RN1407,LXHF

Overview

The RN1407 is a built-in bias resistor transistor (BRT) manufactured by Toshiba Semiconductor and Storage. This NPN silicon epitaxial planar device integrates an NPN transistor with two internal bias resistors, typically configured as a voltage divider network on the base terminal. The LXHF suffix indicates specific packaging and handling specifications, often associated with tape-and-reel formats for automated assembly. Designed for switching applications, it simplifies circuit design by reducing component count and board space requirements compared to discrete transistor-resistor combinations.

Feature Summary

• Integrated bias resistor network eliminates external components
• Simplified circuit design reduces layout area
• Consistent electrical characteristics due to monolithic construction

Applications

• General-purpose switching circuits
• Driver stages for logic interfaces
• Level shifting applications in digital systems

Procurement Notes

Verify the exact datasheet revision corresponding to the LXHF suffix to confirm mechanical dimensions and reel specifications. Ensure compatibility with automated placement equipment regarding tape pitch and pocket size. Cross-reference manufacturer documentation for storage conditions and moisture sensitivity levels prior to assembly.

Selection Notes

Confirm that the integrated resistance values meet the required base drive current and saturation voltage specifications for the target application. Evaluate thermal performance under expected load conditions. Verify that the NPN configuration aligns with the circuit topology and polarity requirements of the design.

Part Context

This component belongs to Toshiba's RN series of BRTs, which are designed to replace discrete resistor-transistor networks. The series offers various resistance combinations and transistor types (NPN/PNP) to suit different logic families and switching speeds. The RN1407 specifically provides a standardized configuration for common switching needs.

Replacement Considerations

Direct substitutes include other NPN BRTs with similar resistance ratios and hFE ranges from manufacturers like ROHM or ON Semiconductor. Verify pinout compatibility and package dimensions before substitution. Electrical parameters such as Vceo and Ic must be equal to or exceed original specifications.