UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
DESCRIPTION
The UM4300 and UM7300 series combine a diode chip of extremely thick intrinsic
region with a low thermal resistance construction. This results in diodes uniquely
applicable to very low distortion linear attenuators and specialized functions. The
UM4300 series, with large cross-sectional chip area offers the highest power
capability, of the two series. The UM7300 series offers lower capacitance. Both
diode series are intended for use in linear attenuators operating from HF to
beyond 1 GHz. Low distortion is a result of transit time frequencies below 5 MHz.
Operated as RF switches, either diode series can be operated at low dc reverse
bias voltages, to hold off much higher RF voltage levels.
KEY FEATURES
Extremely low distortion performance
Useful frequency range extends below
500 kHz
Power dissipation to 20 W (UM4300)
Capacitance as low as 0.7 pF
(UM7300)
Voltage ratings to 1000V
Non cavity design
Thermally matched
Isolated stud package available
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.
Microsemi
.
C O M
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
UM4300
Pkg
A
B&E
C
D
SM
ALL
UM7300
Condition
25 °C Pin Temperature
½ in. total length to 25 °C
Contact Free Air
25 °C Stud Temperature
25 °C Stud Temperature
25 °C End Cap Temperature
1 us pulse (Single)
P
D
(W)
θ
(°C/W)
P
D
(W)
θ
(°C/W)
20
10
2.5
20
15
15
7.5
15
7.5
10
20
500 kW
7.5
4
7.5
6
5.5
20
37.5
20
25
18
100 kW
APPLICATIONS / BENEFITS
RF Switching
RF Attenuators
Pick and Place compatible
Surface Mount Versions
RoHS compliant packaging available:
use UMX4301SM, etc
1
VOLTAGE RATINGS
Reverse Voltage @ 10uA
100
200
600
1000
Part Number
UM4301
UM4302
UM4306
UM4310
UM7301
UM7302
UM7306
UM7310
UM4300 / UM7300
UM4300 / UM7300
IMPORTANT:
For the most current data consult
MICROSEMI’s
website:
www.MICROSEMI.com
1 - RoHS compliant versions of the UM4300 and
UM7300 are available. Specify UMX4300 or UMX7300
for RoHS version. Consult factory for details.
Copyright 2005
Rev: 3/30/2009
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page 1
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
THERMAL IMP. VS PULSE WIDTH
PULSE THERMAL IMPEDANCE ( C/W)
102
NORMALIZED RS VS TEMP.
1.3
o
10
1
NORMALIZED DIODE RESISTANCE
1.2
10
0
UM4300
1.1
UM7300
10-1
1.0
0.9
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Microsemi
.
C O M
10-2
0.8
-3
10
10
-6
10
-5
10
-4
10
-3
10
-2
-1
10
0
10
0.7
-60
-40
-20
0
20
40
o
60
80
100
120
PULSE WIDTH (SEC)
TEMPERATURE ( C)
POWER DISS. VS LEAD TEMP. (UM4300)
POWER DISS. VS LEAD TEMP. (UM7300)
POWER RATINGS (STUD PKG)
20
18 W
MAX POWER DISSIPATION (W)
15
15 W
UM4300C
UM4300D
10
7.5 W
6W
5
UM7300D
UM7300C
GRAPHS
GRAPHS
0
0
25
50
75
100
STUD TEMPERATURE ( C)
125
o
150
175
Copyright 2005
Rev: 3/30/2009
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page 3
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
UM7300 STYLE ‘SM’ FOOTPRINT
UM4300 STYLE ‘SM’ FOOTPRINT
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.
Microsemi
.
C O M
UM7300 Style SM, A Size Footprint
UM4300 Style SM, B Size Footprint
1. These dimensions will match the terminals and provide for additional solder fillets at the outboard ends
at least as wide as the terminals themselves, assuming accuracy of placement within 0.005”
2. If the mounting method chosen requires use of an adhesive separate from the solder compound, a
round
(or square) spot of cement as shown should be centrally located.
MECHANICAL
MECHANICAL
Copyright 2005
Rev: 3/30/2009
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page 5
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