Datasheet 2SC4791 Datasheet (HIT)

2SC4791

Silicon NPN Epitaxial

Application

VHF / UHF wide band amplifier

Features

• High gain bandwidth product

fT = 10 GHz Typ.

• High gain, low noise figure

PG = 15.5 dB Typ, NF = 1.2 dB Typ at f = 900 MHz

Outline

MPAK-4

2

3

1

4

1. Collector

2. Emitter

3. Base

4. Emitter

2SC4791

Absolute Maximum Ratings (Ta = 25°C)

Item Symbol Ratings Unit

Collector to base voltage V
Collector to emitter voltage V
Emitter to base voltage V
Collector current I
Collector power dissipation P

CBO

CEO

EBO

C

C

Junction temperature Tj 150 °C
Storage temperature Tstg –55 to +150 °C

Electrical Characteristics (Ta = 25°C)

Item Symbol Min Typ Max Unit Test conditions

Collector cutoff current I

Emitter cutoff current I
DC current transfer ratio h

CBO

I

CEO

EBO

FE

Collector output capacitance Cob — 0.4 0.75 pF VCB = 5 V, IE = 0, f = 1 MHz
Gain bandwidth product f

T

Power gain PG 12.5 15.5 — dB VCE = 5 V, IC = 10 mA,

Noise figure NF — 1.2 2.5 dB VCE = 5 V, IC = 5 mA,

Note: Marking is “YA–”.

——10µAVCB = 15 V, IE = 0
——1 mAV
——10µAVEB = 1.5 V, IC = 0
50 120 250 VCE = 5 V, IC = 10 mA

7.0 10.0 — GHz VCE = 5 V, IC = 10 mA

15 V
8V

1.5 V
20 mA
150 mW

= 8 V, RBE = ∞

CE

f = 900 MHz

f = 900 MHz

Attention: This is electrostatic sensitive device.

2

Maximum Collector Dissipation Curve

150

(mW)

C

100

200

FE

160

120

DC Current Transfer Ratio

vs. Collector Current

V = 5V

CE

2SC4791

50

Collector Power Dissipation P

0

Ambient Temperature Ta (°C)

15010050

Gain Bandwidth Product

vs. Collector Current

12

V = 5 V

CE

10

T

8

6

V = 1 V

CE

4

2

Gain Bandwidth Product f (GHz)

0

12 51020 50

Collector Current I (mA)

C

80

V = 1V

CE

40

DC Current Transfer Ratio h

0

0.1

0.2 0.5 1 2 5 10 20 50
Collector Current I (mA)

C

Collector Output Capacitance vs.

Collector to Base Voltage

0.56
I = 0

E

0.52

f = 1 MHz

0.48

0.44

0.40

0.36

Collector Output Capacitance Cob (pF)

0.5

12 51020

Collector to Base Voltage V (V)

CB

3

2SC4791

Power Gain vs. Collector Current

20

f = 900 MHz

16

12

8

Power Gain PG (dB)

4

0

0.3

1310

Collector Current I (mA)

V = 5V

CE

V = 1V

CE

C

30

Noise Figure vs. Collector Current

5

f = 900 MHz

4

3

2

Noise Figure NF (dB)

1

V = 5V

CE

V = 1V

CE

0

0.3 1 3 10 30
Collector Current I (mA)

C

4

2SC4791

S11 Parameter vs. Frequency

1

.8

.6

.4

.2

.4

0

.2

.6 .8

1.0

1.5

–.2

–.4

–.6

–.8

–1

Condition: V = 5 V , Zo = 50

CE

200 to 2000 MHz (200 MHz step)

(I = 5 mA)

C

(I = 10 mA)

C

S12 Parameter vs. Frequency

1.5

2

–1.5

2

345

–2

Ω

3

10

–3

4

–4

5

–10

–5

10

180°

–150°

S21 Parameter vs. Frequency

90°

120°

150°

–120°

Condition: V = 5 V , Zo = 50

–90°

CE

200 to 2000 MHz (200 MHz step)

(I = 5 mA)

C

(I = 10 mA)

C

S22 Parameter vs. Frequency

Scale: 4 / div.

60°

30°

0°

–30°

–60°

Ω

180°

–150°

120°

90°

150°

–120°

Condition: V = 5 V , Zo = 50

–90°

CE

200 to 2000 MHz (200 MHz step)

(I = 5 mA)

C

(I = 10 mA)

C

Scale: 0.04 / div.

60°

30°

0°

–30°

–60°

Ω

1

.8

.6

.4

.2

.4 .6

.8 1.0 2 3 4 5 10

0

.2

1.5

–.2

–.4

–.6

–.8

–1

Condition: V = 5 V , Zo = 50

CE

200 to 2000 MHz (200 MHz step)

(I = 5 mA)

C

(I = 10 mA)

C

1.5

–1.5

2

–2

3

4

5

10

–10

–5

–4

–3

Ω

5

2SC4791

S11 Parameter vs. Frequency

1

.8

.6

.4

.2

0

.2 .4

.6 .8

1.0

1.5

–.2

–.4

–.6

–.8

Condition: V = 1 V , Zo = 50

CE

–1

–1.5

200 to 2000 MHz (200 MHz step)

(I = 0.5 mA)

C

(I = 1 mA)

C

S12 Parameter vs. Frequency

1.5

2

S21 Parameter vs. Frequency

Scale: 0.8 / div.

2

120°

3

4

5

150°

90°

60°

30°

10

10

5

4

3

180°

0°

–10

–5

–3

–4

–150°

–30°

–2

–120°

Ω

Condition: V = 1 V , Zo = 50

–90°

CE

–60°

Ω

200 to 2000 MHz (200 MHz step)

(I = 0.5 mA)

C

(I = 1 mA)

C

S22 Parameter vs. Frequency

180°

–150°

150°

Scale: 0.06 / div.

90°

120°

–120°

Condition: V = 1 V , Zo = 50

–90°

CE

60°

–60°

200 to 2000 MHz (200 MHz step)

(I = 0.5 mA)

C

(I = 1 mA)

C

30°

–30°

Ω

0°

1

.8

.6

.4

.2

0

.2

.4

.6 .8 1.0

1.5

–.2

–.4

–.6

–.8

–1

Condition: V = 1 V , Zo = 50

CE

200 to 2000 MHz (200 MHz step)

(I = 0.5 mA)

C

(I = 1 mA)

C

1.5

2

–1.5

2

3

345 10

–3

–2

Ω

4

–4

5

10

–10

–5

6

2SC4791

S Parameter (VCE = 5 V, IC = 5 mA, ZO = 50 Ω, Emitter Common)

Freq. S11 S21 S12 S22
(MHz) MAG. ANG. MAG. ANG. MAG. ANG. MAG. ANG.

100 0.859 –15.9 13.192 165.5 0.016 82.3 0.974 –9.3
200 0.790 –30.6 12.225 151.9 0.031 73.9 0.914 –17.5
300 0.700 –44.0 10.967 139.9 0.043 68.2 0.841 –24.2
400 0.618 –54.8 9.802 130.2 0.053 64.0 0.771 –29.2
500 0.543 –64.7 8.686 122.4 0.061 61.4 0.710 –32.5
600 0.477 –73.3 7.761 116.0 0.068 59.8 0.660 –34.8
700 0.421 –80.1 6.955 110.2 0.074 58.9 0.619 –36.7
800 0.369 –86.3 6.316 105.5 0.080 58.7 0.584 –38.2
900 0.331 –92.8 5.748 101.0 0.086 58.1 0.557 –39.3
1000 0.287 –99.4 5.275 97.6 0.091 57.9 0.535 –40.3
1100 0.226 –104.8 4.869 94.1 0.097 57.9 0.517 –41.2
1200 0.220 –110.7 4.498 90.6 0.102 58.1 0.502 –42.1
1300 0.200 –110.7 4.169 88.2 0.107 58.4 0.492 –43.1
1400 0.179 –125.0 3.926 85.4 0.113 58.2 0.479 –44.2
1500 0.159 –131.7 3.698 83.0 0.119 58.2 0.471 –44.9
1600 0.142 –138.0 3.493 80.5 0.125 58.4 0.463 –46.0
1700 0.126 –147.6 3.311 78.1 0.130 58.5 0.456 –47.2
1800 0.117 –154.1 3.143 76.1 0.136 58.2 0.450 –48.2
1900 0.109 –166.9 3.008 74.0 0.142 58.0 0.445 –49.3
2000 0.102 179.8 2.864 71.9 0.147 57.9 0.440 –50.4

7

2SC4791

S Parameter (VCE = 5 V, IC = 10 mA, ZO = 50 Ω, Emitter Common)

Freq. S11 S21 S12 S22
(MHz) MAG. ANG. MAG. ANG. MAG. ANG. MAG. ANG.

100 0.758 –22.4 19.871 159.8 0.015 78.6 0.942 –12.6
200 0.650 –41.5 17.252 142.4 0.028 71.0 0.842 –22.5
300 0.538 –57.1 14.423 129.0 0.037 66.8 0.739 –28.5
400 0.445 –69.1 12.168 119.4 0.045 64.3 0.659 –32.0
500 0.383 –79.6 10.376 112.2 0.052 63.3 0.600 –33.7
600 0.320 –87.8 8.995 106.7 0.058 63.4 0.577 –34.9
700 0.274 –95.4 7.914 101.8 0.065 63.7 0.524 –35.4
800 0.230 –102.4 7.057 97.8 0.071 64.0 0.499 –36.3
900 0.205 –109.8 6.332 93.9 0.076 64.4 0.480 –36.7
1000 0.174 –116.9 5.778 91.0 0.083 64.5 0.466 –37.4
1100 0.154 –125.9 5.291 88.1 0.089 64.6 0.454 –38.0
1200 0.131 –135.1 4.862 85.4 0.096 64.7 0.444 –38.7
1300 0.118 –142.7 4.508 82.9 0.102 64.6 0.438 –39.4
1400 0.108 –154.7 4.226 80.8 0.109 64.5 0.431 –40.4
1500 0.104 –165.2 3.961 78.7 0.116 64.3 0.426 –41.4
1600 0.093 –178.6 3.718 76.4 0.122 64.1 0.420 –42.4
1700 0.095 169.4 3.532 74.3 0.129 64.0 0.417 –43.6
1800 0.094 158.4 3.347 72.4 0.135 63.4 0.413 –44.8
1900 0.094 148.2 3.190 70.5 0.142 63.2 0.409 –46.0
2000 0.101 136.0 3.036 68.6 0.148 63.0 0.406 –47.3

8

2SC4791

S Parameter (VCE = 1 V, IC = 0.5 mA, ZO = 50 Ω, Emitter Common)

Freq. S11 S21 S12 S22
(MHz) MAG. ANG. MAG. ANG. MAG. ANG. MAG. ANG.

100 0.983 –6.6 1.757 174.0 0.023 85.8 0.995 –4.1
200 0.976 –13.1 1.723 167.3 0.047 80.7 0.990 –8.2
300 0.961 –19.6 1.741 160.2 0.071 76.4 0.980 –12.3
400 0.938 –26.2 1.734 154.0 0.093 71.9 0.966 –16.4
500 0.920 –32.5 1.666 147.6 0.093 67.6 0.950 –20.1
600 0.903 –38.6 1.629 142.6 0.133 63.4 0.932 –23.9
700 0.868 –44.6 1.584 136.2 0.151 59.9 0.913 –27.3
800 0.836 –50.4 1.564 130.6 0.166 56.2 0.891 –30.6
900 0.819 –56.1 1.520 125.3 0.180 52.8 0.869 –33.8
1000 0.780 –61.6 1.484 120.3 0.193 49.5 0.849 –36.8
1100 0.749 –66.9 1.434 115.3 0.204 46.7 0.828 –39.6
1200 0.713 –71.7 1.369 110.4 0.213 44.0 0.810 –42.1
1300 0.687 –77.0 1.322 107.2 0.221 41.4 0.794 –44.8
1400 0.659 –82.2 1.317 102.3 0.229 38.9 0.774 –47.3
1500 0.629 –86.9 1.282 98.5 0.234 36.7 0.757 –49.7
1600 0.601 –91.2 1.248 94.6 0.239 34.6 0.741 –51.9
1700 0.578 –96.7 1.215 91.0 0.243 32.4 0.726 –54.2
1800 0.656 –101.0 1.187 87.5 0.248 30.4 0.713 –56.3
1900 0.532 –106.3 1.155 84.4 0.249 28.9 0.699 –58.4
2000 0.508 –111.4 1.124 81.0 0.251 27.3 0.686 –60.5

9

2SC4791

S Parameter (VCE = 1 V, IC = 1 mA, ZO = 50 Ω, Emitter Common)

Freq. S11 S21 S12 S22
(MHz) MAG. ANG. MAG. ANG. MAG. ANG. MAG. ANG.

100 0.969 –8.3 3.406 172.8 0.023 84.7 0.992 –5.3
200 0.953 –16.4 3.337 165.1 0.046 79.1 0.980 –10.3
300 0.927 –25.1 3.270 157.0 0.070 73.7 0.960 –15.8
400 0.896 –33.0 3.218 149.3 0.090 68.8 0.933 –20.8
500 0.860 –40.5 3.068 143.0 0.108 64.2 0.905 –25.1
600 0.820 –47.7 2.950 136.9 0.124 59.7 0.874 –29.3
700 0.778 –54.5 2.816 130.7 0.139 56.3 0.844 –33.2
800 0.731 –61.1 2.711 124.8 0.151 52.9 0.810 –36.7
900 0.703 –67.5 2.580 119.7 0.162 49.8 0.780 –39.9
1000 0.657 –73.8 2.470 114.8 0.171 46.9 0.752 –42.8
1100 0.617 –79.8 2.363 110.2 0.178 44.7 0.725 –45.5
1200 0.575 –84.8 2.229 105.3 0.185 42.5 0.703 –47.7
1300 0.549 –89.8 2.104 102.4 0.191 40.8 0.686 –50.1
1400 0.516 –96.2 2.053 97.9 0.196 38.8 0.660 –52.5
1500 0.485 –101.5 1.975 94.3 0.199 37.6 0.641 –54.5
1600 0.456 –106.7 1.891 90.9 0.203 36.2 0.623 –56.4
1700 0.429 –111.9 1.827 87.8 0.206 34.9 0.607 –58.3
1800 0.412 –115.9 1.751 84.6 0.209 33.7 0.593 –60.3
1900 0.389 –122.6 1.700 81.7 0.211 33.2 0.580 –62.1
2000 0.368 –128.0 1.645 78.8 0.212 32.4 0.567 –64.1

10

0.4

+ 0.1
– 0.05

2.95 ± 0.2

1.9 ± 0.2

0.95 0.95

0.4

+ 0.1

– 0.05

0.65

0.16

+ 0.1
– 0.06

Unit: mm

0.4

+ 0.1
– 0.05

0.95

1.8 ± 0.2

0.85

0.6

+ 0.1
– 0.05

0.3

+ 0.2

1.1

1.5 ± 0.15

0.65

– 0.1

+ 0.2

– 0.6

2.8

Hitachi Code
JEDEC
EIAJ
Weight

0 – 0.1

(reference value)

MPAK-4
—
Conforms

0.013 g

Cautions

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received the latest product standards or specifications before final design, purchase or use.

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contact Hitachi’s sales office before using the product in an application that demands especially high
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of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.

4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail­safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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