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Diodes Incorporated DDTA143XCA-7
- Part No.:
- DDTA143XCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-23-3 Flat Leads
- Datasheet:
-
DDTA143XCA-7.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT23F
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
DDTA143XCA-7 from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1 = 4.7kΩ and R2 = 10kΩ bias resistors. It delivers -100mA max output current, -2.5V input turn-on voltage at -20mA load, and DC current gain (hFE) of 30 at -10mA collector current. It serves as an on/off switch in low-power digital interface circuits such as microcontroller GPIO drivers.
For engineers reviewing the DDTA143XCA-7 datasheet, DDTA143XCA-7 pinout, DDTA143XCA-7 application, or DDTA143XCA-7 equivalent, key selection criteria include verified input threshold voltage (-2.5V), guaranteed off-state leakage (<0.5μA), resistor ratio tolerance (±20%), thermal resistance (625°C/W), and automotive-grade packaging compliance (J-STD-020 Level 1).
Technical Context
This device integrates a PNP bipolar junction transistor with two monolithically embedded silicon resistors-R1 (4.7kΩ) connected between base and input, R2 (10kΩ) between base and emitter-to eliminate external bias components. Its negative-input logic interface enables direct connection to 3.3V/5V MCU outputs without level-shifting.
The SOT23 package supports automated pick-and-place assembly and provides 200mW power dissipation capability under standard FR4 PCB mounting. Device operation is validated across -55°C to +150°C ambient temperature range, with guaranteed performance at VCC = -50V and IC(max) = -100mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -50V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in high-side switching. |
| IC(max) | -100mA - Absolute maximum continuous collector current; sets upper limit for load-driving capability. |
| VIN(on) | -2.5V @ IOUT = -20mA - Input voltage required to saturate transistor; ensures reliable turn-on from standard logic levels. |
| hFE | 30 @ VCE = -5V, IC = -10mA - DC current gain; determines base drive efficiency and switching speed in saturated mode. |
| R1/R2 | 4.7kΩ / 10kΩ ±20% - Precision-matched internal bias network; eliminates need for external resistors and reduces BOM count. |
| PD | 200mW - Maximum power dissipation at TAMB = +25°C; constrains thermal design margin on standard PCBs. |
| RθJA | 625°C/W - Junction-to-ambient thermal resistance; indicates temperature rise per watt under specified pad layout. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3 terminals, JEDEC TO-236AB compliant, moisture sensitivity level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of PNP transistor | Connected to higher potential (e.g., VCC); current flows out when device is active. |
| 2 (Base) | Base node with internal R1–R2 divider | Internally biased via 4.7kΩ (R1) and 10kΩ (R2); no external base resistor needed. |
| 3 (Collector) | Collector terminal of PNP transistor | Connected to load; sinks current to ground when transistor is on. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | R1 = 4.7kΩ, R2 = 10kΩ with ±20% ratio tolerance - reduces component count and layout area in digital switching nodes. |
| Automated assembly compatibility | SOT23 footprint with J-STD-020 Level 1 moisture rating - enables high-yield reflow soldering without baking. |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (UL 94V-0), <900ppm Br/Cl, <1000ppm Sb - meets global environmental compliance mandates. |
| Wide operating temperature | -55°C to +150°C - supports deployment in under-hood automotive, industrial control, and outdoor electronics. |
Applications
| LED Indicator Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving discrete LEDs from 3.3V or 5V microcontroller outputs where sink current exceeds GPIO limits. IC Role / Device Role / Timing Role: PNP switch enabling high-side LED connection with logic-level input control. Use Value: Eliminates need for external base resistors and supports fast on/off transitions with <0.5μA off-state leakage. |
Use Scenario: Extending limited GPIO count by adding programmable digital outputs using minimal board space. IC Role / Device Role / Timing Role: Digital buffer/switch translating MCU logic signals into higher-current drive capability. Use Value: Reduces BOM cost and layout complexity while maintaining deterministic turn-on (-2.5V) and saturation (-0.1V VCE(sat)). |
| Level-Shifter Interface | Power Rail Enable Switch |
|
Use Scenario: Interfacing 1.8V/3.3V logic domains to 5V/12V peripherals without dedicated level translators. IC Role / Device Role / Timing Role: Voltage-threshold-controlled switch enabling bidirectional signal translation in open-collector configurations. Use Value: Provides predictable input threshold (-2.5V) and rail-to-rail output swing compatible with TTL/CMOS inputs. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., sensor supplies, display backlights) under firmware control. IC Role / Device Role / Timing Role: High-side enable switch controlling VCC delivery to downstream subsystems. Use Value: Supports clean power sequencing with <0.5μA off-state current and -50V VCEO margin for transient protection. |
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 |
|---|---|---|---|
| DDTA143FCA-7-F | R2 = 22kΩ (vs. 10kΩ), higher input impedance, lower base current (-1.8mA vs. -1.8mA at same VIN) | Better suited for ultra-low-power wake-up circuits where input loading must be minimized | Select when reducing MCU port current consumption is critical and slower switching is acceptable |
| DDTA143ZCA-7-F | R2 = 47kΩ, higher hFE = 80, but reduced IC(max) = -100mA remains unchanged | Improved gain for marginal drive conditions, but tighter input voltage window (-1.3V VIN(on)) | Prefer when driving heavier loads with weak base drive, but verify input logic compatibility |
Compared with DDTA143FCA-7-F and DDTA143ZCA-7-F, the DDTA143XCA-7 offers balanced input sensitivity (-2.5V), moderate gain (hFE = 30), and optimal R1/R2 ratio for general-purpose 3.3V/5V digital switching-making it the default choice for robust, production-ready interface designs.
Availability
DDTA143XCA-7 is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO expansion, and power rail enable applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for DDTA143XCA-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, energy-efficient components for industrial, automotive, and consumer markets.
This part belongs to the DDTA (R1≠R2 SERIES) CA family of pre-biased transistors, designed specifically to simplify digital interface design by integrating precision bias resistors and supporting automated SMT assembly.
FAQ
What is the marking code for DDTA143XCA-7 on the SOT23 package?
The top-side marking for DDTA143XCA-7 is "P09", followed by a two-character date code (e.g., "MD" for December 2025). This marking is laser-etched on the device surface and matches the ordering information table in DS30334 Rev. 8-2. The "P09" identifier is unique to this resistor ratio configuration and distinguishes it from other DDTA variants like P10 (DDTA143FCA-7-F) or P11 (DDTA143ZCA-7-F).
Can DDTA143XCA-7 replace a discrete PNP transistor plus two external resistors?
Yes-DDTA143XCA-7 directly replaces a PNP BJT (e.g., MMBT3906) plus 4.7kΩ and 10kΩ external bias resistors. Its internal R1/R2 network is trimmed during wafer fabrication to maintain ±20% ratio tolerance, ensuring consistent turn-on behavior across batches. Layout savings exceed 2.5mm² per instance, and thermal coupling between resistor and transistor improves stability versus discrete solutions.
Is DDTA143XCA-7 qualified for automotive applications?
DDTA143XCA-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not pre-qualified to AEC-Q101 unless explicitly ordered with automotive suffixes (e.g., -7-G). For automotive use, Diodes recommends contacting their local representative to initiate qualification testing or select the AEC-Q101-qualified variant DDTA143XCAQ-7-F, which shares identical electrical specs and SOT23 packaging.
What is the maximum safe operating frequency for DDTA143XCA-7 in switching applications?
The device has a gain-bandwidth product (fT) of 250MHz at VCE = -10V and IE = -5mA, but practical switching frequency is limited by stored charge and package parasitics. In typical digital on/off operation with 10kΩ load, rise/fall times are ~150ns, supporting reliable operation up to 2MHz. For >5MHz applications, consider dedicated high-speed switches or MOSFET alternatives due to BJT minority-carrier limitations.
DDTA143XCA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-3 Flat Leads
- 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):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 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-23F
DDTA143XCA-7 FAQ
1.How can I place an order for DDTA143XCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA143XCA-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 DDTA143XCA-7 reliable?
The price and inventory of DDTA143XCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA143XCA-7 is usually 5 days.
3.What payment methods are accepted for DDTA143XCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA143XCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA143XCA-7?
DDTA143XCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA143XCA-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 DDTA143XCA-7?
For technical support, including DDTA143XCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA143XCA-7 requirements.
6.How does Aetrix verify that DDTA143XCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA143XCA-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 DDTA143XCA-7 meets industry standards.
7.What is the process for return or replacement of DDTA143XCA-7?
All DDTA143XCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA143XCA-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 DDTA143XCA-7 part is unused and in its original packaging.
Return procedure for DDTA143XCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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