November 2000 TOKO, Inc.
Page 1
KV1745S
VARIABLE CAPACITANCE DIODE
n
Excellent Linearity (CV Curve)
n
Large Capacitance Ratio (A = 1.95 minimum) with
Very Low Series Resistance
n
Two Diodes in a Miniature Package (SOT23-3)
n
Very Small Capacitance Deviation at Tape/Reel
n
FM Radio
n
Voltage Controlled Oscillator
K
N
A
R
C
1
2
C
2
N
I
M
3
5
.
3
4
5
7
.
4
4
X
A
M
0
2
.
5
4
8
4
.
6
4
CLASSIFICATION
(Unit: pF)
KV1745S
DESCRIPTION
The KV1745S is specially made to be used as a tuning
element in radio cassettes, stereos, car radios, and other
consumer radios.
The KV1745S minimizes cross modulation, allowing good
signal-to-noise ratio in the overall design.
The KV1745S is available in the miniature SOT23-3 sur-
face mount package.
FEATURES
APPLICATIONS
Note: Rank is determined after testing and marked on the
reel. All the diodes on a reel have the same rank, but rank
can not be specified when ordering.
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Tape/Reel Code
KV1745S
20P
C45
2
1
3
Page 2
November 2000 TOKO, Inc.
KV1745S
L
O
B
M
Y
S
R
E
T
E
M
A
R
A
P
S
N
O
I
T
I
D
N
O
C
T
S
E
T
N
I
M
P
Y
T
X
A
M
S
T
I
N
U
V
V
E
R
e
g
a
t
l
o
V
e
s
r
e
v
e
R
I
V
E
R
A
0
1
=
2
1
V
I
V
E
R
t
n
e
r
r
u
C
e
s
r
e
v
e
R
V
V
E
R
V
0
1
=
0
1
A
n
C
2
2
e
c
n
a
t
i
c
a
p
a
C
e
d
o
i
D
V
V
E
R
z
H
M
1
=
f
,
V
0
.
2
=
3
5
.
3
4
8
4
.
6
4
F
p
C
8
8
e
c
n
a
t
i
c
a
p
a
C
e
d
o
i
D
V
V
E
R
z
H
M
1
=
f
,
V
0
.
8
=
8
3
.
8
1
5
8
.
3
2
F
p
R
S
e
c
n
a
t
s
i
s
e
R
s
e
i
r
e
S
V
V
E
R
z
H
M
0
0
1
=
f
,
V
0
.
2
=
0
3
.
0
A
o
i
t
a
R
e
c
n
a
t
i
c
a
p
a
C
C
2
C
/
8
5
9
.
1
5
3
.
2
ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25 C
Note 1: Diode Capacitance measured with HP 4279A or equivalent instruments (at OSC level 20 mVrms, 5 mVrms).
Note 2: Series Resistance measured with HP 4291B or equivalent instruments.
Note 3: The tolerance of two adjacent parts on a reel is within 3% at C2, and C8.
Note 4: The value of capacitance is the average of 2 back to back type diodes.
ABSOLUTE MAXIMUM RATINGS
Storage Temperature Range .................... -55 to +150 C
Operating Temperature Range .................. -55 to +85 C
Lead Soldering Temperature (10 s) ...................... 235 C
Reverse Voltage ........................................................ 14V
Forward Current .................................................... 50 mA
Power Dissipation ............................................... 100 mW
November 2000 TOKO, Inc.
Page 3
KV1745S
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE-COEFFICIENT vs.
REVERSE VOLTAGE
VREV (V)
TEMPERA
TURE-COEFFICIENT
(
ppm/
C)
100
1000
0 1 2 3 4 5 6 7 8 9
300
TA = -55C~+85C
f = 1MHz
REVERSE VOLTAGE vs.
FREQUENCY
FREQUENCY (MHz)
Rs
(
)
10
100
1000
0.1
0.3
0.5
1
Vr = 2v
TA =
+25C
REVERSE VOLTAGE vs. Q
VREV (V)
Q
10
100
0 1 2 3 4 5 6 7 8 9
10000
TA = +25C
1000
f = 50MHz
70MHz
100MHz
0 2 4 6 8 10 12 14 16
VREV (V)
I REV
(
nA)
1
0.1
0.001
0.0001
REVERSE CURRENT vs.
REVERSE VOLTAGE
TA = +85C
0.01
+25C
+55C
VREV (V)
1.05
1.00
1.03
0.96
0.95
TA = +85C
-55C
+25C
-15C
+55C
f = 1MHz
0 1 2 3 4 5 6 7 8 9
0.98
0.99
1.02
1.04
C(TAC)/C(25C) vs.
REVERSE VOLTAGE
0.97
1.01
C(T
A
C)/C(25
C)
CAPACITANCE vs.
REVERSE VOLTAGE
VREV (V)
0 1 2 3 4 5 6 7 8 9
CA
PA
CITA
NCE (p
F)
10
100
TA = +25C
f = 1MHz
Page 4
November 2000 TOKO, Inc.
KV1745S
Marking Information
Product Code
C45
SOT23-3
PACKAGE OUTLINE
Printed in the USA
1999 Toko, Inc.
All Rights Reserved
TOKO AMERICA REGIONAL OFFICES
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864
IC-xxx-KV1710S
XXXXX.0K
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its
products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of
third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
Mark
Dimensions are shown in millimeters
Tolerance: x.x = 0.2 mm (unless otherwise specified)
Recommended Mounting Pad
e
2.9
0.4
+0.10
- 0.05
e
1
.
3
m
a
x
1
.
1
0
.
1
5
+
0
.
1
0
-
0
.
0
5
0
~
0
.
1
2.8
0.4
1.6
2
.
4
0
.
1
Western Regional Office
Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
Semiconductor Technical Support
Toko Design Center
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
Fax: (719) 528-2375
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