RN2105ACT(TPL3)

Overview

The RN2105ACT(TPL3) is a PNP digital transistor manufactured by Toshiba Semiconductor and Storage, featuring built-in bias resistors to simplify circuit design. It operates with a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. The device includes two integrated resistors, R1 and R2, both typically valued at 10 kOhms, providing a resistance ratio of 1:1. Packaged in the compact SC-70 (SOT-323) surface-mount format, it offers a transition frequency of 200 MHz and a maximum power dissipation of 100 mW. This component is designed for efficient switching applications in low-voltage environments.

Feature Summary

• Integrates dual bias resistors with a 1:1 ratio to reduce external component count and PCB space.
• Optimized for high-speed switching with a 200 MHz transition frequency.
• Utilizes a compact SC-70 surface-mount package for automated assembly and miniaturization.

Applications

• Switching circuits in portable consumer electronics
• Interface driver stages for logic level translation
• Inverter circuits in battery-powered devices

Procurement Notes

Verify the specific suffix TPL3 against the manufacturer's latest datasheet to confirm tape-and-reel packaging specifications and moisture sensitivity levels. Ensure compatibility with RoHS3 directives if required by the target market regulations. Cross-reference the part number with official Toshiba Semiconductor and Storage catalogs to validate current production status and availability channels before finalizing procurement plans.

Selection Notes

Select this component when a PNP configuration with equal base and emitter bias resistors is required. The 10 kOhm resistor values are suitable for standard TTL and CMOS logic interfaces. Consider the 100 mA current limit and 50 V voltage rating to ensure operation within safe limits. The SC-70 package is ideal for space-constrained designs requiring surface-mount technology integration.

Part Context

This part belongs to the RN series of pre-biased transistors from Toshiba, which integrates bipolar junction transistors with internal biasing networks. The RN2105 variant specifically denotes a PNP type with a 1:1 resistor ratio. The TPL3 suffix indicates the specific packaging and taping configuration used for high-volume surface-mount manufacturing processes.

Replacement Considerations

Direct substitutes include other PNP digital transistors with identical 10k/10k resistor ratios and SC-70 packaging, such as the RN2105A or equivalent parts from other manufacturers like ROHM or ON Semiconductor, provided pinouts and electrical ratings match exactly.