HMC641
v01.0108
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 18 GHz
Typical Applications
The HMC641 is ideal for:
• Telecom Infrastructure
• Microwave Radio & VSAT
• Military & Space Hybrids
• Test Instrumentation
Features
Broadband Performance: DC - 18 GHz
High Isolation: 42 dB @ 12 GHz
Low Insertion Loss: 2.1 dB @ 12 GHz
Integrated 2:4 TTL Decoder
Small Size: 1.92 x 1.60 x 0.10 mm
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General Description
Functional Diagram
The HMC641 is a broadband non-reflective GaAs
PHEMT SP4T switch chip. Covering DC to 18 GHz,
this switch offers high isolation and low insertion
loss and extends the frequency coverage of Hittite’s
SP4T switch product line. This switch also includes
an on board binary decoder circuit which reduces
the number of required logic control lines to two. The
switch operates using a negative control voltage of
0/-5V, and requires a fixed Vss bias of -5V. All data
is tested with the chip in a 50 Ohm test fixture con-
nected via one 3.0 x 0.5 mil gold ribbon of minimal
length on each RF port.
Electrical Specifications, TA = +25° C, With 0/-5V Control, Vss= -5V, 50 Ohm System
Parameter
Frequency
Min.
Typ.
Max.
Units
DC - 12 GHz
DC - 18 GHz
1.8
2.8
2.1
3.1
dB
dB
Insertion Loss
DC - 12 GHz
DC - 18 GHz
39
37
42
40
dB
dB
Isolation (RFC to RF1 - RF4)
Return Loss
DC - 12 GHz
DC - 18 GHz
12
11
15
14
dB
dB
“On State”
“Off State”
Return Loss
DC - 18 GHz
2.05- 18 GHz
12
21
15
24
dB
Input Power for 1 dB Compression
dBm
Input Third Order Intercept
(Two-Tone Input Power= +14 dBm Each Tone)
0.05 - 18 GHz
DC - 18GHz
37
40
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
14
95
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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