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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 VR 30 V
• Maximum reverse voltage VRM 35 V
(RL≥10 kΩ)
• 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 Ω Max. (f=470 MHz)
• Large capacitance ratio 12.0 Typ. (C1/C25)
• Small capacitance 0.60 pF Max. (VR=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
IR
VR
C1
C25
C1/C25
rs
∆C
Conditions
VR=25 V
IR=1 µA
VR=1 V, f=1 MHz
VR=25 V, f=1 MHz
f=1 MHz
VR=5 V, f=470 MHz
VR=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 Ω
6%
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1T379
Diode capacitance vs. Reverse voltage
f=1MHz Ta=25°C
10.0
1.0
0.1
C-Diode capacitance (pF)
VR-Reverse voltage
1 10 100
Diode capacitance vs. Ambient temperature
Diode capacitance
C (Ta)
C (25°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)
Thermal coefficient of diode capacitance (ppm/°C)
1000
100
50
1 10
Forward voltage vs. Ambient temperature
V
F
-Forward voltage (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
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1T379
Reverse voltage vs. Ambient temperature
Ta-Ambient temperature (°C)
V
R
-Reverse voltage (V)
44
42
40
38
36
34
-20 0 20 40 60 80
I
R=10µA
Reverse current vs. Reverse voltage
V
R-Reverse voltage (V)
I
R
-Reverse current (pA)
100
10
1.0
0.1
1 10
Ta=60°C
Ta=25°C
Ta=80°C
Reverse current vs. Ambient temperature
Ta-Ambient temperature (°C)
I
R
-Reverse current (pA)
VR=28V
100
10
1.0
0.1
-20 0 20 40 60 80
100
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Package Outline Unit : mm
AAA
M-235
AAA
1T379
∗1.25
2
1
+ 0.2
– 0.1
0.3
0.3
+ 0.1
– 0.05
∗0.9 ± 0.1
+ 0.1
– 0.05
2.5 ± 0.2
∗1.7 ± 0.1
NOTE: Dimension “∗” does not include mold protrusion.
0.2
0.11
+ 0.1
– 0.06
0 ± 0.05
0° to 10°
Marking
SONY CODE
EIAJ CODE
JEDEC CODE
M-235
CATHODE MARK
2
79
B
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PACKAGE WEIGHT
Notes
1) B:Lot No.(Year and Month of manufacture)
Year;Last one digit
Month;A,B,C(for Oct. to Dec.)
0.1g
1 to 9(for Jan.to Sept.)
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