Dual PNP pre-biased pair — two transistors, one SOT-553 package
The Toshiba RN2704JE(TE85L,F) packs two PNP transistors with built-in bias resistors into a single SOT-553 package. Each transistor has a 47kΩ resistor in series with the base and a 47kΩ resistor from base to emitter, so you get a complete switching stage without adding external resistors to the board. Collector-emitter breakdown is rated at 50 V, and each side handles up to 100 mA continuous collector current. The 200 MHz transition frequency means it keeps up with fast switching in signal-level applications.
47kΩ built-in resistors — two fewer parts per channel
With R1 and R2 both at 47kΩ, the RN2704JE forms a complete inverter or driver stage with just the transistor package and a load resistor. That matters when you are squeezing a multi-channel interface into a tight layout — the SOT-553 footprint plus the integrated resistors saves real estate versus four discretes. The pre-biased topology also guarantees the base-emitter resistor is always present, so leakage at high temperature stays controlled without a separate resistor on the board.
50 V, 100 mA — signal-level switching, not power
The 50 V VCEO and 100 mA IC maximums place this part firmly in the signal-switching and driver category. It is sized for relay and solenoid drivers, LED indicators, level shifters, and logic interface circuits where the load stays under 100 mA. The 300 mV saturation voltage at 250 µA base drive and 5 mA collector current is tight enough to keep dissipation low in a 100 mW maximum package. That 100 mW total is the package ceiling — split across both transistors, so derate if both sides run near their limits simultaneously.
Active, RoHS compliant — no LTB worry
No end-of-life notification, no last-time-buy pressure.