QST108 STMicroelectronics, QST108 Datasheet - Page 32

• Manufacturer Part Number: QST108
• Description: Capacitive Touch Sensor Device 8 Keys With Individual Key State Outputs Or I2c Interface
• Manufacturer: STMicroelectronics

Electrical characteristics
6.3
32/47
Table 22.
1. All power (V
2. I
3. When several inputs are submitted to a current injection, the maximum ΣI
Operating conditions
Table 23.
ΣI
I
INJ(PIN)
Symbol
Symbol
INJ(PIN)
cannot be respected, the injection current must be limited externally to the I
injection is induced by V
pads, there is no positive injection current, and the corresponding V
respected.
positive and negative injected currents (instantaneous values). These results are based on
characterisation with ΣI
INJ(PIN)
I
I
V
VDD
VSS
I
T
(3)
IO
DD
A
(2)
(2)
must never be exceeded. This is implicitly ensured if V
Total current into V
Total current out of V
Output current sunk by RESET pin
Output current sunk by output pin
Output current source by output pin
Injected current on RESET pin
Injected current output pin
Total injected current (sum of all I/O and control pins)
Operating supply voltage
Operating temperature
Current characteristics
Operating conditions
DD
) and ground (V
INJ(PIN)
IN
>V
DD
SS
maximum current injection on four I/O port pins of the device.
while a negative injection is induced by V
DD
) lines must always be connected to the external supply.
SS
power lines (source)
Ratings
ground lines (sink)
Feature
(1)
(1)
IN
maximum is respected. If V
IN
maximum must always be
INJ(PIN)
IN
<V
INJ(PIN)
SS
Maximum value
is the absolute sum of the
. For true open-drain
-40° to +85°
value. A positive
2.4 to 5.5
± 20
− 25
150
± 5
± 5
75
20
40
Value
IN
maximum
QST108
Unit
Unit
mA
V
C