NPN SILICON
OSCILLATOR AND MIXER TRANSISTOR
NE944
SERIES
FEATURES
LOW COST
HIGH GAIN BANDWIDTH PRODUCT:
f
T
= 2000 MHz TYP
LOW COLLECTOR TO BASE TIME CONSTANT:
C
C
r
b'b
= 5 ps TYP
LOW FEEDBACK CAPACITANCE: C
RE
= 0.55 pF TYP
The NE944 series of NPN silicon epitaxial bipolar transistors
is intended for use in general purpose UHF oscillator and
mixer applications. It is suitable for automotive keyless entry
and TV tuner designs.
The device features stable oscillation and small frequency
drift during changes in the supply voltage and over the
ambient temperature range.
DESCRIPTION
PART NUMBER
NE94430
NE94433
EIAJ
1
REGISTERED NUMBER
2SC4184
2SC3545
PACKAGE CODE
30
33
SYMBOLS
PARAMETERS AND CONDITIONS
UNITS MIN
TYP MAX
MIN
TYP MAX
I
CBO
Collector Cutoff Current, V
CB
= 12 V, I
E
= 0
A
0.1
0.1
h
FE
DC Current Gain, V
CE
= 10 V, I
C
= 5.0 mA
40
100
200
50
100
250
V
CE(sat)
Collector Saturation Voltage, I
C
= 10 mA, I
B
= 1.0 mA
V
0.5
0.5
f
T
Gain Bandwidth Product, V
CE
= 3 V, I
E
= 5 mA
GHz
1.2
2.0
1.3
2.0
C
OB
Output Capacitance, V
CB
= 3 V, I
E
= 0 mA, f = 1.0 MHz
pF
0.7
1.2
C
C
r
b'b
Collector to Base Time Constant, V
CE
= 3 V,
I
E
= -5.0 mA, f = 31.9 MHz
ps
3.5
8.0
5.0
C
RE
Feedback Capacitance, V
CB
= 10 V, I
E
= 0 mA, f = 1.0 MHz
pF
0.55
1.0
R
TH (J-C)
Thermal Resistance, Junction to Case (infinite heat sink)
C/W
200
200
R
TH (J-A)
Thermal Resistance, Junction to Ambient (free air)
C/W
833
620
P
T
Power Dissipation
mW
150
150
ELECTRICAL CHARACTERISTICS
(T
A
= 25
C)
Note:
1. Electronic Industrial Association of Japan.
California Eastern Laboratories
Collector to Base Voltage, V
CB
(V)
Feedback Capacitance, Cre (pF)
TYPICAL DEVICE CAPACITANCE vs.
COLLECTOR TO BASE VOLTAGE
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= 25
C)
SYMBOLS
PARAMETERS
UNITS
RATINGS
V
CBO
Collector to Base Voltage
V
30
V
CEO
Collector to Emitter Voltage
V
15
V
EBO
Emitter to Base Voltage
V
3.0
I
C
Collector Current
mA
50
T
J
Junction Temperature
NE94432, NE94433
C
125
NE94430
C
150
T
STG
Storage Temperature
C
-55 to +125
TOTAL POWER DISSIPATION
vs. AMBIENT TEMPERATURE
DC Current Gain, h
FE
Collector Current, I
C
(mA)
Collector Current, I
C
(mA)
Gain Bandwidth Product, ft (GHz)
GAIN BANDWIDTH PRODUCT vs.
COLLECTOR CURRENT
Total Power Dissipation, P
T
(mW)
Ambient Temperature, T
A
(
C)
TYPICAL PERFORMANCE CURVES
(T
A
= 25
C)
DC CURRENT GAIN vs.
COLLECTOR CURRENT
Note:
1. Operation in excess of any one of these parameters may result in
permanent damage.
NE944 SERIES
0 25 50 75 100 125 150
300
250
200
150
100
50
0
NE94430
NE94433
FREE AIR
FREE AIR
0.5 1 5 10 50
200
100
92
10
20
50
V
CE
= 10 V
V
CE
= 3 V
3
2
1
0.7
0.3
0.2
0.1
5
0.5
0.5 0.7
2
3
5
7 10
20
30
50
1
V
CE
= -5 V
f = 1.0 MHz
1 2 3 5 7 10 20 30
3
2
1
0.7
0.5
0.3
0.2
0.1
NE944 SERIES
FREQ.
NF
OPT
G
A
OPT
(MHz)
(dB)
(dB)
MAG
ANG
Rn/50
V
CE
= 2.5 V, I
C
= 2.5 mA
500
3.2
11.34
0.33
63
0.75
1000
5.4
7.22
0.29
142
0.45
1500
6.7
4.44
0.32
165
0.64
V
CE
= 3 V, I
C
= 5 mA
500
3.8
12.67
0.27
79
0.70
1000
6.3
8.28
0.28
168
0.48
1500
8.3
5.58
0.38
-175
0.55
V
CE
= 10 V, I
C
= 5 mA
500
3.8
13.88
0.27
69
0.75
1000
6.3
9.53
0.27
160
0.58
1500
8.3
6.63
0.32
174
0.68
NE94430
TYPICAL NOISE PARAMETERS
(T
A
= 25
C)
FREQ.
NF
OPT
G
A
OPT
V
CE
I
C
(MHz)
(dB)
(dB)
MAG
ANG Rn/50
(V)
(mA)
V
CE
= 8 V, I
C
= 5 mA
500
3.6
13.00
.43
51
1.0
8
5
1000
5.8
9.34
.29
113
0.7
8
5
V
CE
= 10 V, I
C
= 5 mA
500
3.6
12.90
.44
.51
1.04
10
5
1000
6.0
8.90
.32
117
.70
10
5
NE94433
TYPICAL NOISE PARAMETERS
(T
A
= 25
C)
TYPICAL COMMON EMITTER SCATTERING PARAMETERS
(T
A
= 25
C)
V
CE
= 2.5 V, I
C
= 2.5 mA
Coordinates in Ohms
Frequency in GHz
(V
CE
= 2.5 V, I
C
= 2.5 mA)
NE94430
FREQUENCY
S
11
S
21
S
12
S
22
K
S
21
MAG
1
(MHz)
MAG
ANG
MAG
ANG
MAG
ANG
MAG
ANG
(dB)
(dB)
50
.929
-13.0
4.051
160.3
.017
89.3
.977
-6.0
0.10
12.2
23.8
100
.854
-24.4
3.892
148.7
.030
66.4
.936
-10.9
0.47
11.8
21.1
200
.735
-50.1
3.591
129.9
.049
56.9
.843
-16.2
0.65
11.1
18.7
300
.608
-74.2
3.285
114.9
.060
53.8
.788
-18.4
0.78
10.3
17.4
400
.498
-96.3
2.956
102.1
.069
52.3
.756
-19.9
0.89
9.4
16.3
500
.423
-113.8
2.607
92.2
.076
52.4
.738
-21.8
0.99
8.3
15.4
600
.382
-126.3
2.273
84.7
.084
53.1
.728
-23.7
1.06
7.1
12.8
700
.355
-136.7
2.013
78.4
.091
54.1
.721
-25.7
1.13
6.1
11.3
800
.338
-145.4
1.803
72.9
.099
54.6
.717
-28.0
1.17
5.1
10.1
900
.327
-152.6
1.630
68.0
.107
55.3
.713
-30.2
1.21
4.2
9.1
1000
.318
-159.5
1.490
63.5
.115
56.0
.710
-32.6
1.22
3.5
8.2
1500
.308
172.6
1.071
45.4
.157
58.2
.704
-43.9
1.25
0.6
5.4
2000
.315
148.6
0.851
31.3
.201
58.7
.702
-56.4
1.20
-1.4
3.7
2500
.340
125.9
0.710
21.1
.257
58.2
.691
-69.1
1.14
-3.0
2.1
3000
.379
105.4
0.614
14.8
.326
55.2
.670
-82.8
1.11
-4.2
0.8
50
.819
-19.8
7.561
154.4
.014
88.3
.946
-8.5
0.20
17.6
27.3
100
.740
-38.0
6.980
138.9
.025
63.8
.874
-13.2
0.57
16.9
24.5
200
.511
-76.6
5.906
117.4
.037
59.4
.771
-15.6
0.77
15.4
22.0
300
.414
-106.3
4.762
101.6
.046
58.2
.732
-16.4
0.92
13.6
20.2
400
.354
-125.6
3.819
91.5
.052
59.9
.713
-17.5
1.07
11.6
17.0
500
.326
-138.4
3.152
84.3
.064
60.3
.705
-19.2
1.09
10.0
15.1
600
.313
-147.8
2.671
78.4
.072
61.7
.701
-21.1
1.15
8.5
13.3
700
.306
-155.6
2.318
73.3
.081
62.4
.699
-23.2
1.18
7.3
12.0
800
.303
-162.1
2.050
68.7
.089
62.7
.697
-25.4
1.21
6.2
10.8
900
.302
-167.8
1.839
64.4
.098
63.2
.696
-27.7
1.22
5.3
9.9
1000
.303 -173.3
1.669
60.4
.106
63.5
.695
-30.1
1.24
4.4
9.0
1500
.316
163.0
1.169
43.8
.151
64.6
.696
-41.4
1.19
1.4
6.3
2000
.333
141.1
0.914
30.2
.198
64.3
.699
-53.8
1.12
-0.8
4.6
2500
.361
119.9
0.751
20.2
.259
62.8
.691
-66.3
1.05
-2.5
3.3
3000
.401
100.9
0.642
13.9
.332
58.7
.672
-79.9
1.02
-3.8
2.0
V
CE
= 3 V, I
CE
= 5 mA
MAG =
|S
21
|
|S
12
|
K - 1
).
2
(
K
= S
11
S
22
- S
21
S
12
When K
1, MAG is undefined and MSG values are used. MSG =
|S
21
|
|S
12
|
, K = 1 + |
| - |S
11
| - |S
22
|
2
2
2
2 |S
12
S
21
|
,
Note:
1. Gain Calculations:
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
NE944 SERIES
j50
j25
j10
0
-j10
-j25
-j50
-j100
j100
0
10
25
50
100
S
22
.05 GHz
S
22
3 GHz
S
11
.05 GHz
S
11
3 GHz
120
90
60
30
150
180
-150
-120
-90
-60
-30
0
.5
5
4
3
.4
.3
S
21
0.5 GHz
S
12
3 GHz
S
21
3 GHz
2
S
12
0.5 GHz
1
.2
TYPICAL COMMON EMITTER SCATTERING PARAMETERS
(T
A
= 25
C)
Coordinates in Ohms
Frequency in GHz
(V
CE
= 3 V, I
C
= 10 mA)
NE94430
V
CE
= 3 V, I
C
= 10 mA
FREQUENCY
S
11
S
21
S
12
S
22
K
S
21
MAG
(MHz)
MAG
ANG
MAG
ANG
MAG
ANG
MAG
ANG
(dB)
(dB)
50
.585
-42.0
12.113
141.5
.010
70.5
.896
-11.0
0.64
21.7
30.8
100
.496
-76.7
10.005
124.0
.015
60.1
.799
-13.5
0.95
20.0
28.2
200
.354
-119.1
6.964
102.0
.028
63.7
.721
-13.4
1.05
16.9
22.5
300
.320
-138.2
5.042
91.6
.039
65.1
.702
-14.0
1.12
14.0
19.1
400
.313
-150.2
3.910
84.5
.049
66.7
.693
-15.4
1.16
11.8
16.6
500
.310
-158.3
3.184
78.7
.058
66.7
.690
-17.3
1.21
10.1
14.6
600
.313
-164.8
2.680
73.6
.067
67.6
.689
-19.5
1.23
8.6
13.1
700
.317
-170.5
2.316
69.1
.076
68.2
.689
-21.8
1.24
7.3
11.9
800
.322
-175.4
2.040
64.8
.084
68.2
.689
-24.2
1.26
6.2
10.8
900
.326
-179.9
1.824
60.8
.093
68.6
.690
-26.6
1.26
5.2
9.9
1000
.330
175.5
1.652
57.1
.101
68.7
.690
-29.1
1.27
4.4
9.0
1500
.354
154.6
1.145
41.2
.148
70.1
.694
-41.0
1.18
1.2
6.3
2000
.374
134.2
0.887
28.1
.202
69.0
.697
-53.8
1.07
-1.0
4.8
2500
.402
114.4
0.722
18.6
.269
66.2
.689
-66.7
1.01
-2.8
3.7
3000
.438
96.2
0.613
13.2
.347
60.7
.668
-80.6
1.01
-4.3
2.1
V
CE
= 10 V, Ic = 5 mA
50
.860
-17.7
7.577
156.2
.012
79.9
.960
-6.1
0.30
17.6
28.0
100
.788
-35.1
6.982
141.8
.021
60.9
.909
-10.2
0.57
16.9
25.2
200
.574
-68.0
6.049
120.3
.033
60.0
.826
-12.6
0.71
15.6
22.6
300
.428
-95.6
4.966
104.4
.039
59.9
.792
-13.6
0.86
13.9
21.0
400
.349
-114.9
4.020
93.9
.045
61.9
.776
-14.7
0.98
12.1
19.5
500
.312
-127.9
3.329
86.6
.053
62.5
.768
-16.3
1.04
10.4
16.7
600
.293
-138.0
2.823
80.7
.060
63.9
.765
-18.1
1.09
9.0
14.9
700
.282
-146.3
2.450
75.6
.067
64.5
.763
-19.9
1.13
7.8
13.5
800
.277
-153.6
2.165
70.9
.074
65.0
.762
-22.0
1.15
6.7
12.3
900
.274
-159.8
1.941
66.7
.082
66.0
.761
-24.0
1.15
5.8
11.4
1000
.273
-165.8
1.759
62.8
.088
66.3
.760
-26.1
1.18
4.9
10.4
1500
.283
168.0
1.223
46.3
.126
68.6
.763
-36.0
1.12
1.7
7.8
2000
.301
144.3
0.949
32.5
.167
69.7
.768
-46.8
1.03
-0.5
6.6
2500
.334
121.7
0.772
22.0
.221
69.6
.766
-57.6
0.93
-2.2
5.4
3000
.380
101.5
0.649
15.0
.290
66.7
.755
-69.3
0.87
-3.8
3.5
NE944 SERIES
j50
j25
j10
0
-j10
-j25
-j50
-j100
j100
0
10
25
50
100
S
22
3 GHz
S
11
.05 GHz
S
11
3 GHz
S
22
.05 GHz
120
90
60
30
150
180
-150
-120
-90
-60
-30
0
.5
.4
.3
14
12
10
8
.2
.1
S
12
0.5 GHz
S
12
3 GHz
S
21
3 GHz
S
21
0.5 GHz
Note:
1. Gain Calculations:
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
MAG =
|S
21
|
|S
12
|
K - 1
).
2
(
K
= S
11
S
22
- S
21
S
12
When K
1, MAG is undefined and MSG values are used. MSG =
|S
21
|
|S
12
|
, K = 1 + |
| - |S
11
| - |S
22
|
2
2
2
2 |S
12
S
21
|
,
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