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PLANETA
The RF Line NPN Silicon High-Frequency Transistor
DESCRIPTION
The BFR91A is an NPN silicon epitaxial transistor designed for low noise amplifier at VHF, UHF and CATV band. It has dynamic range and good current characteristic. This small-signal p lastic transistor offers superior quality and performance at low cost.
BFR91A
1
3
2
FEATURES
1 - Base 2 - Collector 3 - Emitter

High Gain-Bandwidth Products fT= 6.0 GHz (Typ) @ 30 mA Low Noise Figure NF= 1.6 dB (Typ) @ 800 MHz High Gain GPS= 13.0 dB (Typ) @ 800 MHz
SOT37 JEDEC EIAJ GOST Weight: TO-50 - KT-29 0.2g
ABSOLUTE MAXIMUM RATINGS (TA = 25 C)
Rating Collector- Emitter Voltage Collector- Base Voltage Emitter- Base Voltage Collector Current Power Dissipation Junction Temperature Operating Junction Temperature Range Storage Temperature Range Symbol VCEO VCBO VEBO IC Ptot TJMAX TJ TSTG Value 12 20 2 50 300 150 -45 to +70 -65 to +150 Unit V V V mA mW C C C
THERMAL CHARACTERISTIC
Thermal Resistance, Junction to Case RJC 400 C/W
ORDERING INFORMATION
Device BFR91A Marking BFR91A Package SOT-37 Quantity Packing Style 1 Kpcs / plastic bags In bulk
PLANETA JS , 2/13 Fedorovsky Ruchei, Veliky Novgorod, 173004, Russia (c) July 2000 Rev 1
Ph./Fax: +7-816-2231736 E-mail: planeta@novgorod.net http://www.novgorod.net/~planeta
BFR91A
ELECTRICAL CHARACTERISTICS (TA = 25 C unless otherwise noted)
Characteristic DC CHARACTERISTICS Collector Cutoff Current, IE= 0mA, VCB=10V Emitter Cutoff Current, IC= 0mA, VEB= 2V Collector - Emitter Breakdown Voltage, IC= 1mA, IB= 0mA DC Current Gain, IE=30mA, VCB= 5V Collector - Emitter Saturation Voltage, IC= 1mA, IB= 0mA AC CHARACTERISTICS Transition Frequency, IC=30mA, VCB= 5V, f=300MHz Collector-Base Capacitance, IE= 0mA, VCB=10V, f= 1MHz Noise Figure, IE= 5mA, VCE= 8V, f=800MHz Power Gain, IE=30mA, VCE= 8V, f=800MHz hFE CLASSIFICATION Class hFE K 50 to 300 H 50 to 100 F 80 to 160 E 125 to 250 Symbol ICBO - IEBO - V(BR)CEO 12 hFE 50 VCE(sat) - fT 4.5 Ccb - NF - GPS 12.0 13.0 - 1.6 2.0 dB 0.4 0.9 dB 6.0 - pF 100 400 GHz 120 300 mV - - - - 10 V - 100 A Min Typ Max Unit nA
TIPICAL CHARACTERISTICS (TA = 25 C unless otherwise noted)
350 1
300
Ccb - Collector Base Capacitance (pF Ptot - Total Power Dissipation (mW
0,8
250
200
0,6
150
0,4
100
0,2
VCB=10V f=1MHZ
50
0 0 20 40 60 80 100 120 140 160
0 0 5 10 15 20
VCB - Collector Base Voltage (V)
Tamb - Ambient Temperature (C)
Figure 1. Total Power Dissipation vs. Ambient Temperature
Ph./Fax: +7-816-2231736 E-mail: planeta@novgorod.net http://www.novgorod.net/~planeta
Figure 2. Collector - Base Capacitance vs. Collector - Base Voltage
PLANETA JSC, 2/13 Fedorovsky Ruchei, Veliky Novgorod, 173004, Russia (c) July 2000 Rev 1
2
BFR91A
TIPICAL CHARACTERISTICS (TA = 25 C unless otherwise noted)
7 3,5
6
fT - Transition Frequency (GHz
3
4
NF - Noise Figure (dB)
5
2,5
2
3
1,5
2
VCB=5V f=300MHZ
1 VCE=8V f=800MHZ 0,5
1
0 0 5 10 15 20 25 30 35 40 45 50
0 0 5 10 15 20 25 30 35 40
IE - Emitter Current (mA)
IE - Emitter Current (mA
Figure 3. Transition Frequency vs. Emitter Current
14 140
Figure 4. Noise Figure vs. Emitter Current
12
120
GPS - Power Gain (dB)
8
hFE - DC Current Gain
10
100
80
6
60
4
VCE=8V f=800MHZ
40 VCB=5V 20
2
0 0 5 10 15 20 25 30 35 40
0 0 5 10 15 20 25 30
IE - Emitter Current (mA
IE - Emitter Current (mA
Figure 5. Power Gain vs. Emitter Current
Figure 6. DC Current Gain vs. Emitter Current+
PLANETA JS , 2/13 Fedorovsky Ruchei, Veliky Novgorod, 173004, Russia (c) July 2000 Rev 1
Ph./Fax: +7-816-2231736 E-mail: planeta@novgorod.net http://www.novgorod.net/~planeta
3
BFR91A
PACKAGE DIMENSIONS in mm

PLASTIC CASE KT-29
Ph./Fax: +7-816-2231736 E-mail: planeta@novgorod.net http://www.novgorod.net/~planeta
PLANETA JSC, 2/13 Fedorovsky Ruchei, Veliky Novgorod, 173004, Russia (c) July 2000 Rev 1
4

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