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Product Detailed Parameters
- Description：TRANS PREBIAS NPN 200MW SOT323
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT)
- Resistors Included：R1 Only
- Transistor Type：NPN - Pre-Biased
- Current - Collector (Ic) (Max)：100 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 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic：300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max)：500nA
- Frequency - Transition：200 MHz
- Power - Max：200 mW
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-70, SOT-323
- Supplier Device Package：SOT-323
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Overview
The DDTC142TU-7 is an obsolete NPN pre-biased surface mount transistor manufactured by Diodes Incorporated. It features a built-in biasing resistor R1 of 0.47 kΩ with an open R2 configuration, housed in an SOT-323 package. The device supports a maximum collector-emitter voltage (BVCEO) of 40 V and a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with an operating temperature range from -55°C to +150°C. The DC current transfer ratio (hFE) ranges from 100 to 600, and the gain-bandwidth product is typically 200 MHz.
Feature Summary
- Epitaxial planar die construction for reliable performance
- Integrated single biasing resistor simplifies circuit design
- Totally lead-free and fully RoHS compliant
- Halogen and antimony free green device
Applications
- General purpose switching applications
- Driver circuits for low-power loads
- Logic level translation interfaces
Procurement Notes
This component is officially marked as obsolete and discontinued by the manufacturer. Standard supply channels no longer support active production or distribution. Engineers must verify end-of-life status before finalizing designs. Alternative sourcing may involve third-party distributors holding surplus stock, though authenticity and traceability cannot be guaranteed through official Diets Incorporated channels.
Selection Notes
Designers should evaluate the specific electrical characteristics of this obsolete part against current available alternatives. The fixed 0.47 kΩ internal resistor limits flexibility compared to programmable bias networks. Verify that replacement components match the required SOT-323 footprint and pinout compatibility to ensure seamless integration into existing PCB layouts without redesign.
Part Context
The DDTC142TU-7 belongs to the DDTC (LO-R1) U series of NPN pre-biased transistors. This series integrates a single base resistor to reduce external component count. The TU suffix indicates the specific resistance value and open emitter resistor configuration within the family. It is designed for compact surface-mount applications requiring simple digital switching functions.
Replacement Considerations
Direct substitutes include DDTC142JU-7-F and DDTC122TU-7-F from the same series. Other compatible options are DDTA143EE and MMUN2213LT1G. Verify pinout alignment and electrical parameters such as VCEO and hFE when selecting cross-references.
