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

Diodes Incorporated DDTA142TE-7

Name: DDTA142TE-7
Brand: Diodes Incorporated
SKU: DDTA142TE-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDTA142TE-7

Manufacturer:: Diodes Incorporated

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: DDTA142TE-7.pdf

Description:: TRANS PREBIAS PNP 150MW SOT523

Quantity:: RFQ Add To RFQ list

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Inventory:3,176

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Product details

Overview

DDTA142TE-7 from Diodes Incorporated is a PNP pre-biased digital transistor in SOT-523 package, featuring integrated 47 kΩ and 10 kΩ bias resistors (R1 = 47 kΩ, R2 = 10 kΩ), −40 V V_CEO, −100 mA I_C, and −0.3 V V_CE(sat) at −5 mA/−0.25 mA. It functions as a compact, single-device switch for low-power logic-level interfacing in portable battery management circuits.

For engineers reviewing the DDTA142TE-7 datasheet, DDTA142TE-7 pinout, DDTA142TE-7 application, or DDTA142TE-7 equivalent, key selection criteria include verified V_EBO = −5 V, h_FE = 100–600 at I_C = −1 mA, f_T = 200 MHz, guaranteed −100 mA switching capability, and SOT-523 thermal resistance of 625 °C/W on FR4.

Technical Context

This device integrates two precision thin-film resistors (R1 = 47 kΩ, R2 = 10 kΩ) directly on the die to configure base biasing for predictable turn-on/off behavior without external components. Its epitaxial planar construction ensures stable h_FE across temperature and consistent V_CE(sat) ≤ −0.3 V under rated load.

The SOT-523 package enables high-density placement in space-constrained applications while maintaining thermal performance up to 150 °C junction temperature. Complementary NPN types (DDTC series) are available for push-pull or level-shifting topologies requiring matched characteristics.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum collector-emitter voltage before breakdown; supports 3.3 V/5 V rail switching with margin
I_C (max)	−100 mA - Continuous DC collector current rating; suitable for driving LEDs, small relays, or logic inputs
V_CE(sat)	−0.3 V @ −5 mA/−0.25 mA - Low saturation voltage minimizes power loss and heat generation in switching mode
h_FE	100–600 @ I_C = −1 mA - Wide DC current gain range ensures reliable turn-on across process variation
f_T	200 MHz - Gain-bandwidth product confirms suitability for low-speed digital switching (≤10 MHz edge rates)
R1 / R2	47 kΩ / 10 kΩ - Integrated bias network eliminates need for two external resistors; reduces BOM count and layout area
P_D	150 mW - Power dissipation limit at T_A = 25 °C; derates linearly above 25 °C per 625 °C/W R_JA

Pinout & Package

SOT-523 is a miniature surface-mount plastic package (1.60 mm × 0.80 mm × 0.50 mm), lead-free/RoHS compliant, with matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Connected internally to R2; serves as common reference node for bias network and output current return path
2 (Base)	Base connection point	Internally tied between R1 and R2; provides controlled base drive without external resistor network
3 (Collector)	Collector terminal	Main current-carrying output; sinks up to −100 mA when biased via pins 1 and 2

Key Features

Feature	Design Value
Integrated R1/R2 bias network	47 kΩ + 10 kΩ configuration enables direct logic-level input drive without external components
Guaranteed V_EBO	−5 V rating allows safe operation with negative input transients in mixed-signal interfaces
Low V_CE(sat)	−0.3 V at −5 mA/−0.25 mA ensures minimal voltage drop and efficient power delivery in battery-powered systems
High h_FE range	100–600 at I_C = −1 mA supports robust switching across manufacturing spread and temperature
RoHS-compliant packaging	Lead-free matte tin plating over Alloy 42 leadframe meets global environmental compliance requirements

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving indicator LEDs from 3.3 V microcontroller outputs in wearables and IoT sensors.

IC Role / Device Role: PNP digital transistor acting as low-side sink switch with built-in biasing.

Use Value: Eliminates two external resistors per channel, reducing PCB area by >0.5 mm² and improving assembly yield.

Use Scenario: Level-shifting and signal inversion between 1.8 V FPGA I/O banks and 5 V peripheral buses.

IC Role / Device Role: Single-transistor inverter with defined threshold and fast turn-off due to R2 pull-down.

Use Value: Achieves <100 ns propagation delay with no external timing components, simplifying interface design.

Battery Protection Monitoring

USB Port Power Switch

Use Scenario: Enabling/disabling charging path control signals in Li-ion battery packs with overvoltage detection.

IC Role / Device Role: High-impedance input switch isolating protection IC outputs from charger enable lines.

Use Value: −5 V V_EBO withstands transient reverse bias during hot-plug events, preventing latch-up.

Use Scenario: Controlling 5 V VBUS power delivery to downstream USB peripherals in host controllers.

IC Role / Device Role: Low-loss power switch with −0.3 V V_CE(sat) minimizing voltage drop and self-heating.

Use Value: Delivers full 100 mA load current with <30 mW conduction loss, supporting USB 2.0 power budget.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DDTA142JE-7-F	R1 = 47 kΩ, R2 = 10 kΩ, but configured as R1-only type (no R2-to-emitter connection); higher input impedance	Lacks emitter-connected resistor; requires external pull-down for defined off-state in open-collector configurations	Select when precise high-impedance input is needed and external bias control is acceptable
NSV142T1G	Same R1/R2 values, but SOT-416 package (smaller footprint, higher R_JA = 750 °C/W), −30 V V_CEO	Lower voltage rating limits use in 5 V systems with margin; tighter layout constraints due to smaller pad pitch	Choose only if board space is critical and operating voltage stays ≤3.3 V

Compared with DDTA142JE-7-F, DDTA142TE-7 offers guaranteed emitter-biasing for faster turn-off and noise immunity; versus NSV142T1G, it delivers higher voltage margin and superior thermal performance on standard FR4 layouts.

Availability

DDTA142TE-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, battery protection monitoring, and USB port power switching requiring stable component supply and RoHS-compliant sourcing.

Supply support for DDTA142TE-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, specializing in high-reliability, cost-optimized components for consumer, industrial, and computing markets.

The DDTA series targets space- and power-constrained digital switching applications, delivering pre-biased transistor functionality with reduced bill-of-materials and simplified layout for portable and battery-operated electronics.

FAQ

What is the function of the internal 47 kΩ and 10 kΩ resistors in DDTA142TE-7?

The 47 kΩ resistor (R1) connects between base and input, while the 10 kΩ resistor (R2) connects between base and emitter. This configuration provides automatic biasing to ensure reliable turn-on with logic-level inputs and rapid turn-off via emitter pull-down, eliminating external resistors.

Can DDTA142TE-7 replace a standard PNP BJT like BC807 in existing designs?

Yes, but only if the circuit relies on external base resistors. DDTA142TE-7's internal R1/R2 network changes the input impedance and biasing behavior-direct substitution requires removing external resistors and verifying V_EBO and V_CEO margins match system requirements.

Is DDTA142TE-7 suitable for automotive applications?

No. While rated for −55 °C to +150 °C operating temperature, DDTA142TE-7 is not AEC-Q101 qualified and lacks automotive-specific reliability testing, traceability, or PPAP documentation required for vehicle subsystems.

How does the SOT-523 package affect thermal performance in continuous operation?

With R_JA = 625 °C/W on FR4, DDTA142TE-7 dissipates 150 mW at 25 °C ambient. At 100 mW load, junction temperature rises ~62.5 °C above ambient-well within its 150 °C max rating, provided board layout follows Diodes' recommended pad dimensions in AP02001.

DDTA142TE-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:: -

DDTA142TE-7 FAQ

1.How can I place an order for DDTA142TE-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDTA142TE-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 DDTA142TE-7 reliable?

The price and inventory of DDTA142TE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA142TE-7 is usually 5 days.

3.What payment methods are accepted for DDTA142TE-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA142TE-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDTA142TE-7?

DDTA142TE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDTA142TE-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 DDTA142TE-7?

For technical support, including DDTA142TE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA142TE-7 requirements.

6.How does Aetrix verify that DDTA142TE-7 is sourced from the original manufacturer or authorized distributors?

All DDTA142TE-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 DDTA142TE-7 meets industry standards.

7.What is the process for return or replacement of DDTA142TE-7?

All DDTA142TE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA142TE-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 DDTA142TE-7 part is unused and in its original packaging.

Return procedure for DDTA142TE-7:

1.Submit a request within 90 days.

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

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