DTA123ECAT116

Overview

The DTA123ECAT116 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors to simplify circuit design. It operates with a collector-emitter voltage (VCEO) of -50 V and a continuous collector current (IC) of -100 mA. The device includes an input resistor (R1) of 2.2 kΩ and an emitter-base resistor (R2) of 2.2 kΩ. Power dissipation is rated at 0.2 W. It is housed in an SST-3 package (SOT-23) with three terminals, suitable for surface mount applications.

Feature Summary

• Integrates bias resistors internally to eliminate the need for external input resistors in inverter circuits.
• Utilizes thin-film resistors for complete isolation, allowing negative biasing of the input.
• Minimizes parasitic effects due to the specific construction of the internal bias resistors.

Applications

• Inverter circuits requiring simplified input configurations.
• General-purpose switching applications in consumer electronics.
• Logic interface circuits where space-saving SMD packages are required.

Procurement Notes

Verify the exact suffix AT116 against the manufacturer's latest datasheet to confirm packaging details and tape-and-reel specifications. Ensure compatibility with RoHS directives if required by the target application. Cross-reference the SST-3 package dimensions with PCB footprint libraries before finalizing design integration.

Selection Notes

Select this component when a PNP digital transistor with 2.2 kΩ input resistance is needed. Compare with DTA123YCA or DTA124ECA if different resistor ratios or gain characteristics are required. Verify that the -50 V rating and -100 mA current limit meet the specific load requirements of the target circuit design.

Part Context

This part belongs to the DTA series of bias resistor-built-in transistors from ROHM Semiconductor. These devices are designed to replace discrete transistor-resistor combinations, reducing board space and assembly complexity. The DTA123EC variant specifically denotes the PNP polarity with 2.2 kΩ/2.2 kΩ resistor configuration.

Replacement Considerations

DTA123YCA offers similar electrical characteristics but with a different resistor ratio (2.2 kΩ/10 kΩ). DTA124ECA provides a 2.2 kΩ/2.2 kΩ configuration but may have different gain specifications. Verify pinout and thermal performance before substitution.