Data Sheet No. 2C2857 Generic Packaged Part: Chip Type 2C2857 Geometry 0011 Polarity NPN 2N2857 Chip type 2C2857 by Semicoa Semiconductors provides performance similar to these devices. Part Numbers: 2N2857, 2N2857UB, SD2857, SD2857F, SQ2857, SQ2857F Product Summary: APPLICATIONS: Designed for use in high-gain, low noise amplifier, oscillator, mixer and UHF converters. Features: ft = 1.2 GHz (typ) at 5 mA/6V Mechanical Specifications Top Backside Emitter Base Metallization Bonding Pad Size Die Thickness Chip Area Top Surface Al - 15 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 Test conditions Min Max Unit BVCEO IC = 3.0 mA 15 --- V dc BVCBO IC = 1.0 µA 30 --- V dc BVEBO IE = 10 µA 2.5 --- V dc ICBO VCB = 15 V --- 0.01 µA dc hFE IC = 3.0 mA dc, VCE = 1.0 V 30 150 --Due to limitations of probe testing, only dc parameters are tested. This must be done with pulse width of less than 300 µs, duty cycle less than 2%.