Diodes Incorporated DDTC123JE-7-F

Overview

DDTC123JE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated R1 = 2.2 kΩ and R2 = 47 kΩ bias resistors, V_CEO = 50 V, I_C(max) = 100 mA, and DC current gain (h_FE) ≥ 80 at I_C = 10 mA - used for level-shifting and digital switching in compact logic interface circuits.

For engineers reviewing the DDTC123JE-7-F datasheet, DDTC123JE-7-F pinout, DDTC123JE-7-F application, or DDTC123JE-7-F equivalent, this page delivers verified electrical specs, SOT523 terminal mapping, real-world use cases in automotive body control modules and industrial I/O drivers, and validated alternative parts with documented R1/R2 and gain differences.

Technical Context

This device integrates a single NPN bipolar transistor with two non-matching on-die base bias resistors (R1 = 2.2 kΩ, R2 = 47 kΩ), enabling direct TTL/CMOS-compatible input drive without external components. It operates as a saturated switch with guaranteed V_CE(sat) ≤ 0.3 V at I_C = 5 mA / I_B = 0.25 mA.

The R1 ≠ R2 architecture provides higher input impedance and improved noise immunity versus R1 = R2 types, while maintaining fast turn-on (t_on < 35 ns) and turn-off (t_off < 250 ns) times per typical curves. f_T = 250 MHz supports high-speed digital switching up to ~10 MHz.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin-plated leads, RoHS 3 and halogen-free compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC123YE-7-F and DDTC143XE-7-F, DDTC123JE-7-F uniquely balances input drive strength (7.2 mA), noise immunity (V_I(off) = 0.5 V), and saturation performance (V_CE(sat) ≤ 0.3 V), making it optimal for general-purpose 3.3/5 V logic interfacing where reliability and layout simplicity are prioritized over extreme speed or ultra-low quiescent current.

Availability

DDTC123JE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart home sensor hubs requiring stable component supply and long-term manufacturability.

Supply support for DDTC123JE-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 automotive, industrial, and consumer markets.

This part belongs to the DDTC (R1≠R2 SERIES) E family - engineered specifically for simplified digital switching in space-constrained, noise-sensitive applications where traditional resistor-biased transistors add cost and layout complexity.

FAQ

What is the maximum operating temperature for DDTC123JE-7-F?

The device is rated for junction and storage temperatures from –55°C to +150°C. Its thermal resistance (R_θJA = 833°C/W) means that at 150 mW power dissipation on a standard FR-4 board, junction temperature rises ~125°C above ambient - limiting safe continuous operation to ≤ +25°C ambient unless heatsinking or airflow is added.

Can DDTC123JE-7-F replace a standard 2N3904 with external bias resistors?

Yes - it replaces a 2N3904 plus two discrete resistors (2.2 kΩ and 47 kΩ) in series between base and V_CC, providing identical biasing behavior with reduced layout area and improved consistency. No changes to logic-level drive voltage or load configuration are needed.

Is DDTC123JE-7-F suitable for automotive applications?

The base silicon is AEC-Q101 qualified; however, DDTC123JE-7-F itself is not automotive-grade unless ordered with automotive-specific part marking and packaging. Customers requiring PPAP documentation or IATF 16949 traceability must specify the automotive variant (e.g., DDTC123JE-7-F-AU).

What does the "N06" marking on the SOT523 package indicate?

"N06" is the top-side product code per Diodes' marking system: "N" denotes the DDTC R1≠R2 series, and "06" identifies the specific R1/R2 combination (2.2 kΩ / 47 kΩ). It is not a date code - the date code appears separately as a two-character alphanumeric (e.g., "M2" for February 2025).