RN1308,LXHF

Overview

The RN1308,LXHF is a single NPN Bias Resistor Built-in Transistor (BRT) manufactured by Toshiba Semiconductor and Storage. It integrates internal biasing resistors with an NPN bipolar junction transistor in a compact surface-mount package. The device features a collector-emitter maximum voltage (VCEO) of 50 V and a continuous collector current rating of 100 mA. Internal resistor values are specified as R1 = 22 kΩ and R2 = 47 kΩ, yielding a typical resistance ratio of approximately 0.468. The component supports a maximum operating frequency of 250 MHz and has a power dissipation capability of 100 mW. It is qualified under AEC-Q standards for automotive applications and operates within a temperature range up to +150°C.

Feature Summary

• Integrates NPN transistor with built-in base and emitter bias resistors to simplify circuit design
• Qualified for automotive electronic systems meeting AEC-Q reliability standards
• Designed for high-speed switching operations with a maximum operating frequency of 250 MHz
• Utilizes USM-3 surface mount packaging for efficient board space utilization

Applications

• Automotive control unit input/output interface circuits
• General-purpose logic level translation and driver stages
• Switching applications in consumer electronics requiring compact form factors

Procurement Notes

Verify the specific suffix 'LXHF' against the manufacturer's official documentation to confirm lead-free compliance and RoHS status. Ensure the ordering part number matches the required SOT-323 (USM) package variant. Confirm that the integrated resistor values (R1=22kΩ, R2=47kΩ) align with the target circuit design requirements before finalizing procurement orders.

Selection Notes

Select this component when a single NPN BRT with a 50V VCEO rating and 100mA current capacity is required. The specific internal resistor configuration of 22kΩ and 47kΩ suits applications needing moderate base drive currents. Consider the USM-3 package dimensions for PCB layout constraints. This part is suitable for designs prioritizing reduced component count and simplified biasing networks in space-constrained environments.

Part Context

The RN1308 belongs to Toshiba's RN series of Bias Resistor Built-in Transistors. These devices combine discrete transistors with on-chip resistors to replace multiple discrete components. The LXHF suffix typically denotes specific packaging and environmental compliance attributes defined by the manufacturer. This series is widely used in digital logic interfaces and signal conditioning circuits across industrial and automotive sectors.

Replacement Considerations

Cross-reference with other single NPN BRTs featuring similar VCEO ratings and comparable internal resistor ratios. Verify pinout compatibility and thermal characteristics if substituting in existing layouts. Ensure any alternative part meets the same AEC-Q automotive qualification standards if used in vehicle applications.