DTC144EUAT106

Overview

The DTC144EUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-323-3 surface-mount package. It features built-in bias resistors with typical values of 47 kOhms for R1 and 47 kOhms for R2, yielding a resistor ratio of 0.47. The device supports a supply voltage (VCC) of 50 V and a continuous collector current (IC) of 100 mA. Key electrical parameters include a minimum DC current gain (hFE) of 68 at 5 mA and 5 V, a maximum operating frequency of 250 MHz, and power dissipation (Pd) of 200 mW. The emitter-base voltage (VEBO) is rated at 4 V, with a maximum operating temperature of +150°C.

Feature Summary

• Integrates NPN transistor with dual bias resistors to eliminate external input components
• Designed for high-speed switching applications with a 250 MHz operational limit
• Utilizes compact SOT-323-3 packaging for efficient surface-mount assembly

Applications

• General-purpose signal inversion circuits
• Driver stages for low-current loads
• Logic level translation interfaces

Procurement Notes

Verify the specific suffix 'AT106' against the official ROHM datasheet to confirm tape-and-reel specifications and RoHS compliance status. Ensure the ordering part number matches the required packaging quantity and manufacturing date code. Cross-reference the component marking with the manufacturer's identification guide to prevent counterfeit substitution during acquisition.

Selection Notes

Select this component when a single NPN configuration with equal bias resistors is required. The 47 kOhm input resistance suits moderate drive currents. Compare hFE minimums and VCEO ratings against alternative models if higher gain or different voltage thresholds are necessary. Confirm thermal management requirements align with the 200 mW dissipation limit in the target enclosure.

Part Context

This part belongs to the DTC144EUA series of bias resistor built-in transistors. It shares the SOT-323 form factor with other variants like DTC144EU3T106 but differs in internal resistor configurations and grading levels. The 'AEC-Q101' support indicates potential automotive qualification history, though standard industrial grades may vary. It serves as a compact replacement for discrete resistor-transistor networks.

Replacement Considerations

DTC144EU3T106 is listed as a similar level part with the same pinout and package. Verify internal resistor tolerances and hFE ranges before substitution. Other family members like DTC144WUAT106 offer different resistor ratios and should be evaluated based on specific circuit impedance requirements.