RN4903,LXHF(CT

Overview

The RN4903,LXHF(CT is a digital transistor manufactured by Toshiba Semiconductor and Storage, featuring an integrated PNP transistor within a US-6 (SOT-363) surface-mount package. It incorporates built-in bias resistors to simplify circuit design and reduce component count. Key electrical specifications include a maximum collector-emitter voltage of -50V and a continuous collector current of -100mA. The device utilizes a typical input resistor configuration with R1 and R2 both valued at 22kΩ. It offers a minimum DC current gain (hFE) of 70 and supports maximum operating frequencies of 200MHz and 250MHz. The unit has a power dissipation rating of 200mW and can operate at temperatures up to +150°C.

Feature Summary

• Integrates a PNP transistor with dual built-in bias resistors for simplified interface applications
• Utilizes an Extreme-Super-Mini US-6 package to minimize footprint and assembly costs
• Designed for high-speed switching with transition frequencies up to 250MHz

Applications

• Switching circuits requiring compact form factors
• Inverter circuits for signal processing
• Interface circuits between logic gates and loads
• Driver circuits for low-power devices

Procurement Notes

Verify the specific suffix LXHF(CT against the manufacturer's latest datasheet to confirm packaging details and automotive qualification status. Ensure compatibility with SMD/SMT assembly processes given the US-6 package type. Cross-reference the AEC-Q101 qualification if the application requires automotive-grade reliability standards. Confirm that the 22kΩ resistor values align with the target circuit's base drive requirements.

Selection Notes

Select this component when a single PNP digital transistor with equal bias resistors is required in a small outline package. The 22kΩ internal resistance values are suitable for standard logic level interfacing. Consider the -50V VCEO rating for low-voltage switching applications. The US-6 package is ideal for space-constrained PCB layouts where minimizing solder joints and parts count is critical for manufacturing efficiency.

Part Context

This part belongs to the RN49xx series of pre-biased transistors from Toshiba. These devices combine bipolar junction transistors with internal resistors to replace multiple discrete components. The RN4903 specifically pairs a PNP transistor with 22kΩ/22kΩ resistors, distinguishing it from other series members like the RN4901 or RN4905 which feature different resistor ratios or NPN configurations.

Replacement Considerations

Direct substitutes may include other Toshiba models within the RN49xx family with matching PNP polarity and similar resistor values, such as RN4903 variants with different packaging suffixes. Verify pinout compatibility and electrical ratings before substituting with non-Toshiba equivalents.