Step Recovery
Diodes
Features
q
q
q
MA43000, MA44600,
MA44700 Series
V3.00
q
Low Transition Times
Tight Capacitance Ranges
High Voltage and Low Thermal Resistance
for Higher Input Power
Surface Mount Package Available (SOT-23)
Description
The MA44600 series of Step Recovery diodes is designed
for use in low and moderate power multipliers with out-
put frequencies of up to 20 GHz. These Step Recovery
diodes generate harmonics by storing a charge as the
diode is driven to forward conductance by the positive
voltage of the input signal. When the signal reverses
polarity, this charge is extracted. The Step Recovery diode
will appear as a low impedance current source until all the
charge is extracted, then it will “snap” to a higher imped-
ance. This causes a voltage pulse to form in the impulse
circuit of the multiplier. Step Recovery diodes make
excellent high order multipliers such as comb generators.
They are also useful as efficient moderate power X2- X4
multipliers.
Applications
High Order Narrow Band Moderate Power Multipliers
(MA44600 series)
Comb Generators (MA43592, MA43543)
High Power Circuit Tested Multiplier (MA43000 Series)
Surface Mount Low Power Multipliers (MA44700 Series)
Specifications Subject to Change Without Notice.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
1
Asia/Pacific: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
Step Recovery Diodes
MA43000, MA44600, MA44700 Series
V3.00
Electrical Specifications
@ 25°C
Snap Varactors
Minimum2
Reverse
Voltage V
R
(Volts)
20
20
20
20
20
30
30
30
40
40
40
50
50
50
60
60
60
60
Junction3
Capacitance
Range (C
j
)
Min./Max.
(pF)
0.2 / 0.3
0.3 / 0.4
0.4 / 0.5
0.5 / 0.7
0.7 / 0.9
0.3 / 0.5
0.5 / 0.7
0.7 / 0.9
0.4 / 0.6
0.6 / 0.8
0.8 / 1.1
0.5 / 0.7
0.7 / 0.9
0.9 / 1.1
0.7 / 0.9
0.9 / 1.1
1.1 / 1.5
1.5 / 2.0
Minimum
Lifetime
10 mA/6 mA
TI (ns)
7
7
7
7
7
8
8
8
12
12
12
15
15
15
20
20
20
20
Transition Time T
S
4
(ps)
Nominal
50
50
50
50
50
70
70
70
90
90
90
150
150
150
250
250
250
250
Max.
100
100
100
100
100
100
100
100
150
150
150
200
200
200
300
300
300
300
Model1
Number
MA44621A
MA44621B
MA44621C
MA44622A
MA44622B
MA44631A
MA44631B
MA44631C
MA44641A
MA44641B
MA44641C
MA44652A
MA44652B
MA44652C
MA44663A
MA44663B
MA44663C
MA44663D
Notes:
1. When ordering, specify the desired case style by adding the case des-
ignation as a suffix to the model number. Case styles for the MA44600
series are 30, 91 and 93. To order in chip form, add the suffix “134” to
the model number. The nominal chip size for the MA44600 series is
15 mils.
2. Reverse voltage (V
R
) is measured at a reverse bias current of 10 µA.
3. Junction capacitance is measured at a reverse voltage of 6 volts and a
frequency of 1 MHz.
4. Transition time is measured between 20% and 80% points on the volt-
age recovery trace. Test conditions are +10 mA and -10 volts.
Case Styles
(See appendix for complete dimensions)
30
91
93
134
Specifications Subject to Change Without Notice.
2
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
M/A-COM, Inc.
Asia/Pacific: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
Step Recovery Diodes
Electrical Specifications
@ 25° C (Cont’d)
High Power Circuit Tested Step Recovery Diodes
MA43000, MA44600, MA44700 Series
V3.00
Model
Number
MA43000
MA43002
MA43004
Case1
Style
103
91
91
Minimum
Output
Power
(Watts)
4.0
1.5
0.3
Input
Frequency
(GHz)
0.333
2.000
3.300
Output
Frequency
(GHz)
2.0
6.0
13.0
Maximum
Input
Power
(Watts)
15
5
2
Min./Max.2
Reverse
Voltage
V
R
(Volts)
85 - 105
45 - 70
30 - 45
Model
Number
MA43000
MA43002
MA43004
Min./Max.3
Junction
Capacitance
C
j
(pF)
3 - 4.50
1.60 - 2.40
0.45 - 0.85
Min./Max.
Lifetime, T
L
10 mA/6 mA
(ns)
250 - 500
75 - 225
20 - 50
Maximum
Snap Time, T
S
-10V/10 mA
(ps)
600
250
150
Maximum
Thermal
Resistance, jc
(C/W)
12
25
45
Surface Mount Step Recovery Diodes (SOT-23)
Min./Max.
Total
Capacitance
(pF)
Model
Number
MA44767
MA44768
MA44769
f = 1 MHz
V
R
= 6 V
3 - 4.5
1.6 - 2.4
0.8 -1.2
30V
Minimum
Reverse
Voltage V
R
(Volts)
I
R
= 10µA
Suggested
Nominal
Carrier
Lifetime
T
L
(ns)
250 - 500
75 - 225
20 - 50
Maximum
Transition
Time
T
S
(psec)
600
250
150
Nominal
Input
Frequency
(GHz)
0.05 - 0.5
0.1 - 1
0.1 - 1
Nominal
Output
Frequency
(GHz)
0.5 - 1.5
0.5 - 2.5
1-5
Notes:
1. The standard case styles are indicated for each model number.
Other case styles are available. Consult the factory for information.
2. Reverse voltage is measured at reverse bias current of 10 µA.
3. Junction capacitance is measured at a reverse bias of 6 volts and
a frequency of 1 MHz.
Case styles
(See appendix for complete dimensions)
91
103
SOT-23 (High Profile)
Specifications Subject to Change Without Notice.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
3
Asia/Pacific: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
Step Recovery Diodes
Electrical Specifications
@ 25° C (Cont’d)
High Order Step Recovery Diode Varactors for Use in Comb Generation
Maximum2
Input
Power
(Watts)
1.0
1.5
Min./Max.3
Reverse
Voltage V
R
(Volts)
25 - 40
20 - 50
Min./Max.4
Junction
Capacitance
Cj
(pF)
0.2 - 0.30
0.2 - 0.55
MA43000, MA44600, MA44700 Series
V3.00
Model
Number
MA43592
MA43543
Case1
Style
30
93
Min./Max.
Carrier
Lifetime, T
L
(ps)
9 - 27
10 - 25
Maximum
Snap Time, T
S
-10V/10 mA
(ps)
90
60
Maximum
Thermal
Resistance
jc(C/W)
70
125
Nominal2
Output
Frequency
(GHz)
1 - 12
2 - 20
Notes:
1. The standard case styles are indicated for each model number. For
other available case styles, consult the factory.
2. This is an operable output frequency range and does not imply instan-
taneous bandwidth.
3. Breakdown voltage is measured at a reverse bias voltage of 10 µA.
4. Junction capacitance is measured at a reverse bias voltage of 6 volts
and a frequency of 1 MHz.
Case Styles
(See appendix for complete dimensions)
30
93
Absolute Maximum Ratings
@ 25°C
Parameter
Temperature Range
Operating Range
-65°C to +200°C
-65°C to +125°C (SOT-23 only)
Storage Range
-65°C to +200°C
-65°C to +125°C (SOT-23 only)
Absolute Maximum
Environmental Performance
The MA44600 and MA43000 series of diodes in ceramic
packages are capable of meeting the tests dictated by the
methods and procedures of the latest revisions of MIL-S-
19500, MIL-STD-202 and MIL-STD-750 which specify
mechanical, electrical, thermal and other environmental
tests common to military semiconductor products.
Specifications Subject to Change Without Notice.
4
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
M/A-COM, Inc.
Asia/Pacific: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
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