SFT4957A2 SSDI | Alldatasheet

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Solid State Devices, Inc.

14830 Valley View Blvd * La Mirada, Ca 90638

Phone: (562) 404-7855 * Fax: (562) 404-1773 ssdi@ssdi-power.com * www.ssdi-power.com DESIGNER’S DATA SHEET Part Number / Ordering Information 1/ SFT4957A2 __ __ └ Screening 2/ __ = Commercial TX = TX Level TXV = TXV Level S = S Level └ Package: GW = Gullwing SFT4957A2 Series Dual Microminiature Package 30 mA 30 Volts Dual PNP RF Transistor Features:

  • RF Switching Transistor
  • Multiple Devices Reduce Board Space
  • Replacement/Enhancement for 2N4957UB
  • TX, TXV, S-Level screening available
  • NPN complimentary parts available (SFT2857A2) Maximum Ratings Symbol Value Units Collector – Emitter Voltage V CEO 30 Volts Collector – Base Voltage V CBO 30 Volts Emitter – Base Voltage V EBO 3 Volts Continues Collector Current I C 30 mAmps Power Dissipation @ TC = 25ºC (each device) P D 200 mW Operating & Storage Temperature Top & Tstg -65 to +200 ºC Maximum Thermal Resistance (Junction to PCB) R θJC 290 ºC/W Gullwing (GW) NOTE: All specifications are subject to change without notification. SCD's for these devices should be reviewed by SSDI prior to release. DATA SHEET #: TR0077 A Doc

Solid State Devices, Inc. Phone: (562) 404-7855 * Fax: (562) 404-1773 ssdi@ssdi-power.com * www.ssdi-power.com SFT4957A2 Series Electrical Characteristic 4/ Symbol Min Max Units Collector – Emitter Sustaining Voltage IC = 1 mA BVCEO -30 –– Volts Collector Cutoff Current Vcb = -20 V ICBO1 –– 100 nA Collector Cutoff Current Vcb = -30 V ICBO2 –– 100 uA Collector Cutoff Current Vcb = -20 V, Ta= 150ºC ICBO3 –– 100 uA Emitter Cutoff Current Veb = -3.0 V IEBO –– 100 uA DC Forward Current Transfer Ratio * VCE = -10V, IC = 0.5 mA VCE = -10V, IC = 2.0 mA VCE = -10V, IC = 5 mA VCE = -10V, IC =5 mA, Ta= -55ºC HFE1 HFE2 HFE3 HFE4 165 Frequency Transition (Small Signal Current Gain) @ f= 100 MHz VCE = -10V, IC = 2.0 mA hfe 12 36 CB feedback (output) Capacitance VCE = -10V, f = 1MHz ccb –– 0.8 pF CB time constant VCE =-10V, IC =2mA, f= 63.6 MHz rbCc 1.0 16 psec Common emitter small signal power gain VCE =-10V, IC = 2mA, f= 450 MHz Gpe 17 25 dB Noise Figure Ic = 2 mA, Vce = -10 V, RL = 50Ω, f = 450 MHz NF –– 3.5 dB NOTES: * Pulse Test: Pulse Width = 300µsec, Duty Cycle = 2% 1/ For Ordering Information, Price, and Availability Contact Factory. 2/ Screening per MIL-PRF-19500 3/ For Package Outlines Contact Factory. 4/ Unless Otherwise Specified, All Electrical Characteristics @25ºC. Available Part Numbers: SFT4957A2GW PIN ASSIGNMENT Package Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 GW Collector1 Base1 Emitter1 Collector2 Base2 Emitter2 NOTE: All specifications are subject to change without notification. SCD's for these devices should be reviewed by SSDI prior to release. DATA SHEET #: TR0077 A Doc