DTB122JKT146

Overview

The DTB122JKT146 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within an SMT3 package. It supports a supply voltage of -50 V and a continuous collector current of -500 mA with a power dissipation rating of 200 mW. The device incorporates thin-film resistors for complete isolation, eliminating parasitic effects. Key electrical parameters include a minimum DC current gain (GI) of 47 at -50 mA/-2.5 mA, a transition frequency (fT) of 200 MHz, and an input resistance (R1) typically ranging from 154 to 286 Ohms.

Feature Summary

• Built-in bias resistors enable inverter circuit configuration without external input components.
• Thin-film resistor technology provides complete isolation to eliminate parasitic effects.
• Simplified design process requiring only on/off condition settings.

Applications

• Audio visual equipment
• Office automation equipment
• Communications devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and availability status. Ensure that the component meets the required environmental standards for the intended application before finalizing procurement orders.

Selection Notes

Select this component for applications requiring simplified biasing circuits where high mounting density is necessary. Consider the negative polarity requirements and the specific input resistance values when designing peripheral circuits to ensure proper logic level interfacing.

Part Context

This part belongs to the DTB122JK series of digital transistors produced by ROHM Semiconductor. The series is designed for general-purpose electronic equipment, offering integrated solutions for switching applications with reduced board space requirements compared to discrete transistor configurations.

Replacement Considerations

Consult the manufacturer's replacement guide for verified substitute part numbers. Ensure any alternative component matches the SMT3 package dimensions and electrical characteristics such as voltage ratings and current gains.

FAQ

What is the typical resistance ratio between R2 and R1?

The resistance ratio (R2/R1) typically ranges from 17.1 to 25.6.

What is the maximum storage temperature range?

The storage temperature range is -55°C to +150°C.

How does the device handle input biasing?

It uses built-in thin-film bias resistors that allow positive biasing of the input while minimizing parasitic effects.