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| ST 2SC945 NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications. The transistor is subdivided into five groups, R, O, Y, P and L, according to its DC current gain. As complementary type the PNP transistor ST 2SA733 is recommended. On special request, these transistors can be manufactured in different pin configurations. TO-92 Plastic Package Weight approx. 0.19g Absolute Maximum Ratings (Ta = 25) Symbol Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Power Dissipation Junction Temperature Storage Temperature Range VCBO VCEO VEBO IC Ptot Tj TS Value 60 50 5 150 250 150 -55 to +150 Unit V V V mA mW O O C C SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) (R) Dated : 22/07/2004 ST 2SC945 Characteristics at Tamb=25 OC Symbol DC Current Gain at VCE=6V, IC=1mA Current Gain Group R O Y P L Collector Base Breakdown Voltage at IC=100A Collector Emitter Breakdown Voltage at IC=10mA Emitter Base Breakdown Voltage at IE=10A Collector Cutoff Current at VCB=40V Emitter Cutoff Current at VEB=3V Collector Saturation Voltage at IC=100mA, IB=10mA Gain Bandwidth Product at VCE=6V, IC=10mA Output Capacitance at VCB=6V, f=1MHz Noise Figure at VCE=6V, IE=0.5mA at f=1KHz, RS=500 NF 4 dB COB 2.5 pF fT 300 MHz VCE(sat) 0.15 0.3 V IEBO 0.1 A ICBO 0.1 A V(BR)EBO 5 V V(BR)CEO 50 V V(BR)CBO 60 V hFE hFE hFE hFE hFE 40 70 120 200 350 80 140 240 400 700 Min. Typ. Max. Unit SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) (R) Dated : 22/07/2004 ST 2SC945 Total power dissipation vs. ambient temperature 300 Free air Normalized collector cutoff current vs. ambient temperature 10000 I CBO(Ta) Normalized collector cutoff current I CBO(Ta=25 C) 250 200 150 100 50 1000 Ptot (mW) 100 10 0 25 50 75 100 125 150 1 0 20 40 60 80 100 120 140 160 Tamb ( C) Tamb ( C) Collector current vs. collector emitter voltage Collector current vs. collector emitter voltage 100 80 60 Ic - mA 1.0 0.9 0.8 0.7 0.6 0.5 0.4 10 8 6 Ic - mA 4.5 4 3.5 3 2.5 2 1.5 1 0.3 40 0.2 4 2 20 I B=0.1mA 0 0 0.4 0.8 1.2 1.6 2.0 0 0 IB=0.5 A 10 20 30 40 50 VCE, V VCE, V h FE - IC 360 360 h FE - IC pulsed VCE=6V pulsed 320 280 DC CURRENT GAIN DC CURRENT GAIN 320 280 Ta=75 C 240 200 25 C 160 120 80 40 0 -25 C 240 VCE=6.0V 200 160 120 80 40 0 0.01 0.1 1 10 100 COLLECTOR CURRENT, mA 3.0V 2.0V 1.0V 0.5V 0.01 0.1 1 10 100 COLLECTOR CURRENT, mA SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) (R) Dated : 22/07/2004 ST 2SC945 Collector current vs. base emitter voltage 100 VCE=6V pulsed Normalized h-parameters vs. collector current 10 Hie VCE=6V f=1kHz He= he(Ic) he(Ic=1mA) Normalized h-parameters 10 C Hre Ic - mA 25 C -25 C 75 1 Ta= Hoe 1 Hfe Hoe Hfe 0.1 Hre Hie 0.01 0.2 0.3 0.4 0.5 0.6 VBE, V 0.7 0.8 0.9 1 0.1 0.1 1 Ic , 10 mA Collector and base saturation voltage vs. collector current 10 pulsed 10000 fT - IE VBE(sat) , V VCE(sat) , V 1 VBE(sat) IC/IB=10 1000 fT - MHz VCE=10V 20 50 50 0.1 VCE(sat) 20 IC/IB=10 100 6V 2V 1V 0.01 0.1 1 10 Collector Current, mA 100 10 -0.1 -1 -10 Emitter Current, mA -100 VEB, VCB vs.Cib, Cob 100 f=1MHz Small signal current gain vs. DC current gain 1000 Small signal current gain VCE=6V Ic=1mA f=1kHz Cib(Ic=0) Cib, Cob - pF 800 600 400 200 10 Cob(IE=0) 1 0.1 0.1 1 10 100 0 200 400 600 800 1000 VEB, VCB - V DC current gain SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) (R) Dated : 22/07/2004 ST 2SC945 100 hoe - Output admittance ( s) 80 60 40 20 hre - Voltage feedback ratio (x10 -4 ) 50 hie - Input impedance(k ) 40 30 20 10 Input impedance, voltage feedback ratio and output admittance vs. small signal current gain 50 40 30 20 10 hoe hre hie Normalized h-parameters vs. collector emitter voltage 3 Normalized h- parameters Ic=1mA f=1kHz he(VCE) He= he(VCE=6V) VCE=6V Ic=1mA f=1kHz 2 hoe hre hfe hie 1 hfe hie hre hoe 0 0 0 200 400 600 800 1000 0 10 VCE - V 20 30 hfe - Small signal current gain SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) (R) Dated : 22/07/2004 |
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