TWPEC 1W404 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 0.65Ω Max (ｆ=470MHz) ．Large capacitance ratio 11.5 Typ (C2/C25) ．Small leakage current 10nA Max (VR=28V) ．Capacitance deviation within ２％ Absolute Maximum Ratings (Ta=25℃) ．Reverse voltage ＶＲ 34 Ｖ ．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 Item Reverse voltage Reverse current Diode capacitance Capacitance ratio Symbol Conditions ＶR IR=1μA IR VR=28V Min. Typ. (Ta=25℃) Max. Unit 34 V 10 nA Ｃ2 VR=2V, f=1MHz 29.50 33.50 pF Ｃ25 VR=25V, f=1MHz 2.60 2.90 pF 0.65 Ω Ｃ2/Ｃ25 11.0 Ｃ25/Ｃ28 1.03 11.5 CD=14pF, f=470MHz Series resistance rs Tester：4191A 0.58 Tester：4291B 0.61 Capacitance deviation in a ΔＣ VR=2～25V, f=1MHz 2.0 matching group △C：The 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. 1 1W404 TWPEC Product Name and Package Specification for the 1W404 According to the classification number for the combination of capacitance deviations (hereafter ΔC), 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: ΔC 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 1W404 TWPEC Package outline Unit: mm n o i s u r t o r p d l o m e d u l c n i t o n s e o d " " n o i s n e m i D : E T O N W4 3 1W404 TWPEC Rs vs. Reverse voltage Diode capacitance vs. Reverse voltage 1.0 100 Rs （Ω） C-Diode capacitance (pF) 0.8 10 0.4 0.2 1 0.0 1 10 100 1 VR-Reverse voltage (V) 1.03 VR=1V 1.02 VR=2V VR=7V VR=25V VR=15V 1.01 1.00 0.99 0.98 -20 0 10 100 Reverse voltage VR (V) Diode capacitance vs. Ambient temperature C (Ta)/C(25℃) Diode capacitance 0.6 20 40 60 80 Ta-Ambient temperature ( ℃） DATA SHEET V1.1 4