Important notice Dear Customer, On 7 February 2017 the former NXP Standard Product business became a new company with the tradename Nexperia. Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS semiconductors with its focus on the automotive, industrial, computing, consumer and wearable application markets In data sheets and application notes which still contain NXP or Philips Semiconductors references, use the references to Nexperia, as shown below. Instead of PDTC124X series NPN resistor-equipped transistors R1 = 22 k , R2 = 47 k Rev. 07 16 November 2009 Product data sheet 1. Product profile 1.1 General description NPN Resistor-Equipped Transistors (RET) family. Table 1. Product overview Type number Package PNP complement NXP JEITA JEDEC PDTC124XE SOT416 SC-75 - PDTA124XE PDTC124XEF SOT490 SC-89 - PDTA124XEF PDTC124XK SOT346 SC-59A TO-236 PDTA124XK PDTC124XM SOT883 SC-101 - PDTA124XM 1 PDTC124XS SOT54 SC-43A TO-92 PDTA124XS PDTC124XT SOT23 - TO-236AB PDTA124XT PDTC124XU SOT323 SC-70 - PDTA124XU 1 Also available in SOT54A and SOT54 variant packages (see Section 2). 1.2 Features Built-in bias resistors Reduces component count Simplifies circuit design Reduces pick and place costs 1.3 Applications General-purpose switching and Circuit drivers amplification Inverter and interface circuits 1.4 Quick reference data Table 2. Quick reference data Symbol Parameter Conditions Min Typ Max Unit V collector-emitter voltage open base - - 50 V CEO I output current - - 100 mA O R1 bias resistor 1 (input) 15.4 22 28.6 k R2/R1 bias resistor ratio 1.7 2.1 2.6