QST108 datasheet(5/38 Pages) STMICROELECTRONICS

Part #	QST108

Description	Capacitive touch sensor device 8 keys with individual key state outputs or I2C interface

PDF	38 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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5 / 38 page

QST108

Pin description

5/38

Pin description

Figure 1.

32-pin package pinout

An external pull-up is required on these pins.

32 31 30 29 28 27 26 25

9 10 11 121314 15 16

I2C_SCL/KOUT81)

RESET

VDD_1

GPO4/KOUT4/OPT4

GPO5/KOUT5/OPT5

IRQ/KOUT6/OPT6

I2C_SDA/KOUT71)

SNS_SCK6

SNSK_SCK5

SNSK_SCK2

SNS_SCK3

SNS_SCK4

SNS_SCK5

SNSK_SCK4

SNSK_SCK3

QST108KT6

Table 2.

Device pin description

Pin name

Type (1)

Stand-alone mode function

I2C mode function

If unused

OPT4/KOUT4/GPO4 (2)

Key 4 output / BCD output 4

and MOD_0 option resistor

General purpose output 4

and I²C address bit 2

option resistor

Option

resistor

OPT5/KOUT5/GPO5 (2)

Key 5 output and

MOD_1 option resistor

General purpose output 5

Open or

option

resistor

OPT6/KOUT6/IRQ (2)

O/OD

Key 6 output and

OM_0 option resistor

Interrupt line (active low)

Open or

option

resistor

4KOUT7/I2C_SDA(3)

TOD

Key 7 output

I2C serial data

Open

5KOUT8/I2C_SCL(3)

TOD

Key 8 output

I2C serial clock

Open

RESET

Reset (active low)

10nF

capacitor to

ground

Not Connected

8VDD_1

Supply voltage

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