NXP Semiconductors PDTA144WU,115

Overview

PDTA144WU from Nexperia is a PNP resistor-equipped transistor (RET) with integrated bias resistors R1 = 47 kΩ and R2 = 22 kΩ, designed for compact switching applications in space-constrained PCBs. It features V_CEO = −50 V, I_O = −100 mA, V_CEsat ≤ −150 mV at I_C = −10 mA/I_B = −0.5 mA, and operates in SOT323 (SC-70) package with 1.3 mm × 0.65 mm footprint.

For engineers reviewing the PDTA144WU datasheet, PDTA144WU pinout, PDTA144WU application, or PDTA144WU equivalent, this device serves as a drop-in replacement for discrete base-resistor transistor pairs in level-shifting, logic interfacing, and low-power load switching where board area and assembly cost are critical.

Technical Context

This RET integrates two precision silicon resistors directly into the PNP transistor die to eliminate external bias components. Its internal R1–R2 network provides fixed current gain control and ensures stable turn-on/turn-off thresholds across temperature.

The device operates with V_I(off) ≤ −1.7 V and V_I(on) ≥ −4 V, enabling reliable digital signal compatibility with 3.3 V and 5 V CMOS/TTL logic families. Thermal resistance R_th(j-a) = 625 K/W reflects its SOT323 thermal performance under standard FR4 mounting.

Key Specifications

Pinout & Package

PDTA144WU is housed in a plastic surface-mounted SOT323 (SC-70) package measuring 1.3 mm × 0.65 mm × 0.95 mm, optimized for high-density routing and reflow soldering only.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.

Compared with PDTC144WU and EMB144W, PDTA144WU uniquely delivers PNP high-side switching in the smallest standard footprint with highest power density (200 mW in 0.85 mm²), making it optimal for space-limited 3.3 V systems requiring rail-referenced control.

Availability

PDTA144WU is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface translation, and low-power load switching requiring stable component supply and long-term industrial availability.

Supply support for PDTA144WU 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, serving automotive, industrial, computing, consumer, and wearable markets with high-volume, high-reliability components.

The PDTA144W series belongs to Nexperia's resistor-equipped transistor product line, engineered specifically to reduce component count and improve manufacturability in digital interface and switching applications.

FAQ

What is the maximum operating temperature for PDTA144WU?

The junction temperature (T_j) rating is 150 °C, and the ambient operating range is −65 °C to +150 °C. Derating begins above 25 °C ambient per the 625 K/W thermal resistance; at 85 °C ambient, maximum continuous power drops to ~115 mW to maintain T_j ≤ 150 °C.

Can PDTA144WU replace a discrete PNP transistor plus two resistors?

Yes-it replaces a BC807-16 or similar PNP transistor with 47 kΩ base-to-V_CC and 22 kΩ base-to-emitter resistors. Pin-for-pin compatibility in SOT323 eliminates layout changes, and the internal resistors match typical 1/10 W 5% tolerance values used in such designs.

Is reflow soldering required for PDTA144WU?

Yes-reflow soldering is the only recommended method per Nexperia's datasheet. Wave or hand soldering is not qualified due to thermal stress risks on the ultra-small SOT323 package and internal resistor elements; peak reflow temperature must not exceed 260 °C for ≤ 10 seconds.

Does PDTA144WU support 5 V logic input directly?

Yes-its V_I(on) range of −4 V to −2.7 V and V_I(off) of −1.7 V to −1.2 V ensures clean turn-on with 5 V TTL outputs (which swing to ≈0 V low) and immunity to noise on the base node, provided the input source can sink ≥100 µA at 0 V.