HMC345LP3 / 345LP3E
v04.0805
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
Typical Applications
Features
This switch is suitable for usage in DC - 8.0 GHz 50-
Ohm or 75-Ohm systems:
Broadband Performance: DC - 8 GHz
High Isolation: 35 dB@ 6 GHz
• Broadband
Low Insertion Loss: 2.2 dB@ 6 GHz
Integrated Positive Supply 2:4 TTL Decoder
3 x 3 mm SMT Package
• Fiber Optics
• Switched Filter Banks
• Wireless below 8 GHz
Functional Diagram
General Description
The HMC345LP3 & HMC345LP3E are broadband
non-reflective GaAs MESFET SP4T switches in low
cost leadless surface mount packages. Covering DC
to 8 GHz, this switch offers high isolation and low
insertion loss. This switch also includes an on board
binary decoder circuit which reduces the required
logic control lines to two. The switch operates using a
positive control voltage of 0/+5V, and requires a fixed
bias of +5V.
10
* Blocking capacitors are required at ports RFC and RF1,
2, 3, & 4. Their value will determine the lowest transmission
frequency.
Electrical Specifications, TA = +25° C, With 0/+5V Control, 50 Ohm System
Parameter
Frequency
Min.
Typ.
Max.
Units
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
2.0
2.2
2.4
2.4
2.6
2.9
dB
dB
dB
Insertion Loss
Isolation
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
37
32
31
27
42
37
35
32
dB
dB
dB
dB
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
10
8
7
13
11
10
9
dB
dB
dB
dB
Return Loss
“On State”
“Off State”
6
Return Loss (RF1 - RF4)
2.0 - 8.0 GHz
2.0 - 8.0 GHz
6
10
21
dB
Input Power for 1 dB Compression
Input Third Order Intercept
17
dBm
2.0 - 8.0 GHz
DC - 8.0 GHz
37
45
dBm
(Two-Tone Input Power = +7 dBm Each Tone, 1MHz Tone Separation)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
50
120
ns
ns
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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