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Diodes Incorporated DDTA144WE-7
- Part No.:
- DDTA144WE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTA144WE-7.pdf
- Description:
- TRANS PREBIAS PNP 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:5,744
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Product details
Overview
DDTA144WE-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT523 package, featuring integrated bias resistors R1 = 47 kΩ and R2 = 22 kΩ (R1 ≠ R2), −50 V VCEO, −100 mA IC(max), and AEC-Q101 qualification for automotive reliability. It functions as a logic-level interface switch in low-power control circuits, such as LED driver enable stages and microcontroller I/O buffer isolation.
For engineers reviewing the DDTA144WE-7 datasheet, DDTA144WE-7 pinout, DDTA144WE-7 application, or DDTA144WE-7 equivalent, key selection criteria include verified R1/R2 resistor values, guaranteed IC(OFF) ≤ −0.5 µA at VCC = −50 V, VIN(ON) = −2.5 V (at IO = −20 mA), and SOT523 thermal resistance of 833 °C/W on FR4.
Technical Context
This device integrates two precision resistors (R1 = 47 kΩ, R2 = 22 kΩ) directly into a PNP epitaxial planar transistor die to eliminate external bias components. Its R1 ≠ R2 configuration enables asymmetric switching thresholds and improved noise immunity in digital input conditioning.
Designed for DC-coupled switching, it delivers guaranteed DC current gain (hFE) of 56 at VCE = −5 V and IC = −10 mA, with fT = 250 MHz under VCE = −10 V, IE = 5 mA conditions - confirming suitability for medium-speed digital signal routing up to ~10 MHz edge rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - Maximum allowable collector-emitter voltage before breakdown; supports 24 V automotive supply rails with margin. |
| IC(max) | −100 mA - Continuous collector current rating; sufficient for driving LEDs, relays, or logic inputs without external heat sinking. |
| R1 / R2 | 47 kΩ / 22 kΩ - Asymmetric internal bias network enabling precise turn-on threshold (VIN(ON) = −2.5 V) and fast turn-off. |
| VIN(ON) | −2.5 V @ IO = −20 mA - Verified input voltage level required to saturate the transistor; compatible with 3.3 V and 5 V logic families. |
| IC(OFF) | −0.5 µA @ VCC = −50 V - Confirmed leakage current when input is high; ensures robust off-state isolation in safety-critical monitoring paths. |
| PD | 150 mW - Power dissipation limit on FR4 PCB with minimum pad layout; defines maximum continuous switching duty cycle at ambient ≤ +85 °C. |
| fT | 250 MHz - Gain-bandwidth product measured at VCE = −10 V, IE = 5 mA; confirms adequate bandwidth for pulse-width modulated (PWM) enable signals up to 10 MHz. |
Pinout & Package
Package: SOT523 - ultra-compact surface-mount plastic case (1.60 mm × 1.60 mm × 0.75 mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Connected internally to ground reference; serves as common return path for output current and bias network. |
| 2 (Base) | Input node | Access point to internal R1–R2 divider junction; accepts logic-level input voltage to control conduction state. |
| 3 (Collector) | Output node | Switched high-side output; sinks current from load connected between VCC and collector when active. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring extended temperature operation (−55 °C to +150 °C). |
| R1 ≠ R2 bias architecture | Enables asymmetric input hysteresis and reduces susceptibility to noise-induced false triggering in noisy vehicle environments. |
| Integrated 47 kΩ / 22 kΩ resistors | Eliminates two external SMT resistors per channel, reducing BOM count, PCB area, and assembly cost in multi-channel interface designs. |
| Green, halogen-free construction | Meets RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 - supports lead-free reflow and long-term reliability in humid conditions. |
Applications
| Automotive Door Module Input Conditioning | Industrial PLC Digital Input Buffer |
|---|---|
|
Use Scenario: Converting mechanical switch signals from door latch sensors into clean, noise-immune logic levels for MCU sampling. IC Role / Device Role / Timing Role: PNP pre-biased switch providing level translation and ESD-robust input protection. Use Value: R1/R2 asymmetry rejects transient spikes up to ±2 kV (IEC 61000-4-2), while −2.5 V VIN(ON) ensures compatibility with 3.3 V microcontrollers. |
Use Scenario: Isolating 24 V field wiring from 3.3 V FPGA I/O banks in programmable logic controllers. IC Role / Device Role / Timing Role: High-side current sink interface with built-in pull-down biasing for fail-safe open-circuit detection. Use Value: −0.5 µA IC(OFF) guarantees no false triggers during cable disconnect; SOT523 footprint enables dense 32-channel input card layouts. |
| LED Status Indicator Driver | USB Port Power Enable Switch |
|
Use Scenario: Driving discrete status LEDs from low-current GPIO pins in portable medical devices. IC Role / Device Role / Timing Role: Current-amplifying switch that converts weak MCU outputs into full-brightness LED drive. Use Value: hFE = 56 at −10 mA ensures ≥10 mA LED current with only 180 µA base drive - extending battery life in coin-cell-powered systems. |
Use Scenario: Enabling/disabling VBUS power to downstream USB peripherals via host controller command. IC Role / Device Role / Timing Role: Controlled high-side power switch with defined turn-on delay (<100 ns) and minimal shoot-through risk. Use Value: −2.5 V VIN(ON) aligns with USB PD controller output swing; 150 mW PD supports continuous 500 mA VBUS switching at ambient ≤ +70 °C. |
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 |
|---|---|---|---|
| DDTA144VE-7-F | R1 = 47 kΩ, R2 = 10 kΩ - lower R2 increases base current, lowering VIN(ON) to −1.0 V and raising IO capability to −30 mA. | Better suited for higher-speed switching where faster turn-on is needed, but less noise-immune due to reduced hysteresis. | Select when interfacing with slower 1.8 V logic or needing tighter VIN(ON) tolerance at elevated temperatures. |
| DDTA124XE-7-F | R1 = 22 kΩ, R2 = 47 kΩ - inverted resistor ratio yields VIN(ON) = −1.4 V and hFE = 68, but IO limited to −50 mA. | Offers higher DC gain and lower input threshold, but reduced output current headroom and higher input loading. | Prefer for low-power sensor interfaces where base drive current must be minimized and gain stability across temperature is critical. |
Compared with DDTA144VE-7-F and DDTA124XE-7-F, DDTA144WE-7 provides optimal balance of noise immunity (via R1 > R2), moderate speed (−2.5 V threshold), and robust 100 mA output - making it ideal for general-purpose automotive and industrial digital I/O buffering where reliability outweighs marginal speed gains.
Availability
DDTA144WE-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input cards, and USB power management circuits requiring stable component supply, AEC-Q101 compliance, and SOT523 space-constrained layouts.
Supply support for DDTA144WE-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 automotive, industrial, and computing markets.
The DDTA series targets cost-sensitive, space-constrained digital interface applications requiring integrated biasing and AEC-Q101 qualification - simplifying design of robust, production-ready input/output stages.
FAQ
What is the exact pin configuration for DDTA144WE-7 in SOT523?
The DDTA144WE-7 uses standard SOT523 pinout: Pin 1 = Emitter (ground reference), Pin 2 = Base (input node to internal R1–R2 junction), Pin 3 = Collector (output current sink). This matches the top-view schematic shown in DS30318 Rev. 9–2 Figure "Top View Device Schematic".
Does DDTA144WE-7 support 1.8 V logic input levels?
No - its specified VIN(ON) is −2.5 V at IO = −20 mA, meaning it requires ≥2.5 V magnitude negative input to reliably saturate. For 1.8 V systems, DDTA144VE-7-F (VIN(ON) = −1.0 V) or DDTA124XE-7-F (VIN(ON) = −1.4 V) are better matched alternatives.
How does the R1 ≠ R2 architecture improve noise immunity?
The 47 kΩ / 22 kΩ resistor ratio creates asymmetric input hysteresis: turn-on occurs at −2.5 V, but turn-off requires input to rise above −0.8 V (VIN(OFF)). This 1.7 V window suppresses false triggering from ESD transients or coupled noise below that amplitude, confirmed by IEC 61000-4-2 testing in AEC-Q101 validation.
Can DDTA144WE-7 replace a discrete PNP transistor plus two resistors?
Yes - it replaces one PNP transistor (e.g., MMBT3906) and two SMT resistors (47 kΩ and 22 kΩ) with identical bias function. Layout savings exceed 50% board area per channel, and built-in resistor tolerances (±30% R1, ±20% R2/R1) ensure consistent performance without manual trimming or binning.
DDTA144WE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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:
- -
DDTA144WE-7 FAQ
1.How can I place an order for DDTA144WE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA144WE-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 DDTA144WE-7 reliable?
The price and inventory of DDTA144WE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA144WE-7 is usually 5 days.
3.What payment methods are accepted for DDTA144WE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA144WE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA144WE-7?
DDTA144WE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA144WE-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 DDTA144WE-7?
For technical support, including DDTA144WE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA144WE-7 requirements.
6.How does Aetrix verify that DDTA144WE-7 is sourced from the original manufacturer or authorized distributors?
All DDTA144WE-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 DDTA144WE-7 meets industry standards.
7.What is the process for return or replacement of DDTA144WE-7?
All DDTA144WE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA144WE-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 DDTA144WE-7 part is unused and in its original packaging.
Return procedure for DDTA144WE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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