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DATA SHEET
NPN SILICON RF TWIN TRANSISTOR
µPA821TC
NPN SILICON EPITAXIAL TWIN TRANSISTOR
(WITH BUILT-IN 2 × 2SC5006)
FLAT-LEAD 6-PIN THIN-TYPE ULTRA SUPER MINIMOLD
DESCRIPTION
The µPA821TC has built-in low-voltage two transistors which are designed for low-noise amplification in the VHF to
UHF band.
FEATURES
• Low noise: NF= 1.2 dB TYP.@ f = 1 GHz, VCE = 3 V, IC = 7 mA
• High gain: IS21el2 = 9.0 dB TYP. @ f = 1 GHz, VCE = 3 V, IC = 7 mA
• Flat-lead 6-pin thin-type ultra super minimold package
• Built-in 2 transistors (2 × 2SC5006)
ORDERING INFORMATION
Part Number
Package
µPA821TC
µPA821TC-T1
Flat-lead 6-pin
thin-type ultra
super minimold
Quantity
Loose products
(50 pcs)
Taping products
(3 kp/reel)
Supplying Form
Embossed tape 8 mm wide.
Pin 6 (Q1 Base), Pin 5 (Q2 Emitter), Pin 4 (Q2 Base) face to perforation
side of the tape.
Remark To order evaluation samples, please contact your local NEC sales office. (Part number for sample order:
µPA821TC. Unit sample quantity is 50 pcs).
ABSOLUTE MAXIMUM RATINGS (TA = +25°C)
Parameter
Collector to Base Voltage
Collector to Emitter Voltage
Emitter to Base Voltage
Collector Current
Total Power Dissipation
Junction Temperature
Storage Temperature
Symbol
VCBO
VCEO
VEBO
IC
P Note
T
Tj
Tstg
Ratings
20
12
3
100
200 in 1 element
230 in 2 elements
150
65 to 150
Unit
V
V
V
mA
mW
°C
°C
Note Mounted on 1.08 cm2 × 1.0 mm glass epoxy substrate.
Caution Electro-static sensitive devices.
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. P14552EJ1V0DS00 (1st edition)
Date Published November 1999 N CP(K)
Printed in Japan
©
1999

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µPA821TC
ELECTRICAL CHARACTERISTICS (TA = +25°C)
Parameter
Collector Cutoff Current
Emitter Cutoff Current
DC Current Gain
Gain Bandwidth Product
Feedback Capacitance
Insertion Power Gain
Noise Figure
Symbol
ICBO
IEBO
hFE
fT
Cre
|S21e|2
NF
Conditions
VCB = 10 V, IE = 0
VEB = 1 V, IC = 0
VCE = 3 V, IC = 7 mANote 1
VCE = 3 V, IC = 7 mA, f = 1 GHz
VCB = 3 V, IE = 0, f = 1 MHzNote 2
VCE = 3 V, IC = 7 mA, f = 1 GHz
VCE = 3 V, IC = 7 mA, f = 1 GHz
MIN.
70
3.0
7.0
TYP.
4.5
0.7
9.0
1.2
MAX.
1.0
1.0
140
1.5
2.5
Unit
µA
µA
GHz
pF
dB
dB
Notes 1. Pulse Measurement: PW 350 µs, Duty Cycle 2 %
2. Capacitance between collector and base measured with a capacitance meter (autobalancing bridge
method). Emitter should be connected to the guard pin of capacitance meter.
hFE CLASSIFICATION
Rank
Marking
hFE Value
FB
81
70 to 140
2 Data Sheet P14552EJ1V0DS00

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TYPICAL CHARACTERISTICS (TA = +25 °C)
TOTAL POWER DISSIPATION vs.
AMBIENT TEMPERATURE
2 Elements in total
230
200
Per
Element
Free Air
100
µPA821TC
COLLECTOR CURRENT vs.
DC BASE VOLTAGE
20
VCE = 3 V
10
0
0 50 100 150
Ambient Temperature TA (°C)
COLLECTOR CURRENT vs.
COLLECTOR TO EMITTER VOLTAGE
16
12
8
4
0
0
IB = 160 µ A
IB = 140 µ A
IB = 120 µ A
IB = 100 µ A
IB = 80 µ A
IB = 60 µ A
IB = 40 µ A
IB = 20 µ A
12345
Collector to Emitter Voltage VCE (V)
6
0
0
1 000
0.5
DC Base Voltage VBE (V)
1.0
DC CURRENT GAIN vs.
COLLECTOR CURRENT
VCE = 3 V
100
10
0.1
1 10
Collector Current IC (mA)
100
Data Sheet P14552EJ1V0DS00
3

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7.00
6.00
GAIN BANDWIDTH PRODUCT vs.
COLLECTOR CURRENT
VCE = 3 V
f = 1 GHz
5.00
4.00
3.00
2.00
1.00
0.00
1
10
Collector Current IC (mA)
100
NOISE FIGURE vs. COLLECTOR CURRENT
6.00
VCE = 3 V
5.00 f = 1 GHz
4.00
3.00
2.00
1.00
0.00
1
10
Collector Current IC (mA)
100
0.800
FEEDBACK CAPACITANCE vs.
COLLECTOR TO BASE VOLTAGE
f = 1 MHz
0.600
0.400
0.200
0.000
1
10
Collector to Base Voltage VCB (V)
100
µPA821TC
14.00
12.00
INSERTION POWER GAIN vs.
COLLECTOR CURRENT
VCE = 3 V
f = 1 GHz
10.00
8.00
6.00
4.00
2.00
1
10
Collector Current IC (mA)
100
INSERTION POWER GAIN vs. FREQUENCY
25.0
VCE = 3 V
IC = 7 mA
20.0
15.0
10.0
5.0
0.0
0.1
1.0
Frequency f (GHz)
10.0
4 Data Sheet P14552EJ1V0DS00

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µPA821TC
S-PARAMETER Q1
VCE = 3 V, IC = 1 mA
FREQUENCY
GHz
S11
MAG.
ANG.
0.1
0.941
30.4
0.2
0.913
58.3
0.3
0.872
83.6
0.4
0.847
107.8
0.5
0.807
129.2
0.6
0.786
148.3
0.7
0.773
165.3
0.8
0.763
178.4
0.9
0.753
163.7
1.0
0.748
150.0
1.1
0.749
136.7
1.2
0.740
124.2
1.3
0.748
111.9
1.4
0.748
100.6
1.5
0.756
89.6
1.6
0.757
78.6
1.7
0.762
68.6
1.8
0.765
58.2
1.9
0.770
48.6
2.0
0.773
38.7
2.1
0.779
29.2
2.2
0.776
20.0
2.3
0.786
11.4
2.4
0.788
2.0
2.5
0.791
6.5
2.6
0.795
15.0
2.7
0.797
23.6
2.8
0.797
31.2
2.9
0.801
39.3
3.0
0.810
47.0
VCE = 3 V, IC = 3 mA
FREQUENCY
GHz
S11
MAG.
ANG.
0.1
0.869
42.8
0.2
0.794
78.9
0.3
0.737
108.3
0.4
0.695
133.8
0.5
0.669
154.6
0.6
0.652
172.5
0.7
0.641
172.0
0.8
0.636
157.8
0.9
0.634
144.5
1.0
0.634
132.1
1.1
0.637
120.4
1.2
0.638
108.9
1.3
0.643
98.6
1.4
0.647
88.3
1.5
0.654
78.3
1.6
0.659
68.6
1.7
0.665
59.2
1.8
0.673
49.7
1.9
0.679
40.8
2.0
0.684
31.6
2.1
0.689
23.0
2.2
0.695
14.5
2.3
0.704
6.1
2.4
0.709
2.2
2.5
0.713
10.4
2.6
0.720
18.4
2.7
0.725
26.6
2.8
0.734
34.4
2.9
0.737
42.2
3.0
0.744
49.8
S21
MAG.
ANG.
3.863
3.499
3.156
2.833
2.549
2.281
2.069
1.880
1.726
1.597
1.479
1.378
1.291
1.216
1.147
1.079
1.025
0.973
0.928
0.882
0.841
0.801
0.767
0.736
0.705
0.677
0.651
0.624
0.602
0.578
157.1
136.9
118.9
101.5
85.9
71.5
58.3
45.8
33.9
22.5
11.6
1.1
9.2
19.3
29.1
38.8
48.1
57.4
66.3
75.2
83.8
92.6
100.7
109.0
116.8
124.7
132.0
139.8
147.3
154.6
S21
MAG.
ANG.
9.904
8.266
6.914
5.786
4.961
4.274
3.789
3.375
3.030
2.760
2.538
2.341
2.178
2.036
1.917
1.804
1.700
1.615
1.533
1.458
1.393
1.329
1.274
1.220
1.172
1.130
1.083
1.040
1.010
0.974
149.2
125.9
106.6
89.7
75.5
62.6
50.9
39.8
29.4
19.2
9.3
0.1
9.4
18.6
27.9
36.9
45.7
54.7
63.1
71.8
80.2
88.7
96.8
105.1
112.9
121.0
128.8
136.8
144.4
152.1
S12
MAG.
ANG.
0.058
0.079
0.103
0.125
0.130
0.142
0.146
0.150
0.149
0.146
0.144
0.141
0.135
0.127
0.124
0.118
0.110
0.105
0.102
0.100
0.098
0.097
0.097
0.102
0.111
0.119
0.131
0.139
0.146
0.152
64.5
52.1
35.2
20.1
8.6
4.6
15.7
25.2
33.2
42.0
49.9
57.4
64.1
71.9
77.6
81.3
86.0
88.5
92.8
93.1
95.6
95.0
95.6
96.1
97.8
99.7
102.7
108.3
113.9
117.5
S12
MAG.
ANG.
0.038
0.070
0.088
0.087
0.103
0.101
0.103
0.108
0.110
0.108
0.111
0.114
0.116
0.114
0.118
0.120
0.123
0.127
0.130
0.137
0.140
0.146
0.152
0.157
0.165
0.173
0.181
0.189
0.197
0.206
52.2
45.7
30.5
16.2
5.7
0.4
10.3
14.9
22.1
26.9
31.4
36.6
40.6
45.4
49.6
54.4
58.0
62.5
67.3
70.3
75.8
79.9
85.2
89.9
94.8
99.8
105.7
111.1
116.8
121.9
S22
MAG.
ANG.
0.997
0.947
0.898
0.845
0.793
0.755
0.718
0.693
0.673
0.656
0.644
0.633
0.623
0.614
0.608
0.602
0.597
0.594
0.593
0.587
0.584
0.580
0.577
0.577
0.574
0.577
0.573
0.573
0.572
0.582
13.0
25.8
37.2
47.7
56.4
64.9
72.9
81.2
88.6
96.4
104.8
112.6
120.4
128.6
137.1
145.6
154.5
163.3
172.3
178.7
169.7
160.0
150.3
140.6
130.5
120.4
110.3
100.1
90.3
80.2
S22
MAG.
ANG.
0.945
0.819
0.711
0.623
0.553
0.506
0.470
0.440
0.417
0.397
0.386
0.372
0.362
0.350
0.343
0.335
0.330
0.325
0.319
0.318
0.313
0.308
0.306
0.305
0.299
0.304
0.307
0.308
0.309
0.317
21.8
38.9
52.4
62.4
71.2
78.2
85.7
92.3
99.5
106.7
114.0
121.6
129.4
136.6
145.7
153.7
162.4
171.0
179.7
170.8
161.6
151.7
141.8
132.4
121.2
110.7
100.5
90.0
79.6
68.9
Data Sheet P14552EJ1V0DS00
5