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

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.

ABSOLUTE MAXIMUM RATINGS AT 25º C

(UNLESS OTHERWISE SPECIFIED)

UM4300

UM7300

Pkg

Condition

(W)

θ

(°C/W)

(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



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.