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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  
Legal Disclaimer Notice  
Vishay  
Disclaimer  
All product specifications and data are subject to change without notice.  
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf  
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein  
or in any other disclosure relating to any product.  
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any  
information provided herein to the maximum extent permitted by law. The product specifications do not expand or  
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed  
therein, which apply to these products.  
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this  
document or by any conduct of Vishay.  
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless  
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such  
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting  
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding  
products designed for such applications.  
Product names and markings noted herein may be trademarks of their respective owners.  
Document Number: 91000  
Revision: 18-Jul-08  
www.vishay.com  
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