SD4957

Data Sheet No. 2C4957 Chip Type 2C4957 Geometry 0006 Polarity PNP Generic Packaged Parts: 2N4957, 2N4958, 2N4959 Chip type 2C4957 by Semicoa Semiconductors provides performance similar to these devices. Part Numbers: Product Summary: APPLICATIONS: Designed for high-gain, low-noise class A amplifiers, oscillators and mixers. Features: Special Characteristics ft = 1.6 GHz (typ) at 2.0 mA/10V Radiation graphs available 2N4957, 2N4957UB, 2N4958, 2N4958UB, 2N4959, 2N4959UB, SD4957, SD4957F, SQ4957, SQ4957F Mechanical Specifications Metallization Bonding Pad Size Die Thickness Chip Area Top Surface Top Backside Emitter Base Al - 12 kÅ min. Au - 6.5 kÅ nom. 2.3 mils x 2.3 mils 2.3 mils x 2.3 mils 8 mils nominal 16 mils x 16 mils Silox Passivated Electrical Characteristics TA = 25oC Parameter BVCEO BVCBO BVEBO ICBO Test conditions IC = 1.0 mA IC = 100 µA IE = 100 µA VCB = 10 V dc Min 30 30 3.0 --- Max ------0.1 Unit V dc V dc V dc µA hFE VCE = 10 V, IC = 2.0 mA 20 150 --Due to limitations of probe testing, only dc parameters are tested. This must be done with pulse width less than 300 µs, duty cycle less than 2%.