ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：HC49 SMD MHZ QUARTZ XTAL / METAL
- Series：QT49S
- Mfr：QST
- Package：Tape & Reel (TR)
- Type：MHz Crystal
- Frequency：12 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：20pF
- ESR (Equivalent Series Resistance)：40 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：HC-49/US
- Size / Dimension：0.449" L x 0.189" W (11.40mm x 4.80mm)
- Height - Seated (Max)：-
Download product information
Overview
The QT49S-12.000MAHK-T is a surface-mount MHz crystal manufactured by QST, operating at a nominal frequency of 12 MHz. It features a fundamental working mode with a load capacitance of 20pF and an equivalent series resistance (ESR) of 80 Ohms. The component exhibits a frequency stability and tolerance of ±30ppm at 25°C, extending to ±30ppm across the operating temperature range of -40°C to +85°C. It is housed in an HC-49/US package with dimensions of 0.449" L x 0.189" W (11.40mm x 4.80mm).
Feature Summary
- Surface mount design utilizing the HC-49/US package format for standard footprint compatibility.
- Fundamental oscillation mode operation ensuring stable frequency generation.
- Wide operating temperature range capability from -40°C to +85°C for industrial environments.
Applications
- General-purpose clock signal generation in electronic circuits.
- Timing reference sources for microcontroller systems.
- Frequency control in consumer electronics requiring standard SMD footprints.
Procurement Notes
Verify that the specific ordering suffix matches the required package style and tolerance specifications. Confirm that the HC-49/US form factor aligns with the target PCB layout constraints. Ensure the ±30ppm stability rating meets the system timing requirements before finalizing procurement orders.
Selection Notes
Select this component when a standard HC-49/US surface-mount footprint is required for a 12 MHz application. Consider the 80 Ohm ESR value for oscillator circuit compatibility. Evaluate the ±30ppm stability against the system's total allowable frequency error budget.
Part Context
This part belongs to the QT49S series of quartz crystals produced by QST Products LLC. The series offers various frequency options within the HC-49/US surface-mount package. This specific model provides a 12 MHz output with moderate stability suitable for general timing applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameters if considering alternative manufacturers.
FAQ
What is the operating temperature range for this crystal?
The operating temperature range is -40°C to +85°C.
What is the package type for the QT49S-12.000MAHK-T?
It uses the HC-49/US surface-mount package.
