MSC1066.PDF 3-10-99
2N2857
DESCRIPTION:
Silicon NPN transistor, designed for UHF equipment. Applications include low noise amplifier; oscillator, and mixer
applications.
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C)
Symbol Parameter Value Unit
VCEO Collector-Emitter Voltage 15 Vdc
VCBO Collector-Base Voltage 30 Vdc
VEBO Emitter-Base Voltage 2.5 Vdc
ICCollector Current 40 mA
Thermal Data
PDTotal Device Dissipation @ TA = 25ºC
Derate above 25ºC 200
1.14 mWatts
mW/ ºC
1
2
3
4
1. Emitter
2. Base
3. Collector
4. Case
TO-72
Features
• Silicon NPN, To-72 packaged UHF Transistor
• 1.6 GHz Current-Gain Bandwidth Product @ 5mA IC
• Maximum Unilateral Gain = 13 dB (typ) @ 500 MHz
RF & MICROWAVE DISCRETE
LOW POWER TRANSISTORS
140 COMMERCE DRIVE
MONTGOMERYVILLE, PA
18936-1013
PHONE: (215) 631-9840
FAX: (215) 631-9855
MSC1066.PDF 3-10-99
2N2857
ELECTRICAL SPECIFICATIONS (Tcase = 25°C)
STATIC
(off)
Symbol Test Conditions Value
Min. Typ. Max. Unit
BVCEO Collector-Emitter Breakdown Voltage
(IC = 3.0 mAdc, IB = 0) 15 - - Vdc
BVCBO Collector-Base Breakdown Voltage
(IC=1.0 µAdc, IE=0) 30 - - Vdc
BVEBO Emitter-Base Breakdown Voltage
(IE = 10 µAdc, IC = 0) 2.5 - - Vdc
ICBO Collector Cutoff Current
(VCE = 15 Vdc, IE = 0 Vdc) - - .01 µA
(on)HFE DC Current Gain
(IC = 3.0 mAdc, VCE = 1.0 Vdc) 30 -150
DYNAMIC
Symbol Test Conditions Value
Min. Typ. Max. Unit
fTCurrent-Gain - Bandwidth Product
(IC = 5.0 mAdc, VCE = 6 Vdc, f = 100 MHz) 1.6 -GHz
NF Noise Figure (50 Ohms)
(IC = 1.5 mAdc, VCE = 6 Vdc, f = 500 MHz) 5.5 dB
MSC1066.PDF 3-10-99
2N2857
FUNCTIONAL
Symbol Test Conditions Value
Min. Typ. Max. Unit
GU max Maximum Unilateral Gain IC = 12 mAdc, VCE = 10Vdc,
f = 500 MHz -13 -dB
MAG Maximum Available Gain IC = 12 mAdc, VCE = 10Vdc,
f = 500 MHz -13.5 -dB
|S21|2Insertion Gain IC = 12 mAdc, VCE = 10Vdc,
f = 500 MHz 9.5 10.5 -dB
Table 1. Common Emitter S-Parameters, @ VCE = 10 V, IC = 12 mA
f
S11
S21
S12
S22
(MHz) |S11| ∠ φ |S21| ∠ φ |S12| ∠ φ |S22| ∠ φ
100 0.457 -44 12.49 122 0.012 63 0.823 -23
200 0.291 -56 8.06 101 0.018 55 0.712 -35
300 0.233 -60 5.3 89 0.024 81 0.728 -46
400 0.212 -68 3.88 80 0.032 55 0.723 -60
500 0.184 -76 3.36 80 0.037 49 0.711 -73
600 0.173 -79 2.97 69 0.043 46 0.717 -86
700 0.192 -89 2.39 61 0.044 44 0.72 -100
800 0.165 -96 1.89 57 0.055 43 0.731 -115
900 0.261 -121 2.72 60 0.068 29 0.746 -131
1000 0.083 149 1.27 39 0.064 18 0.749 -148
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2N2857
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