--1--
E94205B82-TE
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any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
Absolute Maximum Ratings (Ta=25 C)
Reverse voltage
V
R
30
V
Maximum reverse voltage V
RM
35
V
(R
L
10 k
)
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
65 to +150
C
Description
The 1T379 is a variable capacitance diode
designed for the electronic tuning of BS and CS
tuners, and it has a super miniature package.
Features
Super miniature package
Small series resistance 1.50
Max. (f=470 MHz)
Large capacitance ratio 12.0
Typ. (C
1
/C
25
)
Small capacitance
0.60 pF Max. (V
R
=25 V)
Structure
Silicon epitaxial planar-type diode
Silicon Variable Capacitance Diode for Electronic Tuning of BS and CS Tuners
M-235
1T379
Electrical Characteristics
(Ta=25 C)
Item
Reverse current
Reverse voltage
Diode capacitance
Capacitance ratio
Series resistance
Capacitance deviation in a
matching group
Symbol
I
R
V
R
C
1
C
25
C
1
/C
25
rs
C
Conditions
V
R
=25 V
I
R
=1 A
V
R
=1 V, f=1 MHz
V
R
=25 V, f=1 MHz
f=1 MHz
V
R
=5 V, f=470 MHz
V
R
=1 to 25 V, f=1 MHz
Min.
Typ.
Max.
Unit
10
nA
30
V
6.0
7.2
pF
0.5
0.6
pF
10.0
12.0
1.50
6
%
--2--
1T379
Diode capacitance vs. Reverse voltage
f=1MHz Ta=25C
10.0
1.0
0.1
C
-
D
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
(
p
F
)
V
R
-Reverse voltage
1
10
100
Diode capacitance vs. Ambient temperature
D
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
C
(
T
a
)
C
(
2
5
C
)
Ta-Ambient temperature (C)
-20
0
20
40
60
80
1.03
1.02
1.01
1.00
0.99
0.98
Thermal coefficient of diode capacitance
V
R
-Reverse voltage (V)
T
h
e
r
m
a
l
c
o
e
f
f
i
c
i
e
n
t
o
f
d
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
(
p
p
m
/
C
)
1000
100
50
1
10
Forward voltage vs. Ambient temperature
V
F
-
F
o
r
w
a
r
d
v
o
l
t
a
g
e
(
V
)
Ta-Ambient temperature (C)
0.90
0.86
0.82
0.78
0.74
0.70
-20
0
20
40
60
f=1MHz
V
R
=1V
V
R
=2V
V
R
=7V
V
R
=15V
V
R
=25V
I
F
=1mA
100
80
--3--
1T379
Reverse voltage vs. Ambient temperature
Ta-Ambient temperature (C)
V
R
-
R
e
v
e
r
s
e
v
o
l
t
a
g
e
(
V
)
44
42
40
38
36
34
-20
0
20
40
60
80
I
R
=10A
Reverse current vs. Reverse voltage
V
R
-Reverse voltage (V)
I
R
-
R
e
v
e
r
s
e
c
u
r
r
e
n
t
(
p
A
)
100
10
1.0
0.1
1
10
Ta=60C
Ta=25C
Ta=80C
Reverse current vs. Ambient temperature
Ta-Ambient temperature (C)
I
R
-
R
e
v
e
r
s
e
c
u
r
r
e
n
t
(
p
A
)
V
R
=28V
100
10
1.0
0.1
-20
0
20
40
60
80
100
SONY CODE
EIAJ CODE
JEDEC CODE
PACKAGE WEIGHT
M-235
1.25
+ 0.2
0.1
0.3
+ 0.1
0.05
1
.
7
0
.
1
2
.
5
0
.
2
1
2
0.3
+ 0.1
0.05
0.9 0.1
0.2
0 0.05
0 to 10
0.11
+ 0.1
0.06
M-235
0.1g
NOTE: Dimension "
" does not include mold protrusion.
Package Outline Unit : mm
1T379
--4--
Marking
1
2
CATHODE MARK
79
B
Notes
1) B:Lot No.(Year and Month of manufacture)
Year;Last one digit
Month;A,B,C(for Oct. to Dec.)
1 to 9(for Jan.to Sept.)
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