LESHAN RADIO COMPANY, LTD. Driver Transistors PNP Silicon MMBTA55LT1 MMBTA56LT1 3 COLLECTOR 1 BASE 3 2 EMITTER 1 2 MAXIMUM RATINGS Rating Symbol Value MMBTA55 MMBTA56 Collector-Emitter Voltage V CEO -60 -80 Vdc Collector-Base Voltage V CBO -60 -80 Vdc Emitter-Base Voltage V Collector Current -- Continuous EBO IC CASE 318-08, STYLE 6 SOT-23 (TO-236AB) Unit -4.0 Vdc -500 mAdc THERMAL CHARACTERISTICS Characteristic Total Device Dissipation FR- 5 Board, (1) TA = 25C Derate above 25C Thermal Resistance, Junction to Ambient Total Device Dissipation Alumina Substrate, (2) TA = 25C Derate above 25C Thermal Resistance, Junction to Ambient Junction and Storage Temperature Symbol Max Unit PD 225 mW R JA PD 1.8 556 300 mW/C C/W mW R JA T J , T stg 2.4 417 -55 to +150 mW/C C/W C DEVICE MARKING MMBTA55LT1 = 2H; MMBTA56LT1 = 2GM ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted.) Characteristic Symbol Min Max Unit OFF CHARACTERISTICS Collector-Emitter Breakdown Voltage (3) (I C = -1.0 mAdc, I B= 0 ) V MMBTA55 MMBTA56 Emitter-Base Breakdown Voltage V Vdc (BR)CEO (BR)EBO -60 -80 -- -- -4.0 -- Vdc -- -0.1 Adc (I E = -100 Adc, I C = 0 ) Collector Cutoff Current ( V CE = -60Vdc, I B = 0) Collector Cutoff Current ( V CB = -60Vdc, I E= 0) MMBTA55 -- -0.1 ( V CB = -80Vdc, I E= 0) MMBTA56 -- -0.1 I CEO Adc I CBO 1. FR-5 = 1.0 x 0.75 x 0.062 in. 2. Alumina = 0.4 x 0.3 x 0.024 in. 99.5% alumina. 3. Pulse Test: Pulse Width <300 s, Duty Cycle <2.0%. M29-1/2 LESHAN RADIO COMPANY, LTD. MMBTA55LT1 MMBTA56LT1 ELECTRICAL CHARACTERISTICS (T A = 25C unless otherwise noted) (Continued) Characteristic Symbol Min Max Unit VCE(sat) 100 100 -- -- -- -0.25 Vdc V BE(on) -- -1.2 Vdc fT 50 -- MHz ON CHARACTERISTICS DC Current Gain (I C = -10 mAdc, V CE = -1.0 Vdc) (I C = -100mAdc, V CE = -1.0 Vdc) Collector-Emitter Saturation Voltage (I C = -100mAdc, I B = -10mAdc) Base-Emitter On Voltage (I C = -100mAdc, V CE = -1.0Vdc) hFE -- SMALL-SIGNAL CHARACTERISTICS Current -Gain-Bandwidth Product(4) (V CE = -1.0 Vdc, I C = -100mAdc, f = 100 MHz) 4. f T is defined as the frequency at which |h f e | extrapolates to unity. M29-2/2