NXP Semiconductors PDTC143EEF,115

Overview

PDTC143EEF from NXP Semiconductors is an NPN resistor-equipped transistor with integrated bias resistors R1 = 4.7 kΩ and R2 = 4.7 kΩ, designed for general-purpose switching in compact surface-mount applications. It supports V_CEO = 50 V, I_O = 100 mA DC output current, and operates across −65 °C to +150 °C ambient temperature, commonly used in logic-level interface circuits and low-power inverters.

For engineers reviewing the PDTC143EEF datasheet, PDTC143EEF pinout, PDTC143EEF application, or PDTC143EEF equivalent, key selection criteria include its SC-89 (SOT490) package footprint, built-in resistor ratio of 1:1, input-off voltage of 0.5–1.1 V, and suitability for space-constrained PCBs requiring reduced component count and simplified drive circuitry.

Technical Context

The PDTC143EEF integrates two precision 4.7 kΩ bias resistors to form a monolithic NPN digital transistor, eliminating external base resistors. Its internal resistor ratio (R2/R1) is tightly controlled at 0.8–1.2, enabling predictable turn-on/off thresholds under varying supply conditions.

It features V_CE(sat) ≤ 150 mV at I_C = 10 mA / I_B = 0.5 mA and h_FE ≥ 30 at V_CE = 5 V / I_C = 10 mA, supporting reliable saturation in low-voltage logic interfacing. The device uses standard reflow soldering only and is rated for T_j ≤ 150 °C.

Key Specifications

Pinout & Package

PDTC143EEF is housed in a plastic surface-mounted SOT490 (SC-89) package measuring 1.7 mm × 0.95 mm × 0.5 mm, optimized for high-density PCB assembly and reflow-only processing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN digital transistor applications.

Compared with PDTC143EK and PDTC143EU, the PDTC143EEF offers the optimal balance of compactness (SOT490), thermal performance (R_th(j-a) = 500 K/W), and manufacturability for automated SMT lines-making it the default choice for new 3.3 V logic interface designs where footprint and reliability are both critical.

Availability

PDTC143EEF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, and small-signal relay drivers requiring stable component supply and long-term obsolescence management.

Supply support for PDTC143EEF 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The PDTC143EEF belongs to NXP's resistor-equipped transistor (RET) product line, engineered to simplify discrete logic interfacing and reduce bill-of-materials cost in consumer and industrial control systems.

FAQ

What is the package type and dimensions of the PDTC143EEF?

The PDTC143EEF uses the SOT490 (SC-89) surface-mount package, measuring 1.7 mm in length, 0.95 mm in width, and 0.5 mm in height. Its three-terminal configuration supports automated pick-and-place assembly and reflow soldering only, with no through-hole variant available. This compact outline makes the PDTC143EEF ideal for space-limited PCB layouts in portable and wearable electronics.

Does the PDTC143EEF require external base resistors?

No, the PDTC143EEF does not require external base resistors because it integrates R1 = 4.7 kΩ and R2 = 4.7 kΩ internally. These matched resistors provide fixed biasing for reliable NPN switching behavior, allowing direct connection of logic-level signals to Pin 1 (base). This eliminates two passive components per instance and reduces design validation effort for the PDTC143EEF in standard interface roles.

What is the maximum continuous collector current for the PDTC143EEF?

The PDTC143EEF supports a maximum DC output current (I_O) of 100 mA, as specified in the Quick Reference Data and Limiting Values sections of its datasheet. This rating applies under standard mounting conditions at T_amb ≤ 25 °C. Derating is required above this temperature, following the 250 mW total power dissipation limit and thermal resistance of 500 K/W.

Can the PDTC143EEF be used with 3.3 V logic signals?

Yes, the PDTC143EEF is fully compatible with 3.3 V logic signals: its V_i(on) range (1.9–2.5 V) ensures reliable turn-on, and V_i(off) (0.5–1.1 V) guarantees solid cutoff when driven by standard CMOS outputs. No level-shifting circuitry is needed, making the PDTC143EEF a drop-in solution for modern low-voltage microcontroller and FPGA interface designs.

What is the PNP complement of the PDTC143EEF?

The PNP complement of the PDTC143EEF is the PDTA143EEF, which shares the same SOT490 package, matching 4.7 kΩ bias resistors, and symmetrical electrical specifications (e.g., V_EBO = 10 V, I_O = 100 mA). This pairing allows designers to implement complementary switching stages-such as push-pull drivers or H-bridge half-cells-using functionally matched RETs, simplifying layout and qualification for the PDTC143EEF and PDTA143EEF together.