My Inquiry
My Account
Diodes Incorporated DDTD142TU-7-F
- Part No.:
- DDTD142TU-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTD142TU-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,115
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDTD142TU-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT323 package, featuring a single 470 Ω base resistor (R1), open-emitter configuration, 40 V VCEO, 500 mA IC, and hFE of 100–600 at IC = 5 mA. It serves as a compact, surface-mount digital switch in low-voltage logic interface circuits.
For engineers reviewing the DDTD142TU-7-F datasheet, DDTD142TU-7-F pinout, DDTD142TU-7-F application, or DDTD142TU-7-F equivalent, key selection criteria include its R1-only biasing topology, absence of R2, guaranteed VCE(sat) ≤ 0.3 V at 50 mA/2.5 mA, and JEDEC-qualified reliability for industrial control and consumer electronics signal switching.
Technical Context
This device implements a monolithic NPN transistor with integrated base bias resistor only - no emitter resistor (R2 = open) - enabling direct TTL/CMOS-compatible input drive without external pull-down. Its 40 V VCEO and 500 mA IC rating support robust switching in 3.3 V and 5 V logic-controlled loads.
The hFE range of 100–600 ensures consistent current gain across production lots at IC = 5 mA and VCE = 5 V, while fT = 200 MHz confirms suitability for moderate-speed digital switching up to ~10 MHz edge rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum collector-emitter voltage before breakdown; supports 3.3 V/5 V rail-switching with margin. |
| IC | 500 mA - Continuous collector current capability; enables driving LEDs, small relays, or MOSFET gates. |
| VCE(sat) | ≤ 0.3 V @ IC = 50 mA, IB = 2.5 mA - Low saturation voltage minimizes power loss and self-heating in on-state. |
| hFE | 100–600 @ IC = 5 mA, VCE = 5 V - Wide DC current gain range ensures reliable turn-on across process variation. |
| R1 | 470 Ω - Integrated base resistor enables direct logic-level input connection; eliminates need for external bias network. |
| PD | 250 mW @ TA = 25°C - Power dissipation limit on FR4 PCB defines thermal derating envelope for continuous operation. |
| fT | 200 MHz - Gain-bandwidth product confirms adequate high-frequency response for digital switching below 10 MHz. |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), lead-free, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Connected internally to package substrate; externally accessible for grounding or load return path. |
| 2 (Base) | Base terminal | Connected to internal 470 Ω resistor; accepts logic-level input (0–5 V) to control transistor conduction. |
| 3 (Collector) | Collector terminal | High-side switching node; connects to load supply rail (up to 40 V) and switched load. |
Key Features
| Feature | Design Value |
|---|---|
| Single integrated base resistor (R1) | 470 Ω - Enables direct CMOS/TTL drive without external components; reduces BOM count and layout area. |
| Open-emitter configuration | R2 = open - Allows flexible emitter termination (e.g., grounded or pulled-up), supporting high-side or low-side switch topologies. |
| JEDEC-qualified reliability | Qualified per AEC-Q standards for high-reliability applications - ensures stable parametric performance over temperature and lifetime. |
| SOT323 footprint | 0.65 mm pitch, 2.15 mm × 2.10 mm body - Compatible with standard pick-and-place equipment and reflow profiles; supports high-density PCB layouts. |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) - Meets global environmental compliance requirements. |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving discrete indicator LEDs from 3.3 V microcontroller outputs with current limiting via external series resistor. IC Role / Device Role: Low-side digital switch controlling LED cathode path to ground. Use Value: Eliminates need for discrete base resistor; VCE(sat) ≤ 0.3 V ensures >90% efficiency in LED forward voltage utilization. |
Use Scenario: Extending limited GPIO count by switching higher-current peripherals (e.g., sensors, displays) using MCU output pins. IC Role / Device Role: Level-shifting and current-boosting buffer between low-drive MCU pin and 5 V peripheral enable line. Use Value: hFE ≥ 100 guarantees full saturation at 2.5 mA base drive, enabling reliable 50 mA load switching from 3.3 V logic. |
| Power Sequencing Control | Industrial Sensor Interface |
Use Scenario: Enabling auxiliary power rails (e.g., 3.3 V analog supply) only after main 5 V rail stabilizes, using supervisor IC output. IC Role / Device Role: Controlled high-side switch activating downstream LDO or regulator enable input. Use Value: 40 V VCEO accommodates 5 V rail with margin; R1-only bias simplifies timing-critical enable path design. |
Use Scenario: Isolating and conditioning digital status signals (e.g., fault flags) from industrial sensors operating at different supply domains. IC Role / Device Role: Voltage-level translator and noise-immune signal conditioner between sensor output and PLC input module. Use Value: Open-emitter configuration allows pull-up to PLC's 24 V logic rail; 500 mA IC withstands transient ESD coupling events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTD142JU-7-F | Includes both R1 (470 Ω) and R2 (10 kΩ); emitter resistor pulls base to emitter when input floats. | Preferred where input may be unconnected or high-impedance during power-up; provides defined off-state. | Select when guaranteed turn-off during undefined logic states is required; not drop-in due to added R2 path. |
| NSV142TUT1G | Same R1 = 470 Ω, but R2 = open; identical hFE (100–600), VCEO = 40 V, and SOT-323 package. | Direct functional replacement with identical biasing and electrical specs; qualified to AEC-Q101. | Choose for automotive-grade qualification; same footprint and pinout, fully interchangeable in non-automotive designs. |
Compared with DDTD142JU-7-F, DDTD142TU-7-F offers simpler biasing for driven inputs, while NSV142TUT1G provides AEC-Q101 qualification without changing circuit behavior - making it ideal for upgrading legacy industrial designs to automotive-compliant supply chains.
Availability
DDTD142TU-7-F is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for DDTD142TU-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to Diodes' LO-R1 family of pre-biased transistors, engineered specifically for space-constrained, high-volume digital switching applications in consumer, computing, and industrial electronics.
FAQ
What is the function of the "open" R2 in DDTD142TU-7-F?
The "open" R2 means no internal emitter-base resistor is present - only the 470 Ω base resistor (R1) is integrated. This configuration requires the external circuit to define the emitter connection (e.g., grounded for low-side switching), giving designers full control over biasing and enabling both high-side and low-side topologies without unintended leakage paths.
Can DDTD142TU-7-F replace a standard NPN transistor like BC847?
Yes, but only when the application uses active logic-level drive and does not require guaranteed turn-off during floating inputs. Unlike BC847, DDTD142TU-7-F integrates R1 = 470 Ω, eliminating the need for an external base resistor - however, it cannot substitute in circuits relying on base-emitter shorting or variable bias networks.
Is DDTD142TU-7-F suitable for automotive applications?
No - DDTD142TU-7-F is not AEC-Q101 qualified. For automotive use, Diodes recommends the pin-compatible NSV142TUT1G (AEC-Q101 qualified) or Q-suffix variants like DDTD142TUQ-7-F, which undergo additional stress testing and are manufactured in IATF 16949-certified facilities.
What is the maximum safe operating frequency for switching with DDTD142TU-7-F?
While fT = 200 MHz indicates high-frequency capability, practical digital switching is limited by stored charge and package parasitics. For clean 10 ns rise/fall times and minimal overshoot, operation up to 5–10 MHz is recommended - verified by typical VCE switching waveforms in the DS30398 datasheet under 50 mA resistive load conditions.
DDTD142TU-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 470 Ohms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTD142TU-7-F FAQ
1.How can I place an order for DDTD142TU-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD142TU-7-F 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 DDTD142TU-7-F reliable?
The price and inventory of DDTD142TU-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTD142TU-7-F is usually 5 days.
3.What payment methods are accepted for DDTD142TU-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD142TU-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD142TU-7-F?
DDTD142TU-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD142TU-7-F 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 DDTD142TU-7-F?
For technical support, including DDTD142TU-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD142TU-7-F requirements.
6.How does Aetrix verify that DDTD142TU-7-F is sourced from the original manufacturer or authorized distributors?
All DDTD142TU-7-F 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 DDTD142TU-7-F meets industry standards.
7.What is the process for return or replacement of DDTD142TU-7-F?
All DDTD142TU-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTD142TU-7-F, 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 DDTD142TU-7-F part is unused and in its original packaging.
Return procedure for DDTD142TU-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTD142TU-7-F Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
