M/A-COM Inc. and its affiliates reserve the right to make changes to the
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.
• 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.
Also Offering
RoHs Compliant
Equivalent Parts
Surface Mount
Hyperabrupt Varactors V1
MA4ST400 Series
1
Features
• 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
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 octavebandwidth 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.
Absolute Maximum Ratings @ TA=+25 °C
(Unless Otherwise Noted) 1
1. Operation of this device above any one of these parameters
may cause permanent damage.
2. Please refer to application note M538 for surface mounting
instructions
Parameter Absolute Maximum
Reverse Voltage 22V
Forward Current 50 mA
Operating Temperature -55 °C to +125 °C
Storage Temperature -55 °C to +125 °C
Total Power Dissipation 250 mW
Part Number RoHs Compliant Base
Part Number
MA4ST401 MAVR-000401-XXXXXX
MA4ST402 MAVR-000402-XXXXXX
MA4ST403 MAVR-000403-XXXXXX
MA4ST404 MAVR-000404-XXXXXX
MA4ST405 MAVR-000405-XXXXXX
MA4ST406 MAVR-000406-XXXXXX
MA4ST407 MAVR-000407-XXXXXX
MA4ST408 MAVR-000408-XXXXXX
MA4ST409 MAVR-000409-XXXXXX
RoHs Compliant Parts
1Suffix refers to package style , configuration and packaging requirements.
Contact representative for complete part number information.
Configurations
Common Cathode Single
M/A-COM Inc. and its affiliates reserve the right to make changes to the
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.
• 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.
Also Offering
RoHs Compliant
Equivalent Parts
Surface Mount
Hyperabrupt Varactors V1
MA4ST400 Series
2
Electrical Specifications @ TA = +25 °C
Breakdown Voltage @ IR = 10
μ
A, Vb = 22 V Minimum
Reverse Leakage Current @ VR =20V, IR = 100 nA Maximum
1 The suffix defines package style, configuration and packaging information. Contact representative for complete part identification.
Part Number
Base
RoHs Compliant
Part Number Base1
CT2 Capacitance
Ratio
(pF)
f=1 MHz, VR=4.0V CT2.0/CT20 f=50 MHz,
Min. Nom. Max. Typ. Min.
MA4ST401 MAVR-000401-XXXXXX 9.0 10.0 11.0 6 250
MA4ST402 MAVR-000402-XXXXXX 10.8 12.0 13.2 6.5 250
MA4ST403 MAVR-000403-XXXXXX 13.5 15.0 16.5 7 250
MA4ST404 MAVR-000404-XXXXXX 16.2 18.0 19.8 7 175
MA4ST405 MAVR-000405-XXXXXX 19.8 22.0 24.2 7.5 175
MA4ST406 MAVR-000406-XXXXXX 24.3 27.0 29.7 8 150
MA4ST407 MAVR-000407-XXXXXX 29.7 33.0 36.3 9 150
MA4ST408 MAVR-000408-XXXXXX 35.1 39.0 42.9 9.5 150
MA4ST409 MAVR-000409-XXXXXX 42.3 47.0 51.7 9.5 150
Q Factor
Typical Performance Curves
TOTAL CAPACITANCE (pF) vs REVERSE VOLTAGE
M/A-COM Inc. and its affiliates reserve the right to make changes to the
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.
• 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.
Also Offering
RoHs Compliant
Equivalent Parts
Surface Mount
Hyperabrupt Varactors V1
MA4ST400 Series
3
Case Styles
SOD-323
Case Style 1141
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A ⎯ 0.043 ⎯ 1.1
B ⎯ 0.004 ⎯ 0.1
C ⎯ 0.008 ⎯ 0.2
D 0.010 0.016 0.25 0.4
E 0.003 0.006 0.08 0.15
F 0.063 0.075 1.6 1.9
G 0.045 0.057 1.15 1.45
H 0.091 0.106 2.3 2.7
F
D
H
G
CE
A
B
F
D
H
J
A
G
L
C
E
B
K
N
M
SOT-23 (Case Style 287)
INCHES MILLIMETERS
DIM. MIN. MAX. MIN. MAX.
A ⎯ 0.048 ⎯ 1.22
B ⎯ 0.008 ⎯ 0.20
C ⎯ 0.040 ⎯ 1.00
D 0.013 0.020 0.35 0.50
E 0.003 0.006 0.08 0.15
F 0.110 0.119 2.80 3.00
G 0.047 0.056 1.20 1.40
H 0.037 typical 0.95 typical
J 0.075 typical 1.90 typical
K ⎯ 0.103 ⎯ 2.60
L ⎯ 0.024 ⎯ 0.60
DIM. GRADIENT
M 10° max.1
N 2° . . .30°
SOT-23
Case Style 287
M/A-COM Inc. and its affiliates reserve the right to make changes to the
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.
• 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.
Also Offering
RoHs Compliant
Equivalent Parts
Surface Mount
Hyperabrupt Varactors V1
MA4ST400 Series
4
Mounting Information
The illustration indicates the recommended
mounting pad configuration for the
SOT-23 and SOD-323 packages. Solder paste
containing flux should be screened onto the pads to
a thickness of 0.005- 0.007 inches. The plastic
package is placed in position, firmly adhering to the
solder paste.
Permanent attachment is performed by a reflow
soldering procedure during which the tab
temperature does not exceed +275 °C and the body
temperature does not exceed +250 °C, for standard
models and +260 °C for the RoHS compliant
devices.
Please refer to Application Note M538 for surface
mounting instructions.
SOD-323
0.030
0.80
.090
2.2
0.030
0.80
inches
mm
Dimenstions:
0.030
0.80
0.75
1.9
.037
0.95
.035
0.90
.090
2.2
.030
0.80
inches
mm
Dimenstions:
min.
min.
SOT-23
