QT60168-AG QUANTUM [Quantum Research Group], QT60168-AG Datasheet - Page 27
QT60168-AG
Manufacturer Part Number
QT60168-AG
Description
16, 24 KEY QMATRIX ICs
Manufacturer
QUANTUM [Quantum Research Group]
Datasheet
1.QT60168-AG.pdf
(28 pages)
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7.2 1-Sided Key Layout
This key design can be made on a 1-sided SMT PCB. A single 0-ohm jumper
allows the wiring to be done on a single side with full pass-through of X and Y
traces to allow matrix connections to be made across a large number of keys.
Key size, shape, and number of interleavings can be varied substantially from
this drawing. The below drawing shows 6 interleave white spaces; only a
double interleave is required in the case of smaller keys.
The PCB is bonded to a panel on its underside, and the fields fire through the
PCB, adhesive, and panel in that sequence. This results in a very low cost
design.
7.3 PCB Layout
Shown is an example PCB layout using inexpensive 1-sided CEM-1 or FR-1 PCB laminate. The key layouts follow the design
rules shown above. (PCB design shown uses a QT60326 chip but still represents a good example).
lQ
27
X
QT60248-AS R4.02/0405
Y
Y
0-ohm SMT Jumper
X
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