DTA124ECAT116

Overview

The DTA124ECAT116 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SOT-23-3 (SST3) surface-mount package. It integrates bias resistors to simplify circuit design. Key electrical parameters include a collector-emitter voltage of -20 V and a continuous collector current of -100 mA. The device features a typical input resistance of 22 kOhms and an emitter-base resistance of 22 kOhms. It supports a maximum operating frequency of 250 MHz with a power dissipation rating of 200 mW. The DC current gain is specified at 56 minimum at 5 mA and 5 V, while the saturation voltage is 300 mV max at 500 µA base and 10 mA collector currents.

Feature Summary

• Integrates built-in bias resistors to eliminate external resistor requirements for inverter circuits.
• Provides high-speed switching capability suitable for interface and driver applications.
• Offers compact surface-mount packaging for efficient board space utilization.

Applications

• Inverter circuits
• Interface drivers
• General-purpose switching applications

Procurement Notes

Verify the specific suffix CAT116 against the official datasheet to confirm the tape-and-reel quantity and marking code. Ensure the -20 V rating aligns with system voltage requirements rather than assuming higher ratings from similar model numbers. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement specifications.

Selection Notes

Select this component when a PNP pre-biased transistor with 22 kOhm internal resistors is required in an SOT-23 package. Compare the -20 V collector-emitter voltage limit against the application's supply voltage to ensure adequate headroom. Consider the 200 mW power dissipation limit for thermal management in dense PCB layouts compared to higher-power alternatives.

Part Context

This part belongs to the ROHM DTx series of digital transistors, which combine bipolar junction transistors with integrated biasing networks. The DTA124 variant specifically denotes a PNP configuration with standard 22 kOhm resistor values. It serves as a direct replacement for discrete resistor-transistor combinations in logic interfacing tasks.

Replacement Considerations

DTA124XCAT116 shares identical electrical characteristics but utilizes a different package type. Verify pinout compatibility and thermal performance differences before substitution. Other DTA124 variants may offer different voltage ratings or resistor values requiring circuit re-evaluation.