2N2857UB
RF and MICROWAVE DISCRETE
LOW POWER TRANSISTORS
Qualified per MIL-PRF-19500/343
DESCRIPTION
The 2N2857UB is a military qualified silicon NPN transistor (also available in commercial
version), designed for UHF equipment and other high-reliability applications. Common
applications include low noise amplifier; oscillator, and mixer applications. Microsemi also
offers numerous other products to meet higher and lower power voltage regulation
applications.
Available on
commercial
versions
Qualified Levels:
JAN, JANTX,
and JANTXV
Important:
For the latest information, visit our website
http://www.microsemi.com.
FEATURES
•
•
•
•
•
Surface mount equivalent to JEDEC registered 2N2857.
Silicon NPN, UB packaged UHF transistor.
Maximum unilateral gain = 13 dB (typ) @ 500 MHz.
JAN, JANTX, and JANTXV military qualified versions available per MIL-PRF-19500/343.
RoHS compliant version available (commercial grade only).
UB Package
Also available in:
TO-72 Package
(axial-leaded)
2N2857
APPLICATIONS / BENEFITS
•
•
Low-power, ultra-high frequency transistor.
Low-profile ceramic surface mount package.
MAXIMUM RATINGS
@
T
A
= +25
o
C
Parameters/Test Conditions
Junction and Storage Temperature
Collector-Emitter Voltage
Collector-Base Voltage
Emitter-Base Voltage
Thermal Resistance Junction-to-Ambient
Thermal Resistance Junction-to-Solder Pad
(1)
Steady-State Power Dissipation
Collector Current
Notes:
1. Derate linearly 1.14 mW/°C for T
A
> +25 °C.
Symbol
T
J
and T
STG
V
CEO
V
CBO
V
EBO
R
ӨJA
R
ӨJSP
P
D
I
C
Value
-65 to +200
15
30
3
400
210
200
40
Unit
C
V
V
V
o
C/W
o
C/W
mW
mA
o
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
(978) 620-2600
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Website:
www.microsemi.com
T4-LDS-0223-1, Rev. 1 (120178)
©2011 Microsemi Corporation
Page 1 of 5
2N2857UB
MECHANICAL and PACKAGING
•
•
•
•
•
•
CASE: Ceramic.
TERMINALS: Gold plating over nickel underplate. RoHS compliant matte/tin available on commercial grade only.
MARKING: Part number, date code, manufacturer’s ID.
TAPE & REEL option: Standard per EIA-418D. Consult factory for quantities.
WEIGHT: < 0.04 Grams.
See
Package Dimensions
on last page.
PART NOMENCLATURE
JAN
Reliability Level
JAN=JAN level
JANTX=JAN level
JANTXV=JANTXV level
Blank = Commercial
JEDEC type number
(See
Electrical Characteristics
table)
2N2857
UB
(e3)
RoHS Compliance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Surface Mount package
Symbol
I
C
I
B
T
A
T
C
V
CB
V
EB
Collector current (dc).
Base current (dc).
Ambient or free air temperature.
Case temperature.
Collector to base voltage (dc).
Emitter to base voltage (dc).
SYMBOLS & DEFINITIONS
Definition
T4-LDS-0223-1, Rev. 1 (120178)
©2011 Microsemi Corporation
Page 2 of 5
2N2857UB
ELECTRICAL CHARACTERISTICS
@
T
C
= +25
o
C
OFF CHARACTERISTICS
Test Conditions
Collector-Emitter Breakdown Voltage
(I
C
= 3.0 mA, Bias condition D)
Collector to Emitter Cutoff Current
(V
CE
= 16 V, Bias condition C)
Emitter to Base Cutoff Current
(V
EB
= 3 V, Bias condition D)
Collector to Base Cutoff Current
(V
CB
= 15 V, Bias condition D)
Symbol
V
(BR)CEO
I
CES
I
EBO
I
CBO
Value
Min.
15
-
-
-
Typ.
-
-
-
-
Max.
-
100
10
10
Unit
V
nA
µA
nA
ON CHARACTERISTICS
Test Conditions
Forward Current transfer ratio
(I
C
= 3.0 mA, V
CE
= 1.0 V)
Collector-Emitter Saturation Voltage
(I
C
= 10 mA, I
B
= 1 mA)
Base-Emitter Saturation Voltage
(I
C
= 10 mA, I
B
= 1 mA)
Symbol
h
FE
Value
Min.
30
Typ.
-
-
-
Max.
150
0.4
1.0
V
V
Unit
V
CE(sat)
V
BE(sat)
DYNAMIC CHARACTERISTICS
Test Conditions
Magnitude of common emitter small signal short
circuit forward current transfer ratio
(V
CE
= 6 V, Ic = 5 mA, f = 100 MHz)
Collector-base time constant
(I
E
= 2.0 mA, V
CB
= 6.0 V, f = 31.9 MHz)
Collector to Base – feedback capacitance
(I
E
= 0 mA, V
CB
= 10 V, 100 kHz < f < 1 MHz
Noise Figure (50 Ohms)
(I
C
= 1.5 mA, V
CE
= 6 V, f = 450 MHz, R
g
= 50 Ω)
Small Signal Power Gain (common emitter)
(I
E
= 1.5 mA, V
CE
= 6 V, f = 450 MHz
Symbol
Value
Min.
10
Typ.
-
Max.
21
Unit
|h
fe
|
r
b
’C
c
C
cb
F
G
pe
4
-
15
1.0
pF
pF
dB
4.5
12.5
21
dB
T4-LDS-0223-1, Rev. 1 (120178)
©2011 Microsemi Corporation
Page 3 of 5
2N2857UB
GRAPHS
Theta (
o
CW)
Time (sec)
FIGURE 1
Maximum Thermal Impedance
T4-LDS-0223-1, Rev. 1 (120178)
©2011 Microsemi Corporation
Page 4 of 5
2N2857UB
PACKAGE DIMENSIONS
Symbol
BH
BL
BW
CL
CW
LL1
LL2
Dimensions
inch
millimeters
Min
Max
Min
Max
.046
.056
1.17
1.42
.115
.128
2.92
3.25
.085
.108
2.16
2.74
.128
3.25
.108
2.74
.022
.038
0.56
0.97
.017
.035
0.43
0.89
Note
Symbol
LS1
LS2
LW
r
r1
r2
Dimensions
inch
millimeters
Min
Max
Min
Max
.035
.039
0.89
1.02
.071
.079
1.80
2.01
0.16
0.24
0.41
0.61
.008
0.20
.012
0.31
.022
.056
Note
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for general information only.
3. Hatched areas on package denote metallized areas.
4. Pad 1 = Base, Pad 2 = Emitter, Pad 3 = Collector, Pad 4 = Shielding connected to the lid.
5. In accordance with ASME Y14.5M, diameters are equivalent to Φx symbology.
T4-LDS-0223-1, Rev. 1 (120178)
©2011 Microsemi Corporation
Page 5 of 5
