Diodes Incorporated DDTC114TUA-7-F

Overview

DDTC114TUA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor with a single integrated 10 kΩ base bias resistor (R1 only), housed in a SOT323 surface-mount package. It supports 50 V V_CEO, 100 mA I_C, 200 mW power dissipation, and delivers h_FE of 100–600 at I_C = 1 mA, V_CE = 5 V. It is used in compact logic-level interface circuits for microcontroller-driven LED drivers and signal switching.

For engineers reviewing the DDTC114TUA-7-F datasheet, DDTC114TUA-7-F pinout, DDTC114TUA-7-F application, or DDTC114TUA-7-F equivalent, key selection criteria include verified R1 = 10 kΩ tolerance (±30%), V_CE(sat) ≤ 0.3 V at I_C/I_B = 10 mA/1 mA, thermal resistance R_θJA = 625 °C/W on FR4, and AEC-Q101 qualification readiness for automotive signal conditioning.

Technical Context

This device integrates a single precision bias resistor (R1 = 10 kΩ ±30%) directly between base and supply rail, eliminating external bias components in low-power NPN switching applications. Its epitaxial planar die construction ensures stable h_FE across temperature (−55°C to +150°C) and repeatable V_CE(sat) performance under I_C/I_B ratios from 10 to 100.

The SOT323 package enables high-density placement in space-constrained PCBs while maintaining 200 mW power handling and 625 °C/W junction-to-ambient thermal resistance when mounted per recommended pad layout. It operates reliably in ambient temperatures up to +150°C and meets J-STD-020 moisture sensitivity Level 1.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), lead-free, RoHS 3 compliant, halogen- and antimony-free "Green" compound rated UL 94V-0.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN pre-biased transistor applications.

Compared with NSBC114T1G and DXTN114TK, DDTC114TUA-7-F uniquely balances ultra-small SOT323 size, guaranteed h_FE ≥100, and tight V_CE(sat) specification-making it optimal for space-limited, gain-sensitive logic interface designs.

Availability

DDTC114TUA-7-F is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and automotive door module signal conditioning requiring stable component supply and long-term production continuity.

Supply support for DDTC114TUA-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, automotive, and consumer markets.

This part belongs to the DDTC R1-only series of pre-biased transistors, designed specifically to reduce component count and PCB area in digital interface and low-power switching applications.

FAQ

What is the exact value and tolerance of the internal bias resistor R1?

The internal base bias resistor R1 is precisely 10 kΩ with a tolerance of ±30%, as confirmed in the DS30323 Rev. 9 datasheet Electrical Characteristics table. This value is laser-trimmed during wafer sort and remains stable over temperature (−55°C to +150°C) and lifetime.

Is DDTC114TUA-7-F qualified to AEC-Q101?

DDTC114TUA-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation; however, it is not currently listed as AEC-Q101-qualified in Diodes' official product definitions. Customers requiring formal qualification should contact Diodes' automotive team for change-controlled versions.

Can this transistor replace a standard 2N3904 with external bias resistors?

Yes-it replaces a 2N3904 plus two external resistors (base pull-up and base current-limiting) in common-emitter switch configurations. The integrated R1 simplifies layout and improves consistency, though design must account for fixed 10 kΩ bias versus adjustable external values.

What is the maximum allowable continuous collector current at 100°C ambient?

At T_A = 100°C, derating per Figure 1 reduces P_D to ~80 mW. Using V_CE(sat) ≤ 0.3 V, maximum continuous I_C is approximately 267 mA-but absolute maximum rating remains 100 mA per Absolute Maximum Ratings table; thus, I_C must be limited to 100 mA regardless of thermal headroom.