DTD123YCT116

Overview

The DTD123YCT116 is an NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within a compact SOT-23 (SST3) surface-mount package. It supports a collector-emitter voltage of 50V and a continuous collector current of 500mA, with a power dissipation rating of 200mW. The device incorporates thin-film resistors for complete isolation, allowing negative input biasing while minimizing parasitic effects. Key electrical parameters include a typical input resistance of 2.2 kOhms, an emitter-base resistance of 10 kOhms, and a maximum operating frequency of 200 MHz. The unit operates within a temperature range of -55°C to +150°C.

Feature Summary

• Built-in bias resistors enable inverter circuit configuration without external input components
• Thin-film resistor construction provides complete isolation for negative input biasing
• Minimized parasitic effects due to integrated resistor design

Applications

• Inverter circuits requiring simplified input stages
• General-purpose switching applications in consumer electronics
• Logic interface circuits for microcontroller I/O expansion

Procurement Notes

Verify the specific suffix 'T116' corresponds to the required tape-and-reel packaging format containing 3000 units per reel. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SST3 package dimensions align with the target PCB footprint constraints during the layout phase.

Selection Notes

Select this component when an NPN digital transistor with 50V breakdown and 500mA current capacity is required in a small SOT-23 form factor. The 2.2kOhm input resistance suits standard logic levels. Consider alternative polarity or resistance values if the application demands PNP configuration or different biasing characteristics.

Part Context

This part belongs to the DTx series of digital transistors from ROHM Semiconductor. These devices integrate bipolar junction transistors with pre-biased resistors to simplify circuit design. The DTD123YCT116 specifically denotes the NPN variant with defined resistor ratios housed in the SST3 package, distinguishing it from other polarity or resistance combinations within the same family.

Replacement Considerations

Direct substitutes with identical pinout and specifications include DTD123EC and DTD123ECHZGT116. Verify that replacement parts maintain the same 50V VCEO rating and 500mA Ic limit. Ensure the substitute also utilizes the SOT-23/SST3 package for mechanical compatibility.