UPA806T
NPN SILICON HIGH
FREQUENCY TRANSISTOR
SILICON TRANSISTOR
•SMALL PACKAGE STYLE:
2 NE685 Die in a 2 mm x 1.25 mm package
•LOW NOISE FIGURE:
NF = 1.5 dB TYP at 2 GHz
•HIGH GAIN:
|S21E|2 = 8.5 dB TYP at 2 GHz
•HIGH GAIN BANDWIDTH: fT = 12 GHz
•EXCELLENT LOW VOLTAGE, LOW CURRENT
PERFORMANCE
FEATURES OUTLINE DIMENSIONS (Units in mm)
PACKAGE OUTLINE S06
(Top View)
DESCRIPTION
The UPA806T is two NPN high frequency silicon epitaxial
transistors encapsulated in an ultra small 6 pin SMT package.
Each transistor is independently mounted and easily config-
ured for either dual transistor or cascode operation. The high
fT, low voltage bias and small size make this device suited for
various hand-held wireless applications.
T608APUREBMUN TRAP
60SENILTUO EGAKCAP
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
ICBO Collector Cutoff Current at VCB = 5 V, IE = 0 μ1.0A
IEBO Emitter Cutoff Current at VEB = 1 V, IC = 0 μ1.0A
hFE1Forward Current Gain at VCE = 3 V, IC05100157Am 01 =
fTGain Bandwidth at VCE = 3 V, IC 21zHGzHG 2 = f ,Am 01 =
Cre2Feedback Capacitance at VCB = 3 V, IE7.04.0FpzHM 1 = f ,0 =
|S21E|2Insertion Power Gain at VCE = 3 V, IC = 10 mA, f = 2 GHz dB 7 8.5
NF Noise Figure at VCE = 3 V, IC 5.25.1BdzHG 2 = f ,Am 3 =
hFE1/hFE2 hFE 58.0:oitaR
ELECTRICAL CHARACTERISTICS (TA = 25°C)
Notes: 1. Pulsed measurement, pulse width ≤ 350 μs, duty cycle ≤ 2 %.
2. The emitter terminal should be connected to the ground terminal of the 3 terminal capacitance bridge.
For Tape and Reel version use part number UPA806T-T1, 3K per reel.
Note:
Pin 3 is identified with a circle on the bottom of the package.
PIN OUT
1. Collector Transistor 1
2. Emitter Transistor 1
3. Collector Transistor 2
4. Emitter Transistor 2
5. Base Transistor 2
6. Base Transistor 1
hFE1 = Smaller Value of Q1, or Q2
hFE2 = Larger Value of Q1 or Q2
2.1 ± 0.1
1.25 ± 0.1
0 ~ 0.1
0.15
0.9 ± 0.1
0.7
2.0 ± 0.2
0.65
1.3
1
2
34
5
6
0.2 (All Leads)
+0.10
- 0.05
ABSOLUTE MAXIMUM RATINGS1 (TA = 25°C)
Note: 1. Operation in excess of any one of these parameters
may result in permanent damage.
SYMBOLS PARAMETERS UNITS RATINGS
VCBO Collector to Base Voltage V 9
VCEO Collector to Emitter Voltage V 6
VEBO Emitter to Base Voltage V 2
ICCollector Current mA 30
PT Total Power Dissipation
1 Die mW 110
2 Die mW 200
TJJunction Temperature °C 150
TSTG Storage Temperature °C -65 to +150
PART NUMBER QUANTITY PACKAGING
UPA806T-T1-A 3000 Tape & Reel
ORDERING INFORMATION
UPA806T
INSERTION POWER GAIN vs.
COLLECTOR CURRENT
Insertion Power Gain,
|S
21E
|
2
(dB)
Collector Current, lc (mA)
NOISE FIGURE vs.
COLLECTOR CURRENT
Noise Figure, NF
(dB)
Collector Current, lc (mA)
Q1
10
8
6
4
2
2 5 10 20 500.5
f = 2 GHz
5 V
3 V
V
CE
= 1 V
4
3
2
1
0
12 51020 500.5
V
CE
= 3 V
f = 2 GHz
COLLECTOR CURRENT vs.
COLLECTOR TO EMITTER VOLTAGE
Collector Current, lc
(mA)
Collector to Emitter Voltage, VCE (V)
DC CURRENT GAIN vs.
COLLECTOR CURRENT
DC Current Gain, h
FE
Collector Current, lc (mA)
60
50
40
30
20
10
0123456
500 µA
400 µA
300 µA
200 µA
l
B
=100 µA
200
100
0
12 51020 500.1 0.2 0.5 100
5 V
VCE = 3 V
TYPICAL PERFORMANCE CURVES
FEEDBACK CAPACITANCE vs.
COLLECTOR TO BASE VOLTAGE
Feedback Capacitance, C
re
(pF)
0.6
0.5
0.4
0.3
0.2
12 510200.5
f = 1 MHz
GAIN BANDWIDTH PRODUCT vs.
COLLECTOR CURRENT
Gain Bandwidth Product, f
T
(GHz)
14
12
10
8
6
4
2
12 5 1020 500.5
5 V
3 V
f = 2 GHz
VCE = 1 V
Collector Current, lc (mA)
Total Power Dissipation, P
T
(mW)
Ambient Temperature, TA (°C)
COLLECTOR CURRENT vs.
BASE TO EMITTER VOLTAGE
Collector Current, lc
(mA)
Base to Emitter Voltage, VBE (V)
TOTAL POWER DISSIPATION vs.
AMBIENT TEMPERATURE
200
100
0 50 100 150
Free Air
2 elements in total
Q1 when using 1 element
Q1 when using
2 elements
50
40
30
20
10
0 0.5 1.0
VCE = 3 V
Collector to Base Voltage, VCB (V)
TYPICAL PERFORMANCE CURVES
UPA806T
UPA806T
TYPICAL SCATTERING PARAMETERS (TA = 25°C)
UPA806T(Q1)
VCE = 1 V, IC = 1 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.893 -33.80 2.828 145.80 0.098 67.30 0.933 -20.90 0.218 14.603
0.60 0.846 -40.80 2.750 139.10 0.116 62.10 0.911 -24.50 0.282 13.749
0.80 0.766 -53.80 2.615 127.20 0.145 54.30 0.867 -31.20 0.365 12.561
1.00 0.693 -65.70 2.486 116.60 0.169 47.80 0.823 -37.40 0.435 11.676
1.20 0.624 -76.80 2.354 106.90 0.187 42.10 0.778 -43.20 0.502 11.000
1.40 0.558 -87.70 2.221 97.90 0.201 37.10 0.735 -48.70 0.568 10.434
1.60 0.498 -98.60 2.093 89.40 0.212 32.70 0.694 -53.90 0.633 9.944
1.80 0.445 -109.60 1.973 81.30 0.220 28.90 0.656 -58.90 0.699 9.527
2.00 0.400 -120.50 1.865 73.90 0.226 25.70 0.621 -63.60 0.764 9.166
2.20 0.362 -131.30 1.766 67.00 0.229 23.20 0.591 -68.00 0.830 8.872
2.40 0.329 -142.00 1.677 60.90 0.232 21.30 0.565 -72.00 0.893 8.590
2.60 0.301 -152.90 1.593 55.30 0.233 20.00 0.542 -75.80 0.960 8.349
2.80 0.279 -165.00 1.515 50.10 0.234 18.90 0.523 -79.30 1.022 7.202
3.00 0.268 -179.10 1.445 44.80 0.235 18.10 0.506 -82.70 1.076 6.207
UPA806T(Q2)
VCE = 1 V, IC = 1 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.899 -34.10 2.832 145.80 0.090 66.90 0.937 -20.70 0.210 14.979
0.60 0.856 -41.10 2.755 139.20 0.106 61.70 0.916 -24.20 0.272 14.148
0.80 0.783 -54.00 2.622 127.40 0.134 53.60 0.873 -30.80 0.357 12.915
1.00 0.717 -65.70 2.495 116.80 0.155 47.10 0.831 -36.90 0.424 12.067
1.20 0.655 -76.60 2.367 107.10 0.172 41.30 0.789 -42.60 0.490 11.387
1.40 0.595 -87.00 2.239 98.00 0.185 36.10 0.747 -48.00 0.559 10.829
1.60 0.540 -97.20 2.116 89.50 0.196 31.60 0.707 -53.10 0.625 10.333
1.80 0.490 -107.20 2.001 81.40 0.204 27.60 0.670 -58.10 0.692 9.916
2.00 0.447 -116.90 1.898 73.80 0.210 24.20 0.635 -62.80 0.760 9.561
2.20 0.408 -126.30 1.804 66.80 0.215 21.50 0.604 -67.40 0.825 9.238
2.40 0.372 -135.40 1.719 60.40 0.218 19.20 0.577 -71.70 0.893 8.968
2.60 0.339 -144.60 1.640 54.50 0.220 17.50 0.552 -75.90 0.962 8.724
2.80 0.311 -154.90 1.565 48.90 0.221 16.00 0.531 -80.00 1.028 7.467
3.00 0.290 -167.50 1.497 43.20 0.223 14.60 0.511 -84.00 1.087 6.474
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
Note:
1. Gain Calculation:
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
|
222
2 |S
12
S
21
|
,
UPA806T
TYPICAL SCATTERING PARAMETERS (TA = 25°C)
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
UPA806T(Q1)
VCE = 2 V, IC = 5 mA
0.50 0.537 -62.90 8.804 121.00 0.064 60.90 0.710 -34.60 0.533 21.385
0.60 0.464 -68.80 7.894 115.70 0.071 59.00 0.664 -36.80 0.617 20.460
0.80 0.351 -81.80 6.511 105.20 0.085 56.60 0.587 -40.90 0.744 18.842
1.00 0.272 -95.90 5.539 95.50 0.097 55.20 0.529 -44.70 0.837 17.567
1.20 0.216 -110.40 4.820 87.10 0.110 54.10 0.485 -48.20 0.901 16.417
1.40 0.176 -125.30 4.250 80.20 0.123 53.20 0.451 -51.40 0.949 15.385
1.60 0.146 -140.60 3.778 74.60 0.135 52.40 0.425 -54.30 0.992 14.469
1.80 0.124 -156.90 3.381 69.80 0.148 51.40 0.404 -57.20 1.028 12.563
2.00 0.112 -174.00 3.055 65.40 0.161 50.40 0.387 -60.00 1.057 11.326
2.20 0.109 169.30 2.800 61.00 0.174 49.20 0.372 -63.00 1.077 10.374
2.40 0.113 154.50 2.612 56.40 0.187 47.90 0.360 -66.20 1.085 9.676
2.60 0.124 142.00 2.477 51.70 0.201 46.50 0.349 -69.70 1.078 9.199
2.80 0.140 131.40 2.371 47.00 0.214 44.90 0.339 -73.40 1.069 8.836
3.00 0.162 121.50 2.249 42.80 0.226 43.20 0.329 -77.10 1.069 8.380
UPA806T(Q2)
VCE = 2 V, IC = 5 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.562 -61.50 8.997 121.90 0.059 60.70 0.729 -33.10 0.516 21.832
0.60 0.491 -67.40 8.086 116.40 0.066 58.50 0.683 -35.20 0.602 20.882
0.80 0.383 -80.00 6.704 105.60 0.078 55.70 0.608 -39.20 0.733 19.342
1.00 0.307 -92.90 5.732 95.60 0.089 54.00 0.550 -42.80 0.830 18.089
1.20 0.253 -105.30 5.008 87.10 0.101 52.70 0.506 -46.00 0.895 16.953
1.40 0.212 -117.00 4.429 79.90 0.112 51.70 0.472 -48.90 0.950 15.971
1.60 0.179 -128.10 3.945 74.00 0.124 50.70 0.445 -51.40 0.993 15.026
1.80 0.153 -139.00 3.536 68.90 0.136 49.60 0.423 -53.90 1.031 13.065
2.00 0.132 -150.50 3.200 64.20 0.148 48.40 0.404 -56.50 1.064 11.801
2.20 0.118 -162.90 2.937 59.50 0.160 47.10 0.388 -59.30 1.087 10.839
2.40 0.111 -176.20 2.744 54.60 0.173 45.70 0.374 -62.40 1.093 10.141
2.60 0.110 169.90 2.608 49.60 0.185 44.00 0.361 -65.80 1.093 9.637
2.80 0.115 155.50 2.501 44.80 0.198 42.30 0.348 -69.50 1.083 9.254
3.00 0.127 140.60 2.376 40.20 0.210 40.30 0.336 -73.40 1.083 8.783
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
Note:
1. Gain Calculation:
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
|
222
2 |S
12
S
21
|,
UPA806T
TYPICAL SCATTERING PARAMETERS (TA = 25°C)
UPA806T(Q1)
VCE = 2 V, IC = 10 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.323 -79.50 10.650 109.10 0.054 63.40 0.567 -37.90 0.754 22.950
0.60 0.270 -85.10 9.383 105.00 0.061 63.30 0.532 -38.90 0.812 21.870
0.80 0.190 -99.30 7.445 96.40 0.074 62.90 0.473 -41.00 0.910 20.026
1.00 0.137 -118.00 6.111 88.00 0.089 62.30 0.430 -43.40 0.968 18.367
1.20 0.107 -140.80 5.181 80.50 0.103 61.40 0.398 -46.10 1.010 16.405
1.40 0.095 -164.50 4.507 74.50 0.118 60.30 0.374 -48.90 1.032 14.716
1.60 0.093 174.40 3.991 69.90 0.133 59.00 0.357 -51.80 1.047 13.443
1.80 0.096 157.30 3.581 66.10 0.148 57.50 0.343 -54.80 1.059 12.352
2.00 0.103 143.70 3.247 62.70 0.162 55.90 0.332 -57.90 1.071 11.392
2.20 0.113 132.80 2.977 58.90 0.177 54.20 0.322 -61.10 1.076 10.577
2.40 0.125 124.10 2.763 54.50 0.192 52.30 0.312 -64.50 1.076 9.896
2.60 0.141 116.90 2.597 49.50 0.206 50.40 0.302 -68.20 1.073 9.353
2.80 0.159 110.80 2.465 44.30 0.221 48.40 0.293 -72.20 1.063 8.942
3.00 0.181 105.10 2.330 40.10 0.234 46.40 0.284 -76.40 1.061 8.476
UPA806T(Q2)
VCE = 2 V, IC = 10 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.348 -77.00 11.024 109.80 0.050 62.90 0.590 -36.20 0.739 23.434
0.60 0.297 -82.40 9.724 105.50 0.056 62.50 0.554 -37.10 0.803 22.397
0.80 0.218 -95.00 7.740 96.50 0.068 61.80 0.495 -39.10 0.905 20.562
1.00 0.165 -110.00 6.376 87.80 0.081 61.00 0.451 -41.20 0.971 18.961
1.20 0.131 -126.30 5.424 80.10 0.095 60.00 0.419 -43.40 1.009 16.991
1.40 0.111 -142.60 4.728 73.90 0.108 58.80 0.395 -45.70 1.037 15.227
1.60 0.098 -158.20 4.192 68.90 0.122 57.40 0.377 -48.10 1.054 13.945
1.80 0.090 -172.90 3.761 64.90 0.135 55.80 0.363 -50.60 1.071 12.828
2.00 0.086 173.10 3.411 61.20 0.149 54.10 0.350 -53.20 1.081 11.860
2.20 0.086 159.80 3.129 57.10 0.163 52.20 0.338 -56.10 1.088 11.023
2.40 0.091 147.40 2.909 52.40 0.177 50.20 0.326 -59.20 1.089 10.335
2.60 0.101 136.10 2.743 47.10 0.191 48.10 0.314 -62.70 1.084 9.804
2.80 0.115 126.00 2.611 41.80 0.205 45.90 0.302 -66.50 1.075 9.382
3.00 0.134 116.50 2.474 37.20 0.218 43.60 0.291 -70.70 1.071 8.922
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
Note:
1. Gain Calculation:
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
|
222
2 |S
12
S
21
|
,
UPA806T
TYPICAL SCATTERING PARAMETERS (TA = 25°C)
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
UPA806T(Q1)
VCE = 3 V, IC = 10 mA
0.50 0.337 -74.20 10.935 110.20 0.052 64.10 0.589 -35.80 0.744 23.228
0.60 0.283 -79.00 9.644 106.00 0.058 64.00 0.554 -36.70 0.807 22.208
0.80 0.198 -90.80 7.669 97.40 0.072 63.60 0.496 -38.80 0.898 20.274
1.00 0.139 -106.30 6.308 88.90 0.086 62.90 0.453 -41.10 0.959 18.654
1.20 0.101 -126.10 5.356 81.50 0.100 62.00 0.421 -43.70 0.999 17.288
1.40 0.080 -149.80 4.662 75.50 0.114 60.90 0.398 -46.30 1.024 15.163
1.60 0.071 -174.60 4.129 70.90 0.128 59.70 0.381 -49.10 1.042 13.832
1.80 0.072 163.30 3.704 67.10 0.143 58.30 0.367 -52.00 1.052 12.741
2.00 0.077 145.60 3.358 63.70 0.157 56.70 0.356 -54.90 1.063 11.767
2.20 0.087 132.20 3.078 60.00 0.172 55.10 0.346 -58.00 1.067 10.946
2.40 0.100 122.10 2.857 55.70 0.186 53.30 0.336 -61.20 1.070 10.253
2.60 0.115 114.40 2.687 50.70 0.200 51.40 0.327 -64.70 1.066 9.717
2.80 0.135 108.10 2.550 45.60 0.214 49.50 0.318 -68.40 1.057 9.301
3.00 0.157 102.50 2.411 41.50 0.227 47.50 0.309 -72.30 1.054 8.834
UPA806T(Q2)
VCE = 3 V, IC = 10 mA
FREQUENCY S11 S21 S12 S22 K Gmag
(GHz) MAG ANG MAG ANG MAG ANG MAG ANG (dB)
0.50 0.364 -71.90 11.322 111.00 0.047 63.60 0.613 -34.10 0.734 23.818
0.60 0.311 -76.60 9.999 106.60 0.053 63.20 0.578 -35.00 0.797 22.757
0.80 0.228 -87.40 7.979 97.60 0.066 62.50 0.520 -36.90 0.891 20.824
1.00 0.170 -99.80 6.588 88.80 0.078 61.70 0.477 -39.00 0.960 19.267
1.20 0.131 -113.50 5.613 81.20 0.091 60.70 0.445 -41.10 1.001 17.712
1.40 0.105 -127.60 4.897 74.90 0.104 59.50 0.422 -43.30 1.027 15.721
1.60 0.086 -141.90 4.341 70.00 0.117 58.20 0.404 -45.70 1.047 14.372
1.80 0.073 -156.70 3.895 66.00 0.130 56.60 0.390 -48.10 1.062 13.244
2.00 0.065 -172.60 3.531 62.30 0.143 55.00 0.378 -50.60 1.074 12.260
2.20 0.063 170.60 3.239 58.30 0.157 53.20 0.367 -53.40 1.079 11.433
2.40 0.065 154.00 3.012 53.60 0.171 51.20 0.355 -56.40 1.079 10.738
2.60 0.074 139.20 2.841 48.40 0.184 49.20 0.344 -59.70 1.076 10.205
2.80 0.088 126.60 2.705 43.10 0.197 47.00 0.333 -63.30 1.068 9.784
3.00 0.107 115.70 2.563 38.60 0.210 44.80 0.322 -67.30 1.064 9.320
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
Note:
1. Gain Calculation:
MAG = |S21|
|S12|K - 1 ).
2
(K ± ∆ = S11 S22 - S21 S12
When K ≤ 1, MAG is undefined and MSG values are used. MSG = |S21|
|S12|, K = 1 + | ∆ | - |S11| - |S22|
222
2 |S12 S21|,
(1) Gummel-Poon Model
Parameters Q1 & Q2 Parameters Q1 & Q2
IS 7e-16 MJC 0.34
BF 109 XCJC 0
NF 1 CJS 0
VAF 15 VJS 0.75
IKF 0.19 MJS 0
ISE 7.9e-13 FC 0.5
NE 2.19 TF 3e-12
BR 1 XTF 5.2
NR 1.08 VTF 4.58
VAR 12.4 ITF 0.01
IKR Infinity PTF 0
ISC 0 TR 1e-9
NC 2 EG 1.11
RE 1.3 XTB 0
RB 10 XTI 3
RBM 8.34 KF 0
IRB 0.009 AF 1
RC 10
CJE 0.4e-12
VJE 0.81
MJE 0.5
CJC 0.18e-12
VJC 0.75
BJT NONLINEAR MODEL PARAMETERS(1) UNITS
Parameter Units
time seconds
capacitance farads
inductance henries
resistance ohms
voltage volts
current amps
MODEL RANGE
Frequency: 0.1 to 3.0 GHz
Bias: VCE =0.5 V to 5 V, IC = 1 mA to 10 mA
Date: 10/98
NONLINEAR MODEL
UPA806T
Note:
This nonlinear model utilized the latest data available. See our Design Parameter Library at www.cel.com for this data.
NONLINEAR MODEL
SCHEMATIC
MODEL RANGE
Frequency: 0.1 to 3.0 GHz
Bias: VCE = 0.5 V to 5 V, IC = 1 mA to 10 mA
Date: 10/98
UPA806T
Pin_1
Pin_2
Pin_3 Pin_4
Pin_5
Pin_6
0.07 pF
CCEPKG2
CCBPKG2
0.9 nH
0.14 pF
CCE2
CCB2
0.14 pF
CCE1
0.13 pF
1.1 nH
0.55 nH 0.05 nH
1.0 nH
Q1
Q2
CCBPKG1
CCB1
LE1
BL1BL
0.05 nH
LB
0.05 nH
LE
C_B2E2
0.05 pF
C_B1B2
0.05 pF
LB2
LE2
C_C1B2
0.1 pF
LC
0.05 nH
LC
0.05 nH
LE
0.05 nH
C_E1C2
C_C1E1
0.05 pF
0.05 pF
C_E1B2
0.1 pF
0.1 pF
0.06 pF
0.13 pF
EXCLUSIVE NORTH AMERICAN AGENT FOR RF, MICROWAVE & OPTOELECTRONIC SEMICONDUCTORS
CALIFORNIA EASTERN LABORATORIES • Headquarters • 4590 Patrick Henry Drive • Santa Clara, CA 95054-1817 • (408) 988-3500 • Telex 34-6393 • FAX (408) 988-0279
24-Hour Fax-On-Demand: 800-390-3232 (U.S. and Canada only) • Internet: http://WWW.CEL.COM
PRINTED IN USA ON RECYCLED PAPER -12/98
DATA SUBJECT TO CHANGE WITHOUT NOTICE
