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Diodes Incorporated ADTC144ECAQ-7
- Part No.:
- ADTC144ECAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADTC144ECAQ-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
ADTC144ECAQ from Diodes Incorporated is an AEC-Q101 qualified NPN pre-biased transistor in SOT23 package, featuring integrated 47 kΩ base bias resistors (R1 = R2), 100 mA max collector current, 50 V VCC, and 250 MHz fT. It functions as a digital switch in automotive signal conditioning circuits where space-constrained PCB layout and robust ESD immunity are required.
For engineers reviewing the ADTC144ECAQ datasheet, ADTC144ECAQ pinout, ADTC144ECAQ application, or ADTC144ECAQ equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, automotive-grade reliability context, and functionally matched alternatives for IATF 16949-compliant designs.
Technical Context
This device integrates matched 47 kΩ base-emitter and base-collector resistors to enable direct TTL/CMOS logic-level drive without external biasing components. Its 80 minimum DC current gain (GI) ensures reliable saturation at 10 mA output current with ≤0.3 V VO(on).
The 250 MHz gain-bandwidth product supports high-speed switching up to ~10 MHz in digital applications, while its -55°C to +150°C operating range and J-STD-020 Level 1 moisture sensitivity rating confirm suitability for under-hood automotive environments and reflow-compatible assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - Supports 48 V system rails and transient overvoltage tolerance in automotive power domains. |
| IC Max | 100 mA - Enables direct driving of small solenoids, LEDs, or logic inputs without external amplification. |
| R1 / R2 | 47 kΩ ±30% - Integrated matched bias network eliminates two external resistors and reduces BOM count. |
| VO(on) | ≤0.3 V @ IO/IL = 10 mA/0.5 mA - Ensures low conduction loss and clean logic-low output for downstream CMOS inputs. |
| fT | 250 MHz - Validates fast edge response for PWM dimming control and serial data buffering up to 10 Mbps. |
| GI Min | 80 @ VO = 5 V, IO = 5 mA - Guarantees stable saturation under worst-case temperature and process variation. |
| PD | 310 mW @ TA = 25°C on FR-4 - Defines thermal derating envelope for continuous operation on standard PCBs. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 0.915 mm typical lead pitch, 2.40 mm body length, and UL 94V-0 flammability rating; suitable for automated pick-and-place and IR reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter connection | Common reference node for bias resistor network and output current return path. |
| 2 (Base) | Input node | Internal junction of R1 and R2; accepts logic-level input voltage (0.5–3 V threshold). |
| 3 (Collector) | Output node | Switched high-side load connection; rated for 50 V and 100 mA continuous current. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing traceability. |
| Matched internal bias resistors | R1 = R2 = 47 kΩ ±30%, eliminating external component selection and layout error risk. |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) compliant with RoHS 3. |
| Low VO(on) | 0.1–0.3 V at 10 mA ensures minimal power dissipation and compatible logic-level interfacing. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs in instrument cluster backlighting modules. IC Role / Device Role / Timing Role: Digital switch controlled by MCU GPIO to enable/disable LED current path. Use Value: Eliminates need for discrete base resistor and reduces footprint by 2.5 mm² per channel. | Use Scenario: Extending low-drive-strength MCU outputs to interface with 5 V logic peripherals. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between 3.3 V microcontroller and 5 V sensor interface. Use Value: Provides 100 mA sink capability with guaranteed 0.3 V low-state voltage for noise-immune signaling. |
| Automotive Door Module | Body Control Unit Input Conditioning |
Use Scenario: Switching window motor control signals in door module PCBs exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: Robust digital isolator for PWM-controlled H-bridge gate drivers. Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient and 150°C junction temperature. | Use Scenario: Debouncing and filtering mechanical switch inputs (e.g., seat position sensors) before MCU sampling. IC Role / Device Role / Timing Role: Schmitt-trigger-like input stage with hysteresis defined by R1/R2 ratio. Use Value: 0.5 V turn-off and 3 V turn-on thresholds provide >2.5 V noise margin against EMI in vehicle harness environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSV144EKT3G | Same SOT23-3 package, identical R1=R2=47 kΩ, but rated only to 105°C TJ (not AEC-Q101). | Not approved for automotive safety-critical modules requiring PPAP documentation. | Select when cost-sensitive industrial control replaces automotive qualification requirements. |
| DTC144EKA-7-F | Identical electrical specs and AEC-Q101 rating, but uses different marking code (2B0 vs. 144E) and has ±20% R2/R1 ratio tolerance (vs. ±30% here). | Higher resistor matching precision enables tighter gain consistency in multi-channel arrays. | Prefer for systems requiring matched channel-to-channel gain deviation below ±15%. |
Compared with NSV144EKT3G and DTC144EKA-7-F, ADTC144ECAQ provides the broadest automotive compliance scope (full PPAP support), widest operating temperature range (-55°C to +150°C), and lowest-cost qualification path for new AEC-Q101 designs requiring proven supply chain traceability.
Availability
ADTC144ECAQ is available at Aetrix Electronics and suitable for automotive body control units, LED lighting modules, and microcontroller interface expansion requiring stable component supply, long-term lifecycle assurance, and IATF 16949-aligned sourcing.
Supply support for ADTC144ECAQ 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 ADTC144ECAQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor product line, engineered specifically for simplified digital switching in harsh-environment electronic control units with zero external bias component overhead.
FAQ
What is the maximum allowable junction temperature for ADTC144ECAQ during continuous operation?
The absolute maximum junction temperature is +150°C, and the device is rated for continuous operation across -55°C to +150°C ambient when mounted on FR-4 with minimum recommended pad layout. Derating begins above +25°C at 0.77 mW/°C based on RθJA = 403°C/W.
Can ADTC144ECAQ replace a standard NPN transistor like BC847 in existing designs?
Yes, but only if the circuit uses external base biasing. ADTC144ECAQ integrates 47 kΩ resistors and requires no external bias components - direct substitution without removing RB will cause incorrect biasing and potential saturation failure.
Is the 47 kΩ resistor tolerance symmetric, and how does it affect switching thresholds?
R1 and R2 each have ±30% tolerance, and their ratio is specified at ±20%. This results in VIN(on) varying between 1.5 V and 3.3 V and VIN(off) between 0.35 V and 0.65 V across lot and temperature extremes, defining usable logic-high/low margins.
Does ADTC144ECAQ support pulsed operation beyond its 100 mA DC rating?
Yes - the transient thermal impedance curve shows single-pulse power handling up to 0.35 W for 10 ms pulses, enabling short-duration peak loads such as inrush current limiting or solenoid actuation bursts, provided average power remains within 310 mW limits.
ADTC144ECAQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 47 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 310 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADTC144ECAQ-7 FAQ
1.How can I place an order for ADTC144ECAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADTC144ECAQ-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 ADTC144ECAQ-7 reliable?
The price and inventory of ADTC144ECAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADTC144ECAQ-7 is usually 5 days.
3.What payment methods are accepted for ADTC144ECAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADTC144ECAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADTC144ECAQ-7?
ADTC144ECAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADTC144ECAQ-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 ADTC144ECAQ-7?
For technical support, including ADTC144ECAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADTC144ECAQ-7 requirements.
6.How does Aetrix verify that ADTC144ECAQ-7 is sourced from the original manufacturer or authorized distributors?
All ADTC144ECAQ-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 ADTC144ECAQ-7 meets industry standards.
7.What is the process for return or replacement of ADTC144ECAQ-7?
All ADTC144ECAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ADTC144ECAQ-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 ADTC144ECAQ-7 part is unused and in its original packaging.
Return procedure for ADTC144ECAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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