QST102 STMicroelectronics, QST102 Datasheet - Page 17

• Manufacturer Part Number: QST102
• Description: Capacitive Touch Sensor Device 2 Keys With Individual Key State Outputs
• Manufacturer: STMicroelectronics

QST102
6.2.3
6.3
6.3.1
Current characteristics
Table 6.
1. All power (V
2. I
3. When several inputs are submitted to a current injection, the maximum ΣI
EMC characteristics
Susceptibility tests are performed on a sample basis during product characterization.
Functional EMS (electro magnetic susceptibility)
The product is stressed by two electro magnetic events until a failure occurs:
●
●
A device reset allows normal operations to be resumed. The test results are given in the
table below based on the EMS levels and classes defined in application note AN1709.
Table 7.
I
ΣI
INJ(PIN)
cannot be respected, the injection current must be limited externally to the I
injection is induced by V
positive and negative injected currents (instantaneous values).
Symbol
INJ(PIN)
Symbol
V
V
INJ(PIN)
ESD: Electro-Static Discharge (positive and negative) is applied on all pins of the
device until a functional disturbance occurs. This test conforms with the IEC 1000-4-2
standard.
FTB: A Burst of Fast Transient voltage (positive and negative) is applied to V
V
conforms with the IEC 1000-4-4 standard.
FESD
I
FFTB
I
VDD
VSS
I
SS
IO
(2)(3)
through a 100pF capacitor, until a functional disturbance occurs. This test
must never be exceeded. This is implicitly ensured if V
(2)
Current characteristics
Functional EMS
DD
Voltage limits to be applied on any I/O
pin to induce a functional disturbance
Fast transient voltage burst limits to be
applied through 100pF on V
pins to induce a functional disturbance
) and ground (V
Total current into V
Total current out of V
Output current sunk by KOUT pins
Output current source by KOUT pins
Injected current on KOUT pins
Total injected current (sum of all I/O and control pins)
IN
> V
DD
SS
Parameter
) lines must always be connected to the external supply.
while a negative injection is induced by V
DD
SS
power lines (source)
Ratings
ground lines (sink)
DD
and V
DD
V
complies with IEC 1000-4-2
V
complies with IEC 1000-4-4
IN
(1)
(1)
DD
DD
maximum is respected. If V
=5V, T
=5V, T
INJ(PIN)
A
A
Conditions
=+25°C,
=+25°C
IN
INJ(PIN)
Electrical characteristics
< V
is the absolute sum of the
SS
Maximum value
value. A positive
.
± 20
− 25
150
± 5
75
20
IN
maximum
DD
and
Level/
Class
Unit
mA
3B
4A
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