1421 Datasheet, PDF (1/2 Pages) Vishay Siliconix – Bulk Metal® Foil Technology 12 Pin Transistor Outline Hermetic Resistor Network

1421
Vishay Foil Resistors
Bulk Metal^® Foil Technology
12 Pin Transistor Outline Hermetic Resistor Network
Product may not
be to scale
The 12 pin TO-8 package is suitable for ladder networks up to ten
bits and other more complicated networks. It is also a good
choice when power dissipation is a consideration. This network
can contain up to 49, V5X5 resistor chips.
Review data sheet “7 Technical Reasons to Specify Bulk
Metal® Foil Resistor Networks.”
ORDERING INFORMATION - 1421 PARTS
Networks are built to your requirements. Send your schematic and
electrical requirements to the Applications Engineering Depart-
ment. (See data sheet “Network Worksheet.”) A unique part
number will be assigned which defines all aspects of your network.
FIGURE 1 - STANDARD DIMENSIONS in inches (millimeters)
0.540 –0.560
(13.71 –14.22)
0.150
(3.81)
MAXIMUM
12 LEADS
0.016 –0.019
(0.41 –0.48)
0.500 _MINIMUM
(12.7)
0.590 –0.610
(14.99 –15.49) ^DIAMETER
0.200 _TYPICAL
(5.08)
0.400 _TYPICAL
(10.16)
67
88
10
5
11
4
12
3 21
VIEWED FROM BOTTOM
0.026 –0.036
(0.66 –0.91)
VISHAY
CHIP
MAXIMUM POWER RATING
MODEL NUMBER CAPACITY
(WATTS) @ +70°C
1421
V5X5 - 49 chips
0.6 Watt
NOTES:
1. These networks utilize Vishay Bulk Metal^® Foil resistor
chips V5X5 and V15X5 or VTF15X10 Thin Film chips.
2. The V5X5 and V15X5 chips have maximum resistance
values of 10K and 33K respectively in Bulk Metal^® Foil
and 500K in VTF15X5 Thin Film chips.
0.100
(2.54)
TYPICAL
0.200 _TYPICAL
(5.08)
0.026 –0.036
(0.66 –0.91)
FIGURE 2 - SAMPLE CIRCUIT DESIGN AND CHIP LAYOUT
6
5
4
R₄
7
R₅
R₃
R₂
3
NOTE: Usable area is represented by dotted lines— a square
0.350 Inches x 0.350 Inches. Illustrations not to scale.
Chips shown undersize for clarity. Drawing view is from
the top looking down into the package.
FOUR DIVIDERS
1 3 4 6 7 9 10 12
8
2
9
R₆ R₇
R₁
1
R₈
2
5
8
11
10
11
12
SALES
• ISRAEL: [e-mail] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [e-mail] • AMERICAS: [e-mail]
• ASIA/JAPAN: [e-mail] • UK/HOLLAND/SCANDINAVIA: [e-mail] • GERMANY/CZECH REPUBLIC/AUSTRIA: [e-mail]
www.vishay.com
124
For technical questions in the Americas, contact [e-mail]
Document Number: 63042
For technical questions in Asia/Japan/Europe/Africa/Israel, contact [e-mail]
Revision 08-Mar-05