QT60326-ASG QUANTUM ATMEL, QT60326-ASG Datasheet - Page 30

• Manufacturer Part Number: QT60326-ASG
• Description: TOUCH SENSOR 32 CHAN, SMD, 60326
• Manufacturer: QUANTUM ATMEL

Specifications of QT60326-ASG

• Supply Current: 25mA
• Supply Voltage Range: 4.75V To 5.25V
• Sensor Case Style: TQFP
• No. Of Pins: 44
• Operating Temperature Range: -40°C To +105°C
• Operating Temperature Max: 105°C
• Operating Temperature: RoHS Compliant
• Interface Type: UART, SPI
• Rohs Compliant: Yes

7.3 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.
7.4 PCB Layout
Shown is an example 32-key PCB layout using inexpensive 1-sided CEM-1 or FR-1 PCB laminate. The key layouts follow the
design rules of Figure 2-6 (page 5) and as shown above.
lQ
30
X
QT60486-AS R8.01/0105
Y
Y
0-ohm SMT Jumper
X