is the load capacitance specification?
The specified load capacitance for this component is 20 pF.
