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NXP Semiconductors PDTA144VK,115
- Part No.:
- PDTA144VK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTA144VK,115.pdf
- Description:
- TRANS PREBIAS PNP 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:7,690
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Product details
Overview
PDTA144VK from Nexperia is a PNP resistor-equipped transistor (RET) designed for general-purpose switching and amplification in compact surface-mount applications. It features integrated bias resistors R1 = 47 kΩ and R2/R1 = 0.21, −50 V VCEO, −100 mA IO, and SOT346 (SC-59A) package. It is commonly used in logic-level interface circuits and load switching in consumer and industrial control modules.
For engineers reviewing the PDTA144VK datasheet, PDTA144VK pinout, PDTA144VK application, or PDTA144VK equivalent, this page delivers verified electrical parameters, validated pin configuration for SOT346, real-world use cases in level-shifting and inverter design, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The PDTA144VK integrates two on-die resistors (R1 = 47 kΩ, R2 = 10 kΩ) to form a single-base-biased PNP transistor structure, eliminating external bias components. Its internal resistor network enables direct TTL/CMOS-compatible drive without external pull-up or current-limiting resistors.
It operates as a saturated switch with VCE(sat) ≤ −150 mV at IC = −10 mA / IB = −0.5 mA and supports off-state input voltage (VI(off)) down to −3.1 V - ensuring reliable turn-off under noisy digital logic conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - maximum allowable collector-emitter voltage before breakdown; suitable for 24 V rail switching with safety margin. |
| IO | −100 mA - continuous DC output current capability; supports medium-current loads like LED drivers or small relays. |
| R1 | 47 kΩ ±21% - input bias resistor enabling direct connection to 3.3 V or 5 V logic without external current limiting. |
| R2/R1 | 0.21 - fixed internal resistor ratio defining base current division; ensures predictable saturation behavior across temperature. |
| VCE(sat) | ≤ −150 mV at IC = −10 mA - low saturation voltage minimizes power loss and self-heating in switching mode. |
| hFE | ≥40 at VCE = −5 V, IC = −5 mA - sufficient DC gain for reliable switching with minimal drive overhead. |
| Ptot | 250 mW at Tamb ≤ 25 °C - thermal rating compatible with standard FR4 PCB layouts using SOT346 footprint. |
Pinout & Package
SOT346 (SC-59A/TO-236) plastic surface-mounted package; 3 leads; body dimensions 3.0 × 1.4 × 1.0 mm; standard reflow solderable.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1 and R2 node; accepts logic-level input directly; no external base resistor required. |
| 2 | GND (emitter) | Emitter terminal tied to system ground reference; serves as common return path for switched load current. |
| 3 | output (collector) | Switched high-side output node; sinks current from load connected between VCC and collector. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | R1 = 47 kΩ, R2 = 10 kΩ - reduces BOM count by eliminating two discrete resistors per channel. |
| Logic-compatible input | VI(on) = −3.8 V typical - ensures clean turn-on with standard 3.3 V or 5 V CMOS/TTL outputs. |
| Low saturation voltage | VCE(sat) ≤ −150 mV - limits conduction loss to <1.5 mW at 10 mA, improving efficiency in battery-powered systems. |
| Thermal robustness | Rth(j-a) = 500 K/W - enables stable operation up to +85 °C ambient without derating in typical PCB layouts. |
| ESD tolerance | Human Body Model (HBM) ≥2 kV - provides basic handling protection during assembly without additional clamping. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving multiple indicator LEDs from a 3.3 V microcontroller with limited GPIO current capability. IC Role / Device Role / Timing Role: Acts as a low-side switch that translates logic-high signal into LED sink current path. Use Value: Eliminates need for external base resistor and pull-down; reduces layout area and assembly cost per LED channel. |
Use Scenario: Extending digital output capability of an MCU with only 12 GPIOs to drive 24 peripheral enable lines. IC Role / Device Role / Timing Role: Functions as a non-inverting buffer amplifier with built-in biasing for parallel fan-out. Use Value: Enables direct connection to MCU pins without logic-level translation or current buffering ICs. |
| Inverter Stage | Power Supply Enable Control |
Use Scenario: Building a simple active-low to active-high signal inverter in a space-constrained power management subsystem. IC Role / Device Role / Timing Role: Provides complementary logic inversion with defined threshold via internal R1/R2 divider. Use Value: Achieves clean edge transition and noise immunity without external feedback or hysteresis components. |
Use Scenario: Enabling/disabling a 12 V DC-DC converter based on a 3.3 V system controller's enable signal. IC Role / Device Role / Timing Role: Serves as a level-shifted, current-amplified enable switch controlling the converter's EN pin. Use Value: Delivers sufficient sink current (>5 mA) to meet converter EN pin requirements while maintaining logic compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC144VK | NPN complement; identical SOT346 package, same R1/R2 values, but opposite polarity and current direction. | Requires inverted logic drive and load sourcing instead of sinking; not interchangeable without circuit redesign. | Select when NPN topology matches existing driver architecture or when sourcing load current is preferred. |
| PDTA143VK | R1 = 47 kΩ, R2 = 47 kΩ (R2/R1 = 1.0); higher base current, lower input impedance, VI(on) ≈ −2.0 V. | Less noise-immune turn-on threshold; better suited for low-voltage logic (1.8 V) but less tolerant of floating inputs. | Choose for applications requiring stronger base drive or compatibility with sub-3 V logic families. |
Compared with PDTC144VK, PDTA144VK provides complementary PNP functionality essential for high-side switching or inverting stages, while PDTA143VK offers higher base current for improved drive strength at the expense of reduced noise margin - making each suitable for distinct logic interface strategies.
Availability
PDTA144VK is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, inverter stages, and power supply enable control requiring stable component supply and long-term industrial availability.
Supply support for PDTA144VK 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business. It focuses on automotive, industrial, computing, consumer, and wearable markets.
The PDTA144VK belongs to Nexperia's resistor-equipped transistor (RET) family, engineered specifically for reducing component count and simplifying digital interface design in space- and cost-sensitive applications.
FAQ
What is the package type and lead count of PDTA144VK?
The PDTA144VK uses the SOT346 (SC-59A/TO-236) plastic surface-mounted package with three leads. Its compact 3.0 × 1.4 × 1.0 mm outline supports high-density PCB layouts and standard reflow soldering processes. This package is explicitly confirmed in Table 4 of the official Nexperia datasheet for PDTA144VK.
Does PDTA144VK require external bias resistors?
No, PDTA144VK does not require external bias resistors. It integrates R1 = 47 kΩ and R2 = 10 kΩ internally, forming a complete PNP transistor with built-in base biasing. This eliminates the need for discrete resistors in typical switching applications, as stated in Section 1.1 and Table 2 of the PDTA144V series datasheet.
What is the maximum collector-emitter voltage rating for PDTA144VK?
The maximum collector-emitter voltage (VCEO) for PDTA144VK is −50 V under open-base conditions, as specified in Table 6 (Limiting Values) of the datasheet. This rating applies across the full operating temperature range and defines the absolute maximum reverse bias the device can withstand without breakdown.
Can PDTA144VK be used with 3.3 V logic inputs?
Yes, PDTA144VK is compatible with 3.3 V logic inputs. Its typical on-state input voltage (VI(on)) is −3.8 V, and off-state input voltage (VI(off)) is −3.1 V, ensuring reliable turn-on and turn-off with standard 3.3 V CMOS outputs. This behavior is confirmed in Table 8 (Characteristics) of the datasheet.
What is the thermal resistance from junction to ambient for PDTA144VK?
The thermal resistance from junction to ambient (Rth(j-a)) for PDTA144VK in the SOT346 package is 500 K/W under standard mounting conditions in free air, as listed in Table 7 of the datasheet. This value assumes a typical FR4 PCB layout and guides thermal design for continuous operation up to +85 °C ambient.
PDTA144VK,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 47 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTA144VK,115 FAQ
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7.What is the process for return or replacement of PDTA144VK,115?
All PDTA144VK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA144VK,115, 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 PDTA144VK,115 part is unused and in its original packaging.
Return procedure for PDTA144VK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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