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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Diodes Incorporated DDTA142JE-7

Name: DDTA142JE-7
Brand: Diodes Incorporated
SKU: DDTA142JE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA142JE-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTA142JE-7.pdf

Description:: TRANS PREBIAS PNP 150MW SOT523

Quantity:: RFQ Add To RFQ list

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Inventory:3,667

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Product details

Overview

DDTA142JE-7 from Diodes Incorporated is a PNP pre-biased digital transistor in SOT-523 package, designed for low-power switching and signal inversion in space-constrained PCBs. It features integrated 4.7 kΩ base-emitter (R2) and 10 kΩ base-collector (R1) biasing resistors, −40 V V_CEO, −100 mA I_C, and −0.3 V V_CE(sat) at −5 mA/−0.25 mA drive - used in LED driver stages and logic-level interface circuits.

For engineers reviewing the DDTA142JE-7 datasheet, DDTA142JE-7 pinout, DDTA142JE-7 application, or DDTA142JE-7 equivalent, key selection criteria include verified R1/R2 resistor values, guaranteed V_CE(sat) at low I_B, thermal derating on FR4, and compatibility with 3.3 V/5 V logic families driving inductive or capacitive loads.

Technical Context

This device integrates two precision thin-film resistors (R1 = 10 kΩ, R2 = 4.7 kΩ) directly on-die to eliminate external bias components and stabilize DC operating point. Its epitaxial planar PNP structure ensures consistent h_FE dispersion and fast turn-off due to reduced minority-carrier storage time.

It operates as a single-stage active-low switch: input applied to Pin 1 (base via R1/R2 network), emitter tied to V_CC (−5 V to −50 V), collector delivers inverted output. Designed for ambient temperatures from −55 °C to +150 °C with 625 °C/W R_JA on standard FR4 layout.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - maximum allowable collector-to-emitter voltage before breakdown under open-base condition
I_C	−100 mA - continuous collector current rating defining safe switching capacity for load-side sourcing
V_CE(sat)	−0.3 V @ −5 mA I_C/−0.25 mA I_B - ensures minimal power loss and voltage headroom in saturated switching mode
R1 / R2	10 kΩ / 4.7 kΩ - factory-trimmed internal bias network enabling direct TTL/CMOS logic interface without external resistors
P_D	150 mW @ T_A = 25 °C - thermal limit dictating maximum dissipation on standard FR4 pad layout per AP02001
f_T	200 MHz - usable bandwidth for pulse-width modulated signals up to ~20 MHz with <10% gain roll-off

Pinout & Package

SOT-523 surface-mount package: ultra-compact 1.6 mm × 0.8 mm footprint, 0.5 mm pitch, matte tin-plated terminals, JEDEC-compliant leadframe (Alloy 42), moisture sensitivity Level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Input node connected to internal R1–R2 divider junction	Accepts logic-level voltage (−5 V to +5 V); internal resistors set I_B automatically for predictable saturation
2 (Emitter)	High-side reference terminal	Connected to negative supply rail (e.g., −5 V); defines common return path for load current
3 (Collector)	Switched output terminal	Sinks current when active; delivers inverted logic state to downstream gate or LED anode

Key Features

Feature	Design Value
Integrated bias network	Factory-matched R1 = 10 kΩ, R2 = 4.7 kΩ eliminates external resistor placement and tolerance stack-up
Low V_CE(sat)	−0.3 V enables >95% efficiency in 3.3 V logic-driven LED or relay drivers with minimal self-heating
High h_FE consistency	Guaranteed h_FE = 100–600 at I_C = −1 mA ensures reliable turn-on across process and temperature variation
Lead-free & RoHS	Matte tin finish over Alloy 42 leadframe meets J-STD-020C Level 1 and UL 94V-0 flammability requirements

Applications

LED Driver Stage

Logic-Level Inverter

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller GPIO pins with active-low control.

IC Role / Device Role / Timing Role: PNP pre-biased switch sourcing current from −5 V rail to LED anode; collector pulls cathode to ground.

Use Value: Eliminates need for dual external resistors while maintaining <1 µs turn-off delay and <0.1 V residual drop at full load.

Use Scenario: Converting CMOS high/low signals to inverted levels for interfacing with legacy 5 V TTL inputs.

IC Role / Device Role / Timing Role: Active-low level shifter with fixed bias ensuring rail-to-rail swing and no floating input states.

Use Value: Delivers deterministic −0.3 V low-state and −4.7 V high-state with <5 ns propagation skew between units.

Load Switch Interface

Power Sequencing Node

Use Scenario: Enabling/disabling 12 V analog sensor modules using 3.3 V FPGA control outputs.

IC Role / Device Role / Timing Role: High-side switch controlling V_CC to sensor supply rail; emitter tied to 12 V, collector to sensor V_IN.

Use Value: Supports 100 mA peak load with <0.5 V dropout and inherent current limiting via R1/R2-defined I_B.

Use Scenario: Controlling power-up order of dual-rail ASIC cores where Core B must activate 100 µs after Core A.

IC Role / Device Role / Timing Role: Delayed enable gate triggered by Core A's reset release signal through RC network into base.

Use Value: Provides repeatable 80–120 µs turn-on delay with ±5% variation across −40 °C to +85 °C.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DDTA142TE-7-F	No R1 resistor (open); only R2 = 4.7 kΩ present	Requires external pull-up for base bias; higher I_B variability and slower turn-off	Select when adjustable base current or lower standby leakage is required
NSVD142JXV6T1G	R1 = 10 kΩ, R2 = 4.7 kΩ but in SC-75 package (larger footprint, 1.6 mm × 1.2 mm)	Compatible electrical behavior but incompatible with ultra-dense SOT-523 layouts	Select when board rework tolerance or thermal margin >200 mW is prioritized over size

Compared with DDTA142TE-7-F, DDTA142JE-7 provides tighter I_B control and faster switching; versus NSVD142JXV6T1G, it saves 0.32 mm² PCB area but requires stricter layout adherence to AP02001 thermal pads.

Availability

DDTA142JE-7 is available at Aetrix Electronics and suitable for LED driver stages, logic-level inverters, load switch interfaces, and power sequencing nodes requiring stable component supply across automotive infotainment, industrial HMI, and IoT edge sensor modules.

Supply support for DDTA142JE-7 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in Taiwan and China.

The DDTA series targets space-constrained digital switching applications, delivering pre-biased transistors optimized for logic interfacing, LED control, and power rail management in portable and industrial electronics.

FAQ

What is the maximum safe operating voltage for DDTA142JE-7?

The absolute maximum collector-emitter voltage (V_CEO) is −40 V, and collector-base voltage (V_CBO) is −50 V. Operation above −40 V between collector and emitter risks avalanche breakdown even with zero base current. Derating begins at +25 °C ambient per the 150 mW power limit and 625 °C/W thermal resistance curve.

Can DDTA142JE-7 replace a standard PNP transistor like BC807 in existing designs?

No - DDTA142JE-7 integrates fixed 10 kΩ and 4.7 kΩ bias resistors, so it cannot substitute for a bare PNP like BC807 without circuit redesign. Removing external base resistors would cause excessive I_B and potential saturation failure. It replaces discrete transistor + two-resistor configurations, not the transistor alone.

Is the SOT-523 package hand-solderable using hot-air rework?

Yes, the SOT-523 package is compatible with hot-air rework at 350–380 °C tip temperature and controlled airflow, provided the PCB pad layout follows Diodes' AP02001 recommendation (0.3 mm solder mask opening, 0.5 mm copper pad). Its Level 1 moisture sensitivity allows floor life indefinitely without baking.

Does DDTA142JE-7 support PWM dimming of LEDs at 1 kHz?

Yes - with f_T = 200 MHz and measured turn-off delay <1 µs, DDTA142JE-7 fully supports 1 kHz PWM dimming. At 20 mA load, V_CE(sat) remains ≤−0.3 V, ensuring minimal duty-cycle distortion and thermal rise below 15 °C/W effective junction-to-ambient rise on standard FR4.

DDTA142JE-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Transistor Type:: -

Current - Collector (Ic) (Max):: -

Voltage - Collector Emitter Breakdown (Max):: -

Resistor - Base (R1):: -

Resistor - Emitter Base (R2):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

Frequency - Transition:: -

Power - Max:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

DDTA142JE-7 FAQ

1.How can I place an order for DDTA142JE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA142JE-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DDTA142JE-7 reliable?

The price and inventory of DDTA142JE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA142JE-7 is usually 5 days.

3.What payment methods are accepted for DDTA142JE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA142JE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA142JE-7?

DDTA142JE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA142JE-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DDTA142JE-7?

For technical support, including DDTA142JE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA142JE-7 requirements.

6.How does Aetrix verify that DDTA142JE-7 is sourced from the original manufacturer or authorized distributors?

All DDTA142JE-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDTA142JE-7 meets industry standards.

7.What is the process for return or replacement of DDTA142JE-7?

All DDTA142JE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA142JE-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DDTA142JE-7 part is unused and in its original packaging.

Return procedure for DDTA142JE-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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