DTC143XCAT116

Overview

The DTC143XCAT116 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-23-3 (SST3) surface-mount package. It integrates bias resistors with typical values of R1=4.7 kΩ and R2=10 kΩ, yielding a ratio of 2.1. Key electrical parameters include a collector-emitter breakdown voltage (VCEO) of 50 V, continuous collector current (Ic) of 100 mA, and DC current gain (hFE) minimum of 30 at 10 mA/5 V. The device features a transition frequency (fT) of 250 MHz, power dissipation (Pd) of 350 mW, and operates up to +150°C.

Feature Summary

• Integrates bias resistors to simplify circuit design without external components
• High-speed switching capability with 250 MHz transition frequency
• Compact SOT-23-3 surface-mount packaging for space-constrained applications

Applications

• Inverter circuits requiring built-in biasing
• General-purpose switching applications
• Digital logic interface buffering

Procurement Notes

Verify the specific suffix 'CAT116' against the manufacturer's official datasheet to confirm resistor values and tolerance specifications. Ensure the ordering code matches the required RoHS compliance status and tape-and-reel quantity. Cross-reference the SST3 package designation with standard SOT-23-3 footprints during PCB layout validation.

Selection Notes

Select this component when a single NPN digital transistor with integrated biasing is required for low-current switching. The 4.7 kΩ input resistor suits standard logic levels. Compare hFE and fT requirements against alternative models like DTC143ECA if different resistor ratios are needed. Confirm thermal management capabilities for Pd of 350 mW in the target enclosure.

Part Context

This part belongs to the ROHM DTx series of digital transistors, which combine bipolar junction transistors with internal bias networks. The DTC143X variant specifically denotes an NPN configuration with a resistor ratio of 2.1. It serves as a direct replacement for discrete resistor-transistor combinations in signal inversion and level-shifting roles.

Replacement Considerations

Compatible substitutes within the same family include DTC143ECA (ratio 1) and DTC143ZCA (ratio 10). Verify pinout compatibility and electrical ratings before substitution. PNP equivalents such as DTA143XCAT116 require circuit polarity adjustments.