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The IT121 is a tightly matched, monolithic dual NPN bipolar junction transistor (BJT) array manufactured by Linear Integrated Systems. Designed for surface-mount applications, it features an 8-SOIC package and complies with RoHS standards. The device supports a collector-emitter voltage of 45V and a continuous collector current of 10mA. It offers a transition frequency of 180MHz and a power dissipation rating of 500mW. This component is suitable for small-signal amplifier and switching circuits requiring precise matching between the two internal transistors.
Verify the specific ordering suffix to confirm the package type and compliance status. Ensure the supplier provides official datasheets from Linear Integrated Systems or authorized distributors. Confirm that the received components match the IT121 designation and 8-SOIC form factor. Check for RoHS certification documentation if required for your assembly process. Validate part authenticity through traceable supply chain channels.
Select this component when precise matching between two NPN transistors is critical for circuit performance. Consider the 45V voltage limit and 10mA current capability against your design requirements. The 180MHz transition frequency makes it suitable for moderate-speed applications. Evaluate the 8-SOIC footprint compatibility with your PCB layout constraints before finalizing the selection.
The IT121 belongs to the IT120-series of bipolar transistors offered by Linear Integrated Systems. This series includes various package options such as TO-71, TO-78, PDIP, and SOIC configurations. The family is designed for general-purpose small-signal applications where matched transistor pairs are beneficial for improved circuit symmetry and performance stability.
Consult official manufacturer substitution guides for verified equivalents. Cross-reference pinouts and electrical parameters carefully when considering alternative dual NPN arrays. Verify that any substitute maintains the 8-SOIC package dimensions and RoHS compliance status.