QST108 datasheet(34/38 Pages) STMICROELECTRONICS

部品番号	QST108

部品情報	Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface

PDF	38 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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34 / 38 page

Electrical characteristics

QST108

34/38

6.7

RESET pin

TA = -40°C to 125°C, unless otherwise specified.

Table 28.

RESET pin characteristics

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VIL

Input low level voltage

VSS − 0.3

0.3x VDD

VIH

Input high level voltage

0.7 x VDD

VDD + 0.3

Vhys

Schmitt trigger voltage

hysteresis(1)

Data based on characterization results, not tested in production.

VOL

Output low level

voltage(2)

The IIO current sunk must always respect the absolute maximum rating specified in Table 21: Current

characteristics on page 29 and the sum of IIO (I/O ports and control pins) must not exceed IVSS.

VDD = 5V IIO = +2mA

200

TBD

RON

Pull-up equivalent

resistor(3)

The RON pull-up equivalent resistor is based on a resistive transistor. Specified for voltages on RESET pin

between VILmax and VDD.

VIN = VSS

VDD = 5V

VDD = 3V

90(1)

tw(RSTL)out

Generated reset pulse

duration

Internal reset sources

90(1)

μs

th(RSTL)in

External reset pulse

hold time(4)

To guarantee the reset of the device, a minimum pulse has to be applied to the RESET pin. All short pulses

applied on RESET pin with a duration below th(RSTL)in can be ignored.

μs

tg(RSTL)in Filtered glitch duration

200

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