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Diodes Incorporated DDTA124XCA-7
- Part No.:
- DDTA124XCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTA124XCA-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,522
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Product details
Overview
DDTA124XCA-7 from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1=22kΩ and R2=47kΩ bias resistors, −50mA output current rating, −2.5V input turn-on voltage at −2mA load, and 68× DC current gain (hFE). It functions as a single-stage digital switch in low-power logic interface and level-shifting circuits.
For engineers reviewing the DDTA124XCA-7 datasheet, DDTA124XCA-7 pinout, DDTA124XCA-7 application, or DDTA124XCA-7 equivalent, key selection criteria include verified input threshold voltage (−2.5V), guaranteed off-state leakage (<−0.5μA), resistor tolerance (±30% R1, ±20% R2 ratio), thermal resistance (625°C/W), and AEC-Q101 readiness for automotive signal conditioning.
Technical Context
This device integrates a PNP bipolar junction transistor with two discrete on-die biasing resistors (R1=22kΩ, R2=47kΩ) configured in standard emitter-follower feedback topology. Its input is applied to the base via R1, while R2 connects base to emitter - enabling direct TTL/CMOS-compatible switching without external bias components.
It operates within −55°C to +150°C ambient range, delivers −50mA maximum output current, and maintains −0.1V typical saturation voltage at −2mA drive. The 250MHz fT supports moderate-speed digital transitions up to ~10MHz edge rates in buffered I/O applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | −50V max; defines absolute maximum reverse VCE rating for safe operation in negative-rail systems |
| Input Turn-On Voltage | −2.5V at −2mA load; ensures reliable activation from standard 3.3V/5V logic with inverted polarity |
| DC Current Gain | 68× min; guarantees sufficient drive margin for interfacing with high-impedance loads or cascaded stages |
| Output Saturation Voltage | −0.1V typ at −2mA; minimizes power loss and enables clean low-side switching in rail-to-rail signal paths |
| Thermal Resistance | 625°C/W; requires minimal PCB copper area for thermal management in space-constrained SOT23 layouts |
| Resistor Tolerance | R1 ±30%, R2/R1 ±20%; ensures predictable switching thresholds across manufacturing lots and temperature |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated, 0.008g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected internally to R2; serves as common reference node for bias network and output path |
| 2 (Base) | Bias input node | Internal junction of R1 and R2; accepts logic-level input to control transistor conduction |
| 3 (Collector) | Switched output terminal | Provides inverted, current-sinking output referenced to negative supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | Eliminates need for two external resistors, reducing BOM count and layout area in digital I/O buffers |
| Green molding compound | Halogen- and antimony-free formulation (<900ppm Br+Cl, <1000ppm Sb) meets global environmental compliance mandates |
| Automated assembly compatibility | SOT23 footprint and lead finish conform to IPC-7351B standards for high-yield pick-and-place and reflow |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities; supports PPAP documentation for automotive signal interface modules |
Applications
| Industrial PLC Input Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Isolating and conditioning 24V DC field sensor signals before microcontroller ADC input. IC Role / Device Role / Timing Role: Level-shifting and current-limiting digital interface stage converting industrial voltage levels to 3.3V logic-compatible signals. Use Value: −2.5V input threshold ensures noise-immune activation under EMI-prone factory environments; 625°C/W θJA allows operation without heatsink in compact DIN-rail enclosures. | Use Scenario: Driving LED status indicators and small solenoids from CAN/LIN subsystem MCUs. IC Role / Device Role / Timing Role: Low-side switch providing controlled current sink for indicator loads with built-in current limiting. Use Value: Integrated R1/R2 eliminates external resistor placement errors; −50mA rating safely drives dual LEDs or small relays without derating. |
| Consumer Appliance Control Board | Medical Diagnostic Equipment Interface |
Use Scenario: Enabling/disabling auxiliary power rails and sensor biasing in smart home appliances. IC Role / Device Role / Timing Role: Logic-controlled enable switch for sub-circuits requiring precise on/off sequencing. Use Value: −0.1V VCE(sat) minimizes standby power loss; RoHS3/Green compliance satisfies global regulatory requirements for white goods. | Use Scenario: Isolating patient-connected analog front-end signals from digital processing units. IC Role / Device Role / Timing Role: Safe, low-leakage signal gate preventing backfeed into sensitive measurement paths. Use Value: <−0.5μA off-state leakage ensures signal integrity during idle periods; −55°C to +150°C rating supports sterilization and extended operational life. |
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 |
|---|---|---|---|
| DDTA124ECA-7-F | R1=22kΩ, R2=22kΩ (1:1 ratio); higher input current (−0.5mA vs −0.36mA) | Better suited for faster switching where lower input impedance is acceptable | Select when driving from low-impedance sources or requiring tighter VIN(on) consistency |
| NSV124XDXV6T1G | Same R1/R2 values but rated for −100mA output; higher PD (310mW vs 200mW) | Supports heavier loads like relay coils or multi-LED strings without thermal derating | Choose when output current exceeds −50mA or board-level thermal budget is constrained |
Compared with DDTA124XCA-7, DDTA124ECA-7-F offers improved speed at the cost of higher input loading, while NSV124XDXV6T1G extends current capability and thermal headroom - making the original optimal for precision low-power logic interfacing where leakage and threshold stability are critical.
Availability
DDTA124XCA-7 is available at Aetrix Electronics and suitable for industrial PLC input modules, automotive body control units, consumer appliance control boards, and medical diagnostic equipment interfaces requiring stable component supply and long-term lifecycle support.
Supply support for DDTA124XCA-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DDTA series targets cost-sensitive, high-volume digital interface applications requiring simplified BOMs and robust performance across automotive, industrial, and consumer markets - emphasizing reliability, environmental compliance, and ease of integration.
FAQ
What is the maximum continuous collector current for DDTA124XCA-7?
The absolute maximum continuous output current is −50mA, verified per DS30334 Rev. 8–2 Section "Absolute Maximum Ratings". This rating applies at TA = +25°C with FR4 PCB mounting using minimum recommended pad layout. Derating is required above +25°C ambient per the 625°C/W thermal resistance specification.
Does DDTA124XCA-7 require external bias resistors?
No. DDTA124XCA-7 integrates R1 = 22kΩ and R2 = 47kΩ on-die bias resistors in standard pre-biased configuration. These eliminate the need for external base-emitter or base-collector resistors in typical digital switching applications, reducing component count and layout complexity.
Is DDTA124XCA-7 qualified for automotive use?
DDTA124XCA-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 in standard form, Diodes Incorporated confirms it meets all stress test requirements for AEC-Q101 when submitted through formal qualification programs - making it suitable for automotive signal interface applications with customer-led qualification.
What is the marking code for DDTA124XCA-7 on the SOT23 package?
The top-side marking is "P18", as specified in the Ordering Information table of DS30334 Rev. 8–2. This 2-character code uniquely identifies the DDTA124XCA-7 variant within the DDTA (R1≠R2 SERIES) CA family and is laser-etched on the device body for traceability.
DDTA124XCA-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:
- -
DDTA124XCA-7 FAQ
1.How can I place an order for DDTA124XCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA124XCA-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 DDTA124XCA-7 reliable?
The price and inventory of DDTA124XCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA124XCA-7 is usually 5 days.
3.What payment methods are accepted for DDTA124XCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA124XCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA124XCA-7?
DDTA124XCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA124XCA-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 DDTA124XCA-7?
For technical support, including DDTA124XCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA124XCA-7 requirements.
6.How does Aetrix verify that DDTA124XCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA124XCA-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 DDTA124XCA-7 meets industry standards.
7.What is the process for return or replacement of DDTA124XCA-7?
All DDTA124XCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA124XCA-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 DDTA124XCA-7 part is unused and in its original packaging.
Return procedure for DDTA124XCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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