NXP Semiconductors PDTA123EM,315

Overview

PDTA123EM from NXP Semiconductors is a PNP resistor-equipped transistor (RET) with integrated 2.2 kΩ base-emitter and base-collector bias resistors, designed for simplified switching in space-constrained PCB layouts. It delivers −100 mA DC output current, −50 V collector-emitter breakdown voltage, and −150 mV saturation voltage at −10 mA collector current, enabling reliable low-power logic-level interfacing in portable consumer electronics.

For engineers reviewing the PDTA123EM datasheet, PDTA123EM pinout, PDTA123EM application, or PDTA123EM equivalent, key selection criteria include its SOT883 ultra-small leadless package (1.0 × 0.6 × 0.5 mm), confirmed PNP polarity with base-input control, and verified −1.2 V to −0.5 V input-off voltage range under IC = −1 mA conditions.

Technical Context

This RET integrates two precision-matched 2.2 kΩ resistors (R1 = R2 = 2.2 kΩ, tolerance ±30%) directly into a monolithic PNP silicon structure, eliminating external bias components while maintaining predictable turn-on/off thresholds. Its fixed resistor ratio (R2/R1 = 1.0) ensures stable current gain control across temperature.

The device operates as a single-stage digital switch with defined input voltage thresholds: Vi(on) = −2.0 V to −1.6 V at IC = −20 mA, and Vi(off) = −1.2 V to −0.5 V at IC = −1 mA, enabling direct interface with 3.3 V and 5 V CMOS/TTL logic families without level-shifting circuitry.

Key Specifications

Pinout & Package

SOT883 is a leadless ultra-small plastic package with 3 solder lands and body dimensions of 1.0 × 0.6 × 0.5 mm. It requires reflow soldering only and is mounted on FR4 with 60 μm copper strip line per standard conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC123EM and NSV123EUX, PDTA123EM uniquely combines PNP sourcing topology, minimal 1.0 × 0.6 mm footprint, and 250 mW power rating-making it optimal for compact, high-efficiency, high-side switching where board area and thermal margin are critical constraints.

Availability

PDTA123EM is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and logic-level inversion requiring stable component supply and long-term manufacturability.

Supply support for PDTA123EM 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 consumer markets.

The PDTA123E series belongs to NXP's resistor-equipped transistor product line, engineered specifically to reduce component count and improve reliability in cost-sensitive, high-volume digital interface applications.

FAQ

Is PDTA123EM RoHS compliant and halogen-free?

Yes. PDTA123EM conforms to RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The SOT883 package uses lead-free matte tin plating over nickel, and all materials meet NXP's EcoDesign requirements as documented in product change notices issued after 2006.

Can PDTA123EM be used in linear amplifier mode?

No. PDTA123EM is characterized and qualified exclusively for switching operation. Its h_FE is specified only at V_CE = −5 V and I_C = −20 mA, and no small-signal parameters (e.g., f_T, C_ob) are provided. Linear use risks unpredictable gain, thermal instability, and premature failure due to uncontrolled bias point drift.

What is the maximum recommended PCB trace width for SOT883 thermal relief?

Per NXP's SOT883 mounting specification (note 3), a 60 μm copper strip line is required. For thermal enhancement, a minimum 0.5 mm wide copper pour connected to pin 2 (emitter) and pin 3 (collector) with ≥4 thermal vias (0.3 mm diameter) to inner ground plane is recommended to maintain R_th(j-a) ≤ 500 K/W at 25 °C ambient.

Does PDTA123EM support wave soldering?

No. The datasheet explicitly states "reflow soldering is the only recommended soldering method" for PDTA123EM (SOT883). Wave soldering causes mechanical stress on the ultra-thin leadframe and risks solder bridging between the closely spaced 0.5 mm pitch solder lands, leading to non-wet opens or short circuits.