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Diodes Incorporated DDTA123YCA-7
- Part No.:
- DDTA123YCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTA123YCA-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,001
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Product details
Overview
DDTA123YCA-7 from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1=2.2kΩ and R2=10kΩ bias resistors. It delivers -100mA max output current, -3.0V input turn-on voltage at -20mA load, and DC current gain (hFE) of 33 at -10mA collector current. It is used in low-power digital switching circuits such as LED drivers and microcontroller I/O interface protection.
For engineers reviewing the DDTA123YCA-7 datasheet, DDTA123YCA-7 pinout, DDTA123YCA-7 application, or DDTA123YCA-7 equivalent, key selection criteria include verified input resistor values (R1/R2), guaranteed VIN(ON) threshold under defined IOUT, thermal derating behavior at elevated ambient temperature, and compatibility with 3.3V/5V logic-level drive signals.
Technical Context
This device integrates a PNP bipolar junction transistor with two discrete on-die biasing resistors (R1 between base and input, R2 between base and emitter), eliminating external component count for digital switching applications. Its fixed R1/R2 ratio enables predictable turn-on/off thresholds without external tuning.
The SOT23 package supports automated placement and provides 200mW power dissipation capability at +25°C ambient, with thermal resistance θJA = 625°C/W on FR4 PCB. Operation is specified across -55°C to +150°C, supporting industrial and automotive-grade environments when qualified per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | PNP pre-biased transistor with monolithic R1/R2 bias network |
| VCEO | -50V - maximum allowable collector-emitter voltage before breakdown |
| IC(max) | -100mA - absolute maximum continuous collector current for safe operation |
| R1 / R2 | 2.2kΩ / 10kΩ - defines input threshold and base current limiting for logic-level drive |
| VIN(ON) | -3.0V @ IOUT = -20mA - guaranteed turn-on voltage enabling direct 3.3V/5V MCU interface |
| PD | 200mW - maximum power dissipation on standard FR4 board, requiring thermal derating above +25°C |
| fT | 250MHz - usable bandwidth for high-speed digital switching up to ~10–20MHz edge rates |
Pinout & Package
Package: SOT23 - surface-mount plastic package with 3 terminals, 0.008g mass, UL 94V-0 rated molding compound, and matte tin-plated leads compliant with MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of internal PNP transistor | Connected to system ground or low-side return path; carries full load current |
| 2 (Base) | Internal base node connected to R1 and R2 | Not externally accessible; bias network internally sets base current and turn-off leakage |
| 3 (Collector) | Collector terminal of internal PNP transistor | Connected to load supply rail (e.g., +5V/VCC); sinks current when active |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | R1 = 2.2kΩ, R2 = 10kΩ - eliminates need for two external resistors in digital switch designs |
| Lead-free & green construction | RoHS 3 compliant, halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets automotive and industrial environmental mandates |
| SOT23 footprint compatibility | Standard JEDEC MO-203AA outline - enables drop-in replacement and automated assembly without retooling |
| Guaranteed VIN(OFF) | -0.3V max - ensures reliable cutoff with 0V logic high, minimizing standby leakage in battery-powered systems |
| AEC-Q101 qualification support | Manufactured in IATF 16949 certified facilities - enables use in automotive body electronics where PPAP documentation is required |
Applications
| LED Driver Switching | Microcontroller I/O Interface |
|---|---|
|
Use Scenario: Driving 20mA indicator LEDs from 3.3V GPIO pins in portable instrumentation. IC Role / Device Role / Timing Role: Low-side PNP switch that inverts logic and sinks LED current to ground. Use Value: Eliminates need for external base resistors while ensuring ≤0.3V saturation voltage at 20mA, maximizing LED forward voltage margin. |
Use Scenario: Level-shifting and current amplification for 5V peripheral enable signals controlled by 3.3V microcontrollers. IC Role / Device Role / Timing Role: Digital buffer with built-in pull-down biasing, providing clean high-Z input and robust sink capability. Use Value: Guaranteed -3.0V VIN(ON) ensures full turn-on with 3.3V logic high, reducing design iteration time versus discrete BJT + resistor solutions. |
| Power Rail Enable Control | Logic-Level Translation |
|
Use Scenario: Enabling/disabling 5V power rails for sensors or communication ICs in industrial PLC modules. IC Role / Device Role / Timing Role: High-side switch controller (used with external P-channel MOSFET) or direct low-side rail shunt. Use Value: -100mA IC rating supports driving gate capacitance of small PMOS devices or directly switching moderate loads like optocouplers. |
Use Scenario: Converting open-drain I²C bus signals between 1.8V and 3.3V domains in mixed-voltage SoC subsystems. IC Role / Device Role / Timing Role: Bidirectional level translator using active pull-up configuration with controlled rise/fall times. Use Value: 250MHz fT supports >1MHz I²C Fast Mode operation; integrated R1/R2 prevents floating states during bus idle periods. |
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 |
|---|---|---|---|
| DDTA113ZCA-7-F | R1 = 1kΩ, R2 = 10kΩ → lower input impedance, higher base current draw (~7.2mA @ -5V) | Better suited for 5V logic with stronger drive capability but higher quiescent input current | Select when interfacing with legacy 5V TTL outputs needing lower VIN(ON) threshold and higher noise immunity |
| DDTA143XCA-7-F | R1 = 4.7kΩ, R2 = 10kΩ → higher input impedance, lower base current (~1.8mA @ -5V), VIN(ON) = -2.5V | Optimized for ultra-low-power 3.3V systems where input current must be minimized | Select for battery-powered IoT nodes where standby current budget is <1μA and logic swing is ≥3.0V |
Compared with DDTA113ZCA-7-F and DDTA143XCA-7-F, DDTA123YCA-7 offers balanced input sensitivity and power efficiency-ideal for general-purpose 3.3V MCU interfaces where -3.0V VIN(ON) and -3.8mA IIN provide optimal noise margin and current consumption trade-off.
Availability
DDTA123YCA-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O buffering, and power rail enable control requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for DDTA123YCA-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 components for industrial, automotive, and consumer applications.
This part belongs to the DDTA (R1≠R2 Series) CA family of pre-biased transistors, designed specifically to reduce bill-of-materials count and improve layout density in digital switching applications across automotive body electronics and industrial control systems.
FAQ
What is the maximum operating temperature for DDTA123YCA-7?
The DDTA123YCA-7 is rated for operation from -55°C to +150°C junction temperature. Its thermal resistance θJA is 625°C/W on standard FR4 PCB, meaning ambient temperature must be limited to +85°C when dissipating 100mW continuously. Derating curves in DS30334 Rev. 8-2 confirm safe operation up to +125°C ambient at reduced power levels.
Can DDTA123YCA-7 replace a discrete PNP transistor plus two resistors?
Yes-DDTA123YCA-7 replaces a standard PNP BJT (e.g., MMBT3906) plus 2.2kΩ and 10kΩ bias resistors. Its internal R1/R2 network matches the exact values specified in the datasheet, and its electrical characteristics-including VIN(ON), VOUT(ON), and hFE-are tested and guaranteed across temperature, eliminating variability from discrete resistor tolerances and layout parasitics.
Is DDTA123YCA-7 qualified for automotive applications?
DDTA123YCA-7 is manufactured in IATF 16949 certified facilities and supports AEC-Q101 qualification upon request. While the base part is not pre-qualified, Diodes Incorporated provides PPAP documentation, change control, and automotive-grade traceability for customers requiring automotive body electronics compliance-subject to specific qualification testing and agreement.
What does the marking code 'P05' indicate on the device top side?
The marking 'P05' identifies the DDTA123YCA-7 in Diodes' SOT23 product family. It corresponds to the orderable part number DDTA123YCA-7-F and is used for visual identification during assembly and inspection. The 'P' prefix denotes pre-biased transistor series, and '05' uniquely maps to the R1=2.2kΩ/R2=10kΩ configuration within the DDTA CA family.
DDTA123YCA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 33 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTA123YCA-7 FAQ
1.How can I place an order for DDTA123YCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA123YCA-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 DDTA123YCA-7 reliable?
The price and inventory of DDTA123YCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA123YCA-7 is usually 5 days.
3.What payment methods are accepted for DDTA123YCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA123YCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA123YCA-7?
DDTA123YCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA123YCA-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 DDTA123YCA-7?
For technical support, including DDTA123YCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA123YCA-7 requirements.
6.How does Aetrix verify that DDTA123YCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA123YCA-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 DDTA123YCA-7 meets industry standards.
7.What is the process for return or replacement of DDTA123YCA-7?
All DDTA123YCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA123YCA-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 DDTA123YCA-7 part is unused and in its original packaging.
Return procedure for DDTA123YCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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