RN4981,LXHF(CT

Overview

The RN4981,LXHF(CT is a dual digital transistor manufactured by Toshiba Semiconductor and Storage, integrating one NPN and one PNP bipolar junction transistor within a single US6 surface-mount package. This component features built-in bias resistors to simplify circuit design and reduce component count. Key electrical specifications include a maximum collector-emitter voltage (VCEO) of 50 V and a continuous collector current (IC) of 100 mA for both transistors. The typical input base resistor (R1) is 4.7 kΩ, with a corresponding emitter resistor (R2) also at 4.7 kΩ, resulting in a resistor ratio of 1. The device supports a minimum DC current gain (hFE) of 30 and operates up to a maximum frequency of 200 MHz for the NPN and 250 MHz for the PNP element. It is qualified under AEC-Q101 standards for automotive applications.

Feature Summary

• Integrates complementary NPN and PNP transistors with built-in bias resistors in a compact SMD package
• AEC-Q101 qualified for automotive reliability requirements
• Simplifies circuit design by reducing external component count and manufacturing processes

Applications

• Automotive interface circuits requiring signal inversion or buffering
• Driver circuits for low-current loads in vehicle electronics
• Switching applications in automotive control modules

Procurement Notes

Verify the specific ordering suffix LXHF(CT) against the manufacturer's latest datasheet to confirm packaging details such as reel size or cut tape specifications. Ensure that the US6 package footprint matches the target PCB layout. Confirm AEC-Q101 qualification status if the application requires automotive-grade compliance, as this affects supply chain sourcing and quality assurance protocols.

Selection Notes

Select this component when a complementary NPN/PNP pair with equal 4.7 kΩ bias resistors is required in a minimal footprint. The 50 V rating and 100 mA current capacity suit low-power switching tasks. Consider the 200/250 MHz frequency limits for high-speed applications. Compare against similar Toshiba models like RN4981FE if different resistance values or alternative package types are needed for the specific design constraints.

Part Context

This part belongs to Toshiba's RN498x series of pre-biased digital transistors. These devices are designed to replace discrete transistor-resistor networks, offering space savings on printed circuit boards. The RN4981 variant specifically provides symmetric resistor values (R1=R2=4.7kΩ), making it suitable for balanced push-pull or complementary switching configurations in consumer and automotive electronics.

Replacement Considerations

RN4981FE,LF(CT offers identical electrical characteristics and pinout in the same US6 package. RN4981(T5L,F,T) is another compatible variant from Toshiba with the same functional parameters. Verify that any substitute maintains the 4.7 kΩ resistor ratio and AEC-Q101 qualification if automotive use is intended.