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Diodes Incorporated DDTA124XE-7-F
- Part No.:
- DDTA124XE-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTA124XE-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
DDTA124XE-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT523 package with integrated bias resistors R1 = 22 kΩ and R2 = 47 kΩ, designed for digital switching and level translation in low-power logic interfaces. It supports −40 V input voltage range, delivers −50 mA output current, exhibits DC current gain (hFE) of 68 at −10 mA, and operates across −55°C to +150°C for automotive and industrial control applications.
For engineers reviewing the DDTA124XE-7-F datasheet, DDTA124XE-7-F pinout, DDTA124XE-7-F application, or DDTA124XE-7-F equivalent, key selection criteria include verified R1/R2 resistor values, guaranteed AEC-Q101 qualification, SOT523 thermal performance (RθJA = 833°C/W), and confirmed −50 mA IO(ON) capability under defined test conditions.
Technical Context
This device integrates two precision bias resistors (R1 ≠ R2) on a single PNP epitaxial planar die to eliminate external base resistors in digital interface circuits. Its asymmetric resistor network enables optimized turn-on/turn-off timing and stable saturation behavior at low drive currents.
The SOT523 package provides minimal footprint (1.6 × 1.6 mm) and thermal resistance suitable for high-density PCB layouts. Absolute maximum ratings include −50 V VCC, −40 V VIN, and 150 mW power dissipation on FR4 board with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 (Nominal) | 22 kΩ - sets base current for reliable turn-on with standard logic-high levels |
| R2 (Nominal) | 47 kΩ - provides active pull-down path to ensure fast, controlled turn-off |
| IO(ON) Max | −50 mA - supports driving moderate loads such as LED indicators or small relays |
| hFE @ −10 mA | 68 - ensures predictable current amplification without external gain-setting components |
| VIN(ON) Max | −1.4 V @ IO = −2 mA - compatible with 3.3 V and 5 V CMOS/TTL logic families |
| PD (FR4) | 150 mW - defines maximum continuous power handling with standard PCB thermal relief |
| TJ Range | −55°C to +150°C - validated for under-hood automotive and industrial ambient environments |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic case (1.60 × 1.60 × 0.75 mm), UL 94V-0 rated, moisture sensitivity Level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink output terminal | Connected to load return path; requires external supply reference for proper PNP operation |
| 2 (Base) | Control input node | Internally connected to R1 and R2 junction; accepts logic-level input to enable conduction |
| 3 (Collector) | Power input terminal | Connected to negative supply rail (e.g., −5 V or −12 V); supplies current to load via emitter |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates two external resistors while enabling precise switching thresholds and reduced board space |
| AEC-Q101 qualified | Validated for automotive electronics per stress testing including HTOL, TC, HAST, and ESD |
| Green compound construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) |
| SOT523 footprint compatibility | Enables drop-in replacement for other SOT523 transistors without layout redesign |
Applications
| Automotive Body Control Module | Industrial PLC Input Interface |
|---|---|
Use Scenario: Driving discrete indicator LEDs and solenoid drivers from microcontroller GPIO pins in vehicle door modules. IC Role / Device Role / Timing Role: Digital switch translating 3.3 V logic signals into −12 V sink paths for grounded-load activation. Use Value: Eliminates need for dual-resistor networks per channel, reducing BOM count and improving channel density on compact PCBs. | Use Scenario: Isolating and conditioning 24 V DC field sensor inputs before feeding to FPGA-based logic controllers. IC Role / Device Role / Timing Role: Level-shifting interface converting industrial voltage levels into safe, logic-compatible signals. Use Value: Provides consistent −1.4 V turn-on threshold and −50 mA sink capacity, ensuring noise-immune signal acquisition. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Logic Buffer |
Use Scenario: Controlling sequential power-up of auxiliary rails (e.g., −5 V analog section) using main controller outputs. IC Role / Device Role / Timing Role: Controlled-current sink enabling timed activation of downstream regulators via emitter-follower configuration. Use Value: Delivers stable −50 mA output with 68 hFE, allowing accurate timing without additional feedback or compensation. | Use Scenario: Interfacing isolated serial communication lines (RS-232/RS-485) with low-voltage microcontrollers in portable diagnostic tools. IC Role / Device Role / Timing Role: Signal inversion and voltage translation stage between legacy interface ICs and modern SoCs. Use Value: Maintains −0.3 V VO(ON) saturation at −2 mA, preserving signal integrity and minimizing propagation delay jitter. |
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 |
|---|---|---|---|
| DDTA124XV-7-F | R1 = 22 kΩ, R2 = 100 kΩ - higher R2 increases turn-off time and reduces standby current | Better suited for ultra-low-quiescent-current sleep-mode circuits where slower response is acceptable | Select when minimizing IO(OFF) < 0.5 µA is critical and −30 mA IO(ON) suffices |
| DDTA144WE-7-F | R1 = 47 kΩ, R2 = 22 kΩ - swapped resistor ratio raises VIN(ON) to −2.5 V and lowers hFE to 56 | Requires stronger negative drive signal; less sensitive to noise but lower gain margin | Prefer when interfacing with −5 V logic families needing higher input threshold immunity |
Compared with DDTA124XE-7-F, DDTA124XV-7-F offers deeper off-state isolation at the cost of slower switching, while DDTA144WE-7-F trades gain and sensitivity for improved noise rejection-making each optimal for distinct drive strength and power budget constraints.
Availability
DDTA124XE-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input interfaces, and consumer appliance power sequencing requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTA124XE-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The DDTA series targets space-constrained digital interface applications, delivering pre-biased PNP transistors with tightly controlled R1/R2 ratios and AEC-Q101 validation for robust switching in harsh environments.
FAQ
What is the exact resistor tolerance for R1 and R2 in DDTA124XE-7-F?
R1 tolerance is ±30%, and R2/R1 ratio tolerance is ±20%, as specified in the Electrical Characteristics table. These tolerances ensure predictable turn-on voltage (VIN(ON) = −1.4 V max) and stable gain (hFE = 68) across production lots without requiring post-manufacture calibration.
Can DDTA124XE-7-F be used in place of a discrete PNP transistor plus two external resistors?
Yes-it replaces a PNP transistor (e.g., BC807) and two bias resistors (22 kΩ and 47 kΩ) in a single SOT523 package. This reduces PCB area by >60%, eliminates solder joint variability, and guarantees matched resistor tracking over temperature and voltage.
Is the SOT523 package of DDTA124XE-7-F compatible with standard reflow profiles?
Yes-the device is qualified for lead-free reflow per J-STD-020, with moisture sensitivity Level 1. Its matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, supporting peak temperatures up to 260°C in standard Pb-free profiles.
Does DDTA124XE-7-F support bidirectional signal translation?
No-it is a unidirectional PNP switch optimized for sinking current from a negative supply to ground. It does not support reverse current flow or AC coupling; its internal diode structure and bias network are designed exclusively for DC digital switching applications.
DDTA124XE-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 68 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 150 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
DDTA124XE-7-F FAQ
1.How can I place an order for DDTA124XE-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA124XE-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 DDTA124XE-7-F reliable?
The price and inventory of DDTA124XE-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 DDTA124XE-7-F is usually 5 days.
3.What payment methods are accepted for DDTA124XE-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA124XE-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA124XE-7-F?
DDTA124XE-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA124XE-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 DDTA124XE-7-F?
For technical support, including DDTA124XE-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA124XE-7-F requirements.
6.How does Aetrix verify that DDTA124XE-7-F is sourced from the original manufacturer or authorized distributors?
All DDTA124XE-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 DDTA124XE-7-F meets industry standards.
7.What is the process for return or replacement of DDTA124XE-7-F?
All DDTA124XE-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA124XE-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 DDTA124XE-7-F part is unused and in its original packaging.
Return procedure for DDTA124XE-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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