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

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Visit www.macom.com for additional data sheets and product information.

Also Offering

RoHs Compliant

Equivalent Parts

Surface Mount

Hyperabrupt Varactors

V2

MA4ST400 Series

1

Features

•

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 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.

(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

Part Number

Configuration

MA4ST401-287T

MAVR-000401-0287AT

Single

MA4ST402-287T

MAVR-000402-0287AT

Single

MA4ST403-287T

MAVR-000403-0287AT

Single

MA4ST404-287T

MAVR-000404-0287AT

Single

MA4ST405-287T

MAVR-000405-0287AT

Single

MA4ST406-287T

MAVR-000406-0287AT

Single

MA4ST407-287T

MAVR-000407-0287AT

Single

MA4ST408-287T

MAVR-000408-0287AT

Single

MA4ST409-287T

MAVR-000409-0287AT

Single

MA4ST401CK-287T

MAVR-000401-0287FT

Common Cathode

MA4ST402CK-287T

MAVR-000402-0287FT

Common Cathode

MA4ST403CK-287T

MAVR-000403-0287FT

Common Cathode

MA4ST404CK-287T

MAVR-000404-0287FT

Common Cathode

MA4ST405CK-287T

MAVR-000405-0287FT

Common Cathode

MA4ST406CK-287T

MAVR-000406-0287FT

Common Cathode

MA4ST407CK-287T

MAVR-000407-0287FT

Common Cathode

MA4ST408CK-287T

MAVR-000408-0287FT

Common Cathode

MA4ST409CK-287T

MAVR-000409-0287FT

Common Cathode

RoHs Compliant Parts

Other packages and configurations may be available upon request.

Configurations

Common Cathode

Single