Surface Mount
Abrupt Tuning Varactors
Features
q
q
q
q
q
q
MA45430 Series
V3.00
SOT-23
Surface Mount Package
Low Cost
High Quality Factor
Tape and Reel Packaging Available
SPC Controlled Process for Superior C-V Repeatability
Available as Singles and Common Cathode Pairs
Description
The MA45430 series are abrupt junction silicon tuning
varactors in the SOT-23 surface mount package. These
thermal oxide passivated diodes feature high capacitance
ratio and quality factor. They are well suited for tuning in
the HF to UHF frequency bands. The standard capaci-
tance tolerance is ±10%, with tighter tolerances available.
Capacitance matching at one or more bias voltages is
also available.
Configurations
TOP VIEW
Applications
The MA45430 series tuning varactor is useful for tuning
applications in the HF through UHF ranges. Applications
include VCOs and voltage tuned filters in radios, cable
TV tuners and test instruments where low cost and excel-
lent lot-to-lot repeatability are critical.
Ordering Information
The part numbers shown are for single diodes. When
ordering diodes in common cathode pairs add suffix
“CK.” For example, MA45436CK specifies model number
MA45436 as a common cathode pair. To order parts on
tape and reel add suffix T/R to the end of the part num-
ber. i.e. MA45436CK - T/R.
(SINGLE)
(COMMON CATHODE PAIR)
Absolute Maximum Ratings at 25°C
Parameter
Absolute Maximum
30 V
50 mA
250 mW
-55°C to +150°C
-55°C to +150°C
Reverse Voltage
Forward Current
Total Power Dissipation
1
Junction Operating Temperature
Storage Temperature
Mounting Information
The diagram below indicates the recommended mount-
ing pad configuration for the SOT-23 package. Solder
paste containing flux should be screened onto the pads
to a thickness of 0.005 inches. The SOT-23 device is
placed in position, firmly adhering to the solder paste.
Permanent attachment is performed by a reflow soldering
procedure. The tab temperature must not exceed 275°C
and the body temperature must not exceed 250°C.
Specifications Subject to Change Without Notice.
Note:
1. At 25
°
C case temperature. Derate linearly to 0 mW at 150
°
C.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
1
Asia/Pacific: Tel. +81 3 3263 8761
Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
Surface Mount Abrupt Tuning Varactors
Electrical Specifications
@ 25°C
Minimum Breakdown Voltage (V
B
) = 30 Volts at 10µA
Maximum Reverse Current (I
R
) = 100 nA at 24 Volts
Lower capacitance values available upon request
Minimum
Capacitance Ratio
C
T0
/C
T30
4.5
4.5
4.5
4.5
4.5
4.6
4.6
4.7
4.7
4.7
V
R
= 0/30 V
f = 1 MHz
MA45430 Series
V3.00
Typical Performance Curve
CAPACITANCE vs REVERSE VOLTAGE
MA46H070–MA46H073
100
Total Capacitance (pF)
Model
Number
MA45436
MA45437
MA45438
MA45439
MA45440
MA45441
MA45444*
MA45445*
MA45446*
MA45448*
Test
Conditions
Total
Capacitance
C
T4
± 10%
(pF)
4.7
5.6
6.8
8.2
10.0
12.0
22.0
27.0
33.0
47.0
V
R
= 4 V
f = 1 MHz
Minimum
Q
1800
1700
1600
1500
1300
1200
1000
900
750
400
V
R
= 4 V
f = 50 MHz
MA45448
MA45446
10
MA45444
MA45440
MA45438
MA45436
1
0.1
1
10
100
Reverse Voltage (Volts)
Capacitance vs. Reverse Voltage
* Available as single diodes only.
INCHES
DIM.
A
B
C
D
E
F
G
H
J
K
L
DIM.
MIN.
—
—
—
0.013
0.003
0.110
0.047
MAX.
0.048
0.008
0.040
0.020
0.006
0.119
0.056
MILLIMETERS
MIN.
—
—
—
0.35
0.08
2.80
1.20
MAX.
1.22
0.20
1.00
0.50
0.15
3.00
1.40
Case Style
SOT-23 (High Profile)
0.037 typical
0.075 typical
0.103
0.024
GRADIENT
10° max.
1
2°…30º
0.95 typical
1.90 typical
2.60
0.60
DIMENSIONS MILLIMETERS (INCHES)
M
N
Note:
1. Applicable on all sides
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 3 3263 8761
Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
