Surface Mount
Hyperabrupt Varactors
1
Features
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Description
M/A-COM’s MA4ST400 series are ion-implanted,
hyperabrupt junction, silicon tuning varactors in
the SOT-23 surface mount package. These ther-
mal oxide passivated diodes feature high capaci-
tance ratio and quality factor. They are well suited
for octave bandwidth tuning in the HF to UHF fre-
quency bands. The standard capacitance toler-
ance is ± 10%, with tighter tolerances available.
Capacitance matching at one or more bias volt-
ages is also available.These diodes are offered
with standard Sn/Pb plating, as well as with 100%
matte Sn plating on our RoHS compliant devices.
Applications
The MA4ST400 series tuning varactors are useful
for octave bandwidth tuning applications in the HF
through UHF ranges. Applications include VCOs
and voltage tuned filters in radios, cable TV tun-
ers and test instruments where low cost and ex-
cellent lot-to-lot repeatability are critical. Linear
tuning performance is available from 3 to 8 volts.
Configurations
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
M/A-COM Inc. and its affiliates reserve the right to make changes to the
Common Cathode
Surface Mount Packages
High Quality Factor
Capacitance Ratio to 9.5:1
Tape and Reel Packaging Available
SPC Monitored Ion Implantation for Excellent
C-V Repeatability
Singles and Common Cathode Pairs
Lead-Free (RoHS Compliant) Equivalents
Available with 260 °C Reflow Compatibility
Single
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Equivalent Parts
RoHs Compliant
Absolute Maximum Ratings @ T
(Unless Otherwise Noted)
1. Operation of this device above any one of these parameters
2. Please refer to application note M538 for surface mounting
RoHs Compliant Parts
1
Other packages and configurations may be available upon request.
Suffix refers to package style , configuration and packaging requirements.
Also Offering
MA4ST401CK-287T
MA4ST402CK-287T
MA4ST403CK-287T
MA4ST404CK-287T
MA4ST405CK-287T
MA4ST406CK-287T
MA4ST407CK-287T
MA4ST408CK-287T
MA4ST409CK-287T
may cause permanent damage.
instructions
Part Number
MA4ST401-287T
MA4ST402-287T
MA4ST403-287T
MA4ST404-287T
MA4ST405-287T
MA4ST406-287T
MA4ST407-287T
MA4ST408-287T
MA4ST409-287T
Total Power Dissipation
Operating Temperature
Storage Temperature
Reverse Voltage
Forward Current
Parameter
MAVR-000401-0287AT
MAVR-000402-0287AT
MAVR-000403-0287AT
MAVR-000404-0287AT
MAVR-000405-0287AT
MAVR-000406-0287AT
MAVR-000407-0287AT
MAVR-000408-0287AT
MAVR-000409-0287AT
MAVR-000401-0287FT
MAVR-000402-0287FT
MAVR-000403-0287FT
MAVR-000404-0287FT
MAVR-000405-0287FT
MAVR-000406-0287FT
MAVR-000407-0287FT
MAVR-000408-0287FT
MAVR-000409-0287FT
RoHs Compliant
Part Number
MA4ST400 Series
Absolute Maximum
1
-55 °C to +125 °C
-55 °C to +125 °C
250 mW
50 mA
22V
A
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Common Cathode
Configuration
=+25 °C
Single
Single
Single
Single
Single
Single
Single
Single
Single
V2