Copyright 2005
Rev: 3/30/2009
WWW .
Microsem
i. CO M
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page
1
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
DESCRIPTION
The UM4300 and UM7300 series com bine 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 res ult of transit time frequenc ies 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.
ABSOLUTE MAXIMUM RATINGS AT 25º C
(UNLESS OTHERWISE SPECIFIED)
UM4300 UM7300
Pkg Condition P
D
(W)
θ
(°C/W) P
D
(W)
θ
(°C/W)
A 25 °C Pin Temperature 20 7.5 7.5 20
B & E ½ in. total length to 25 °C
Contact Free Air 10
2.5 15 4 37.5
C 25 °C Stud Temperature 20 7.5 7.5 20
D 25 °C Stud Temperature 15 10 6 25
SM 25 °C End Cap Temperature 15 20 5.5 18
ALL 1 us pulse (Single) 500 kW 100 kW
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
APPLICATIONS / BENEFITS
RF Switching
RF Attenuators
Pick and Place compatible
Surface Mount Versions
1RoHS compliant packaging available:
use UMX4301SM, etc
VOLTAGE RATINGS
Reverse Voltage @ 10uA Part Number
100 UM4301 UM7301
200 UM4302 UM7302
600 UM4306 UM7306
1000 UM4310 UM7310
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.
U
UM
M4
43
30
00
0
/
/
U
UM
M7
73
30
00
0
Copyright 2005
Rev: 3/30/2009
WWW .
Microsem
i. CO M
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page
2
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
ELECTRICAL CHARACTERISTICS (@ 25°C unless otherwise specified)
Parameter Symbol Conditions UM4300 UM7300 Units
Reverse Current (Max) IR At rated voltage 10 10 uA
Series Resistance(Max) RS If = 100 mA, F= 100 MHz 1.5 3.0 Ohms
Series Resistance(Min) RS If = 10 uA, F= 100 MHz 1000 3000 Ohms
Capacitance (Max) CT VR = 100 V, F = 1 MHZ 2.2 0.7 pF
Parallel Resistance(Min) RP VR = 100 V, F = 100 MHz 200k 150k Ohms
Carrier Lifetime(Min)
τ
IF = 10 mA 6.0 4.0 us
I-Region Width (Min) W - - 250 250 um
TYPICAL RS VS IF
TYPICAL IF VS VF
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Vf (V)
-5
10
-4
10
-3
10
-2
10
-1
10
0
10
If (A)
TYPICAL
UM4300
UM7300
RP VS VR (UM4300)
RP VS VR (UM4300)
0
10 1
10 2
10 3
10
Vr (V)
0
10
1
10
2
10
Rp (kOhms)
100 MHz
500 MHz
1 GHz
3 GHz
G
GR
RA
AP
PH
HS
S
Copyright 2005
Rev: 3/30/2009
WWW .
Microsem
i. CO M
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page
3
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
THERMAL IMP. VS PULSE WIDTH NORMALIZED RS VS TEMP.
-6
10 -5
10 -4
10 -3
10 -2
10 -1
10 0
10
PULSE WIDTH (SEC)
-3
10
-2
10
-1
10
0
10
1
10
2
10
PULSE THERMAL IMPEDANCE ( C/W)
UM7300
UM4300
o
-60 -40 -20 0 20 40 60 80 100 120
TEMPERATURE ( C)
0.7
0.8
0.9
1.0
1.1
1.2
1.3
NORMALIZED DIODE RESISTANCE
o
POWER DISS. VS LEAD TEMP. (UM4300) POWER DISS. VS LEAD TEMP. (UM7300)
POWER RATINGS (STUD PKG)
0 25 50 75 100 125 150 175
STUD TEMPERATURE ( C)
0
5
10
15
20
MAX POWER DISSIPATION (W)
UM4300C
UM4300D
UM7300C
UM7300D
6 W
15 W
18 W
7.5 W
o
G
GR
RA
AP
PH
HS
S
Copyright 2005
Rev: 3/30/2009
WWW .
Microsem
i. CO M
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page
4
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
PACKAGE STYLES
STYLE ‘A’ STYLE ‘B’
STYLE ‘C’ STYLE ‘CR’
STYLE ‘D’ STYLE ‘DR’
STYLE ‘E’ STYLE ‘SM’
M
ME
EC
CH
HA
AN
NI
IC
CA
AL
L
Copyright 2005
Rev: 3/30/2009
WWW .
Microsem
i. CO M
Microsemi
Microwave Products
75 Technology Drive, Lowell MA 01851 Tel: (978) 442-5600
Page
5
UM4300 / UM7300
SWITCHING / ATTENUATOR PIN DIODES
UM7300 STYLE ‘SM’ FOOTPRINT UM4300 STYLE ‘SM’ FOOTPRINT
UM7300 Style SM, A Size Footprint UM4300 Style SM, B Size Footprint
1. These dimensions will match the terminals and provide for additional sol der fillets at the outboard ends
at least as wide as the terminals themselves, assumi ng accuracy of placement within 0.005”
2. If the mounting method chosen requires use of an a dhesive separate from the solder comp ound, a
round
(or square) spot of cement as shown should be centrally located.
M
ME
EC
CH
HA
AN
NI
IC
CA
AL
L
