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Электронный компонент: E1W404

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TWPEC
Variable Capacitance Diode
Description
The 1W404 is a variable capacitance diode contained
for electronic tuning of wide-band CATV tuners using a
super-small-miniature flat package (SSVC).
Features
Super-small-miniature flat package
Low series resistance
0.65 Max (=470MHz)
Large capacitance ratio
11.5 Typ (C2/C25)
Small leakage current
10nA Max (V
R
=28V)
Capacitance deviation within
Absolute Maximum Ratings (Ta=25)
Reverse voltage
34
Operating temperature
Topr -20+75
Applications
Storage temperature
Tstg -65+150
Electronic tuning of wide-band CATV tuners
Structure
Silicon epitaxial planar type diode

Electrical Characteristics (Ta=25)
Item Symbol
Conditions
Min.
Typ.
Max.
Unit
Reverse voltage
R
I
R
=1A
34
V
Reverse current
I
R
V
R
=28V
10
nA
2
V
R
=2V, f=1MHz
29.50
33.50
pF
Diode capacitance
25
V
R
=25V, f=1MHz
2.60
2.90
pF
2
/
25
11.0
11.5
Capacitance ratio
25
/
28
1.03

Series resistance
rs
C
D
=14pF, f=470MHz
Tester4191A
Tester4291B
0.58
0.61
0.65
Capacitance deviation in a
matching group
V
R
=225V, f=1MHz
2.0
%
CThe capacitance deviation of continuous 20 pcs of 1W404 is ranged within 2% in any
place of the taping package.

TWPEC reserves the right to change products and specifications without prior notice. This information does not
convey any license by any implication or otherwise under any patens or other right. Application circuits shown,
if any, are typical examples illustrating the operation of the devices. TWPEC cannot assume responsibility for
any problems arising out of the use of these circuits.
1W404

1
1W404
TWPEC
Product Name and Package Specification for the 1W404
According to the classification number for the combination of capacitance deviations (hereafter C), assembly
method and automatic mounting equipment section, the following product names are assigned.




1W404 M 020 A T8
A
Note 1:Package specification as ordered by customer
*
Taping direction *T8 only to consolidate specifications
Special selection symbol
Note 2: C kit number
Note 3:Assembly method M=MAP
Note 1) In taping packaging of products groups according to the C classification, products must be
divided according to the group. If taping is performed without grouping into categories,
products from two different groups may be mounted on the same tuner, so that C cannot be
assured during tuning, making tuning defective.
A: The SSVC (4000 pieces/reel) product is put on the taping reel with every other empty
section for SSVC .and 9 empty sections are to be provided at each ranking section for SSVC
4000pieces/reel.



E: The SSVC (8000 pieces/reel) product is put on the taping reel with every other empty
section for SSVC .and 4 empty sections are to be provided at each ranking section for SSVC
8000pieces/reel.




Note 2) C kit number
When taping each group, taping is performed in kit number multiples.
001; Incomplete kit (C not guaranteed)
004; 4 kits
020; 20 kits
Recommended kit number; 4 and 20
Other) Minimum number of kits per group is 240 (60 or more at the beginning of the carrier
tape). Up to 9 ranks for SSVC 4000pieces/reel, and 12 ranks for SSVC 8000 pieces/reel.

Note 3) "MAP" is the method where the neighboring chips are assembled continuously in order to
enhance the concentration of the capacitance deviation in a matching group.

2
N O T E : D i m e n s i o n "
" d o e s n o t i n c l u d e m o l d p r o t r u s i o n
1W404
TWPEC


Package outline Unit: mm
























W4






3
1W404
TWPEC
Diode capacitance vs. Reverse voltage
1
10
100
1
10
1
VR-Reverse voltage (V)
C
-
D
i
ode capacitance (pF)
00
Rs vs. Reverse voltage
0.0
0.2
0.4
0.6
0.8
1.0
1
10
100
Reverse voltageVR (V)
Rs
Diode capacitance vs. Ambient
temperature
0.98
0.99
1.00
1.01
1.02
1.03
-20 0 20 40 60 80
Ta-Ambient temperature (
C (Ta
)
/C(2
5
)
D
i
ode capacitance
VR=2V
VR=1V
VR=7V
VR=25V
VR=15V
DATA SHEET V1.1
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