Nexperia USA Inc. PDTC115EM,315

Overview

PDTC115EM from NXP Semiconductors is an NPN resistor-equipped transistor (RET) with integrated 100 kΩ base bias resistors (R1 and R2), designed for compact digital switching in space-constrained PCB layouts. It supports DC output current up to 20 mA, exhibits V_CEO = 50 V, V_EBO = 10 V, and achieves V_CEsat ≤ 150 mV at I_C = 5 mA / I_B = 0.25 mA - enabling reliable low-power logic-level interfacing in portable consumer electronics.

For engineers reviewing the PDTC115EM datasheet, PDTC115EM pinout, PDTC115EM application, or PDTC115EM equivalent, this device serves as a drop-in replacement for discrete BJT + two-resistor configurations in level-shifting, LED driving, and microcontroller I/O buffering where board area and assembly cost are critical.

Technical Context

This RET integrates two precision-matched 100 kΩ bias resistors (R1 between base and input, R2 between base and emitter) to eliminate external components while maintaining predictable turn-on/off thresholds. Its internal resistor ratio (R2/R1 = 1.0 ± 0.2) ensures stable saturation behavior across temperature.

The SOT883 package enables ultra-small footprint (1.0 × 0.6 × 0.5 mm) and thermal resistance of 500 K/W under reflow-soldered FR4 conditions. Device operation is specified from −65 °C to +150 °C ambient, with junction temperature limited to 150 °C.

Key Specifications

Pinout & Package

SOT883 is a leadless ultra-small plastic package (1.0 × 0.6 × 0.5 mm) with three solder lands on the bottom surface, optimized for high-density reflow assembly. It requires no through-hole drilling and supports automated optical inspection (AOI) via top-side marking "DV".

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC124EM and MMBT3904LT1G, PDTC115EM offers deterministic 100 kΩ input impedance and tighter V_i(on)/V_i(off) windows - reducing qualification effort in high-volume consumer designs where consistency matters more than marginal gain.

Availability

PDTC115EM is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O buffering, and logic-level translation requiring stable component supply and long-term manufacturability in compact portable devices.

Supply support for PDTC115EM 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.

PDTC115EM belongs to the PDTC115E series of resistor-equipped transistors, engineered specifically to replace discrete BJT + resistor combinations in cost-sensitive, high-density digital interface applications.

FAQ

What is the maximum allowable input voltage applied to the base (pin 1) of PDTC115EM?

The absolute maximum input voltage (V_I) is +40 V positive and −10 V negative, as specified in the Limiting Values table. Exceeding these values risks permanent damage to the internal bias resistors or junction. For reliable 3.3 V or 5 V logic operation, no external clamping is required due to the built-in resistor network's inherent current limiting.

Can PDTC115EM be used in linear amplifier mode, or is it strictly for switching?

PDTC115EM is characterized and optimized for switching applications, with guaranteed parameters like V_CEsat, I_O, and V_i(on)/V_i(off) - not small-signal AC gain or frequency response. While it can operate in active region, its h_FE variation (80 min, no max) and lack of AC specs make it unsuitable for precision analog amplification.

Does the SOT883 package support hand soldering or require reflow only?

Reflow soldering is the only recommended method per NXP's datasheet Note 2. The SOT883's 0.4 mm pitch, bottom-termination design, and thermal mass make hand soldering unreliable and prone to cold joints or tombstoning. Reflow profile must follow JEDEC J-STD-020D for lead-free processes with peak temperature ≤ 260 °C.

How does the internal resistor ratio affect noise immunity in noisy environments?

A resistor ratio (R2/R1) of 0.8–1.2 ensures predictable hysteresis-free switching with V_i(off) ≈ 0.5 V and V_i(on) ≈ 1.5–3.0 V. This 1.0 V nominal input window provides moderate noise margin against EMI-induced glitches on short PCB traces, though external RC filtering is advised for >10 cm cable runs or high-dV/dt environments.