Alpha Industries, Inc. [781] 935-5150

• Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com

1

Specifications subject to change without notice. 1/01A

Low Capacitance

Plastic Packaged PIN Diodes

Features

s Designed for High Performance Wireless

Switch Applications

s 0.25 pF Capacitance Specified

s Multiple Package Configurations

s Available in Tape and Reel Packaging

Description

The SMP1321 series of plastic packaged, surface

mountable PIN diodes are designed for high volume switch

applications from 10 MHz to beyond 2 GHz. The low

capacitance of these diodes (0.25 pF) combined with its low

resistance (2.0

Ω maximum at 10 mA) make the SMP1321

series particularly suited to high isolation series connected

PIN diode switches in battery operated circuits. Available

in a selection of plastic packages and in a variety of

configurations including a low inductance (0.4 nH) SOT-23

(SMP1321-007), the small footprint SC-79 and the

miniature SC-70.

SMP1321 Series

Parameter

Condition

Typ.

Max.

Unit

10

µA

F = 1 MHz, V = 30 V

0.25

pF

F = 100 MHz, I = 1 mA

3.0

Ω

F = 100 MHz, I = 10 mA

2.0

Ω

IF = 10 mA

0.85

V

Carrier Lifetime (TI)

IF = 10 mA

0.4

µS

I Region Width

15

µm

Electrical Specifications at 25°C

Characteristic

Value

100 V

Power Dissipation @ 25°C Lead

250 mW

-65°C to +150°C

-65°C to +150°C

ESD Human Body Model

Class 1B

Absolute Maximum Ratings

Single

Common

Common

Series Pair

Low

Single

Single

Anode

Cathode

Inductance

Marking: PM1

Marking: PM9

Marking: PM3

Marking: PM2

Marking: PMB

SOT-23

SOT-23

SOT-23

SOT-23

SOT-23

SOD-323

SC-79

o

SMP1321-001

o

SMP1321-003

o

SMP1321-004

o

SMP1321-005

o

SMP1321-007

o

SMP1321-011

o

SMP1321-079

SC-70

SC-70

SC-70

o

SMP1321-073

o

SMP1321-074

o

SMP1321-075

o Available through distribution.