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DDTC144EUAQ-7-F

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Diodes Incorporated Digital Transistors, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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DDTC144EUAQ-7-F

Diodes Incorporated · Digital Transistors · SOT-323

DDTC144EUAQ-7-F from Diodes Incorporated, in a SOT-323. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IN input Input (base) through R1 to the transistor; input voltage pin 1 to pin 2 is rated -10 to +40 V for DDTC144EUA.
2 GND (0) power_in Ground (emitter) reference pin for the input and supply voltages, which are specified relative to pin 2.
3 OUT output Output (collector) of the pre-biased NPN transistor; supply voltage pin 3 to pin 2 is rated 50 V max with output current up to 100 mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-323
Category Triode/MOS Tube/Transistor
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage (OFF) Vl(OFF) 1.1 0.5 V VCC = 5V, IO = 100µA 2
Input Voltage (ON) Vl(ON) 1.4 3 V VO = 0.3V, IO = 2mA, DDTC144EUA 2
Output Voltage VO(ON) 0.1 0.3 V IO/Il = 10mA/0.5mA, DDTC144EUA 2
Input Current Il 0.18 mA VI = 5V 2
Output Current (off) IO(OFF) 0.5 µA VCC = 50V, VI = 0V 2
DC Current Gain Gl 80 VO = 5V, IO = 5mA, DDTC144EUAQ 2
Input Resistor (R1) Tolerance R1 -30 30 % 2
Resistance Ratio R2/R1 0.8 1 1.2 2
Nominal R1, R2 R1, R2 47 kΩ DDTC144EUA nominal 1
Gain-Bandwidth Product fT 250 MHz VCE = 10V, IE = 5mA, f = 100MHz 2
Supply Voltage VCC 50 V Pin 3 to 2, TA = +25°C 2
Input Voltage VIN -10 40 V Pin 1 to 2, DDTC144EUA 2
Output Current IO 100 mA DDTC144EUA 2
Output Current All IC(MAX) 100 mA 2
Power Dissipation PD 200 mW Note 6, FR-4 PC board minimum pad 2
Thermal Resistance, Junction to Ambient RθJA 625 C/W Note 6, FR-4 PC board minimum pad 2
Operating and Storage Temperature Range TJ, TSTG -55 150 C 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 1

CAD (KiCad official)

  • Symbol: DDTC144EUAQ-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: ddtc144euaq-7-f-etched.step / ddtc144euaq-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ddtc144euaq-7-f.step / ddtc144euaq-7-f.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 aaf1276e48864742, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF