Low Capacitance
Plastic Packaged PIN Diodes
SMP1321 Series
Features
■ Designed for High Performance Wireless
Switch Applications
■ 0.25 pF Capacitance Specified
■ Multiple Package Configurations
■ 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.
Absolute Maximum Ratings
Characteristic
Value
100 V
Reverse Voltage (V )
R
Power Dissipation @ 25°C Lead
250 mW
Temperature (P )
D
Storage Temperature (T
)
-65°C to +150°C
-65°C to +150°C
Class 1B
ST
Operating Temperature (T
ESD Human Body Model
)
OP
Single
Common
Anode
Common
Cathode
Series Pair
Low
Inductance
Single
Single
SC-79
Marking: PM1
SOT-23
Marking: PM9
SOT-23
Marking: PM3
SOT-23
Marking: PM2
SOT-23
Marking: PMB
SOT-23
SOD-323
■ SMP1321-001
■ SMP1321-003
■ SMP1321-004
■ SMP1321-005
■ SMP1321-007
■ SMP1321-011
■ SMP1321-079
L
S
= 1.5 nH
L
S
= 1.5 nH
SC-70
L
S
= 1.5 nH
SC-70
L
= 1.5 nH
SC-70
L
= 0.4 nH
L
= 1.5 nH
L = 0.7 nH
S
S
S
S
■ SMP1321-073
= 1.4 nH
■ SMP1321-074
= 1.4 nH
■ SMP1321-075
= 1.4 nH
L
L
L
S
S
S
■ Available through distribution.
Electrical Specifications at 25°C
Parameter
Condition
V = 100 V
R
Typ.
Max.
10
Unit
µA
pF
Ω
Reverse Current (I )
R
Capacitance (C )
F = 1 MHz, V = 30 V
0.25
T
Resistance (R )
F = 100 MHz, I = 1 mA
F = 100 MHz, I = 10 mA
IF = 10 mA
3.0
S
Resistance (R )
2.0
Ω
S
Forward Voltage (V )
0.85
0.4
15
V
F
Carrier Lifetime (TI)
I Region Width
IF = 10 mA
µS
µm
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