1421
Vishay Foil Resistors
Bulk Metal® Foil Technology
12 Pin Transistor Outline Hermetic Resistor Network
The12pinTO-8packageissuitableforladdernetworksuptoten
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.”
Product may not
be to scale
ORDERING INFORMATION - 1421 PARTS
Networksarebuilttoyourrequirements. Sendyourschematicand
electrical requirements to the Applications Engineering Depart-
ment. (See data sheet “Network Worksheet.”) A unique part
numberwillbeassignedwhichdefinesallaspectsofyournetwork.
FIGURE 1 - STANDARD DIMENSIONS in inches (millimeters)
0.540 –0.560
(13.71 –14.22)
0.150
(3.81)
VISHAY
MODEL NUMBER CAPACITY
CHIP
MAXIMUM POWER RATING
MAXIMUM
(WATTS) @ +70°C
0.500
(12.7)
MINIMUM
12 LEADS
0.016 –0.019
(0.41 –0.48)
1421
V5X5 - 49 chips
0.6 Watt
0.590 –0.610
(14.99 –15.49)
DIAMETER
NOTES:
1. These networks utilize Vishay Bulk Metal® Foil resistor
chips V5X5 and V15X5 or VTF15X10 Thin Film chips.
VIEWED FROM BOTTOM
0.200
(5.08)
7
3
8
2
8
TYPICAL
6
5
4
10
0.026 –0.036
(0.66 –0.91)
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.
11
12
0.400
(10.16)
TYPICAL
1
0.100
(2.54)
TYPICAL
0.026 –0.036
(0.66 –0.91)
0.200
(5.08)
TYPICAL
FIGURE 2 - SAMPLE CIRCUIT DESIGN AND CHIP LAYOUT
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.
6
5
4
R4
R2
R5
FOUR DIVIDERS
3
2
1
7
R3
1
3
4
6
7
9
10 12
8
9
R7
R1
R6
2
5
8
11
R8
10
11
12
SALES
• ISRAEL: foilsales.israel@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
For technical questions in the Americas, contact foilsupport1@vishay.com
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
www.vishay.com
124
Document Number: 63042
Revision 08-Mar-05