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Diodes Incorporated DDTA124TCA-7-F
- Part No.:
- DDTA124TCA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-23-3 Flat Leads
- Datasheet:
-
DDTA124TCA-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SOT23F
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
DDTA124TCA-7-F from Diodes Incorporated is a PNP pre-biased transistor with single built-in bias resistor (R1 = 22 kΩ), housed in SOT23 package, rated for VCEO = −50 V, IC(max) = −100 mA, and VCE(sat) ≤ −0.3 V at IC/IB = −2.5 mA/−0.25 mA. It serves as an integrated switch or level translator in low-power digital interface circuits.
For engineers reviewing the DDTA124TCA-7-F datasheet, DDTA124TCA-7-F pinout, DDTA124TCA-7-F application, or DDTA124TCA-7-F equivalent, key selection criteria include verified R1 tolerance (±30%), hFE range (100–600), thermal resistance (625 °C/W), automotive-grade qualification readiness, and SOT23 footprint compatibility.
Technical Context
This device integrates a PNP bipolar junction transistor with a single external-base biasing resistor (R1 only), eliminating need for discrete base resistors in simple switching configurations. Its epitaxial planar die construction ensures stable gain and low leakage across −55 °C to +150 °C operating range.
The transistor operates in saturation mode under standard drive conditions (IC/IB = −2.5 mA/−0.25 mA), delivering guaranteed VCE(sat) ≤ −0.3 V while maintaining hFE ≥ 100 at IC = −1 mA and VCE = −5 V - critical for reliable logic-level interfacing and load control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V: Maximum allowable collector-emitter voltage before breakdown; enables use in 3.3 V, 5 V, and 12 V rail-switching applications. |
| IC(max) | −100 mA: Continuous collector current rating; supports driving LEDs, small relays, or logic inputs without external heat sinking. |
| R1 | 22 kΩ ±30%: Integrated base bias resistor value; sets turn-on threshold and reduces BOM count in high-volume digital switching designs. |
| VCE(sat) | ≤ −0.3 V at IC/IB = −2.5 mA/−0.25 mA: Low saturation voltage minimizes power loss and self-heating during active switching. |
| hFE | 100–600 at IC = −1 mA, VCE = −5 V: Wide DC current gain range ensures robust switching margin across process and temperature variation. |
| PD | 200 mW on FR4 board: Power dissipation limit defines maximum continuous switching duty cycle without derating at room ambient. |
| RθJA | 625 °C/W: Thermal resistance from junction to ambient; informs PCB layout requirements (e.g., minimum copper area) for thermal management. |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, UL 94V-0 rated molding compound, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of PNP transistor | Connected to higher potential rail (e.g., VCC) in common-emitter switch configuration; current flows out from this pin. |
| 2 (Base) | Base terminal with internal R1 connection to emitter | Single external connection point; R1 (22 kΩ) ties internally between base and emitter - no external pull-up/down needed. |
| 3 (Collector) | Collector terminal of PNP transistor | Connected to load (e.g., LED cathode or MCU input); sinks current when transistor is saturated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias network | Reduces component count by eliminating external base resistor; simplifies PCB layout and improves assembly yield in high-density designs. |
| Epitaxial planar die construction | Ensures tight parameter distribution and stable hFE over temperature, supporting consistent switching behavior in industrial environments. |
| AEC-Q101 readiness | Manufactured in IATF 16949 certified facilities with PPAP capability; supports automotive subsystem qualification with minimal additional testing overhead. |
| Halogen- and antimony-free "Green" compound | Meets <900 ppm Br, <900 ppm Cl (<1500 ppm total Br+Cl), <1000 ppm Sb; satisfies strict environmental compliance for global OEM programs. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving indicator LEDs from 3.3 V or 5 V microcontroller outputs with current limiting via collector resistor. IC Role / Device Role / Timing Role: PNP switch controlling LED anode connection to supply rail; provides inverted logic-level control with low VCE(sat). Use Value: Eliminates need for discrete base resistor and pull-up, reducing BOM cost and board space while ensuring reliable saturation at IC ≤ 20 mA. |
Use Scenario: Level-shifting or inverting signals between mixed-voltage domains (e.g., 1.8 V FPGA I/O to 5 V peripheral enable line). IC Role / Device Role / Timing Role: Active-low level translator using emitter-follower or common-emitter topology; supports ≤ 10 MHz toggle rates. Use Value: Delivers predictable VCE(sat) ≤ −0.3 V and hFE ≥ 100 across −40 °C to +85 °C, enabling deterministic timing in signal conditioning paths. |
| Low-Power Sensor Enable Switch | Power Rail Sequencing Control |
Use Scenario: Enabling/disabling analog sensor modules (e.g., temperature or pressure sensors) during sleep cycles to minimize quiescent current. IC Role / Device Role / Timing Role: High-side switch disconnecting VCC to sensor; controlled by MCU GPIO in open-drain or active-low mode. Use Value: Achieves ICBO ≤ −0.5 μA at VCB = −50 V, ensuring sub-μA leakage in off-state and extending battery life in portable systems. |
Use Scenario: Controlling power-up sequence of multiple ICs (e.g., ADC followed by FPGA) using timed GPIO asserts. IC Role / Device Role / Timing Role: Delayed-enable switch triggered by MCU-controlled base signal; leverages fixed R1 to set predictable turn-on delay. Use Value: Stable R1 tolerance (±30%) and low VCE(sat) ensure repeatable timing margins and prevent rail collapse during sequencing transitions. |
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 |
|---|---|---|---|
| DDTA124TKA-7-F | Same R1 = 22 kΩ, but marked "KA" indicating tighter hFE bin (250–600 vs. 100–600); otherwise identical electrical specs and SOT23 package. | Preferred where higher minimum gain is required for marginal drive conditions or wider temperature operation. | Select KA variant if design requires guaranteed hFE ≥ 250 at IC = −1 mA; otherwise TCA suffices for general-purpose switching. |
| NSVDDTA124T1X | Automotive-grade version (AEC-Q101 qualified), same R1 = 22 kΩ, identical SOT23-3L package, but with enhanced test screening and traceability. | Required for production automotive ECUs; not necessary for industrial or consumer applications lacking AEC compliance mandates. | Choose NSVDDTA124T1X only when full AEC-Q101 certification and PPAP documentation are contractually required. |
Compared with DDTA124TCA-7-F, the KA variant offers higher guaranteed hFE for improved noise immunity in weak-drive scenarios, while the NSV variant adds automotive qualification overhead - neither is pin-compatible drop-in replacements unless their specific gain or compliance requirements align with system validation goals.
Availability
DDTA124TCA-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, low-power sensor enable switches, and power rail sequencing control requiring stable component supply and SOT23 footprint consistency.
Supply support for DDTA124TCA-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 industrial, computing, and automotive markets with ISO/TS 16949 and IATF 16949 certified operations.
This part belongs to the DDTA R1-only pre-biased transistor series, designed specifically to reduce bill-of-materials complexity and improve manufacturing yield in high-volume digital switching applications.
FAQ
What is the function of the internal resistor R1 in DDTA124TCA-7-F?
R1 is a 22 kΩ resistor connected internally between the base and emitter terminals. It provides fixed base biasing, allowing the transistor to operate as a saturated switch with only one external control signal applied to the base. This eliminates the need for an external pull-up or pull-down resistor in typical digital interface applications.
Can DDTA124TCA-7-F replace a standard PNP transistor like BC807 in existing designs?
Yes, but only if the circuit relies on external base biasing and can accommodate the integrated R1. Unlike BC807, DDTA124TCA-7-F has no base terminal free of internal resistance - it must be driven as a two-terminal (base-emitter) controlled switch. Layout changes may be needed to remove the discrete base resistor.
Is DDTA124TCA-7-F qualified for automotive applications?
DDTA124TCA-7-F is manufactured in IATF 16949 certified facilities and supports PPAP documentation, but it is not formally AEC-Q101 qualified. For automotive production, Diodes recommends NSVDDTA124T1X - the AEC-Q101 qualified variant with identical electrical characteristics and marking.
What is the maximum operating temperature for continuous use?
The device is rated for junction and storage temperatures from −55 °C to +150 °C. For continuous operation at ambient temperatures above +85 °C, derating per Figure 1 is required: power dissipation must be reduced linearly from 200 mW at +25 °C to zero at +150 °C, based on RθJA = 625 °C/W and PCB thermal design.
DDTA124TCA-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-3 Flat Leads
- 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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23F
DDTA124TCA-7-F FAQ
1.How can I place an order for DDTA124TCA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA124TCA-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 DDTA124TCA-7-F reliable?
The price and inventory of DDTA124TCA-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 DDTA124TCA-7-F is usually 5 days.
3.What payment methods are accepted for DDTA124TCA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA124TCA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA124TCA-7-F?
DDTA124TCA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA124TCA-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 DDTA124TCA-7-F?
For technical support, including DDTA124TCA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA124TCA-7-F requirements.
6.How does Aetrix verify that DDTA124TCA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTA124TCA-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 DDTA124TCA-7-F meets industry standards.
7.What is the process for return or replacement of DDTA124TCA-7-F?
All DDTA124TCA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA124TCA-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 DDTA124TCA-7-F part is unused and in its original packaging.
Return procedure for DDTA124TCA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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