WAKE-UP TIMER IC

PIN-SELECTABLE WAKE-UP TIMER IC

S-35720 Series

5



Pin Functions

1. SET0, SET1 (Input for interrupt time setting) pins

These pins input the interrupt time setting signal. After the RST

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pin changes from "L" to "H", the S-35720 Series

takes the values set to the SET0 pin and the SET1 pin. As a result, even if the SET0 pin and the SET1 pin settings are

changed during timer count-up action, the interrupt time does not change.

4 types of interrupt time can be selected depending on the SET0 pin and the SET1 pin settings.

2. RST

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(Input for reset signal) pin

This pin inputs the reset signal. The timer is reset when inputting "L" to the RST

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pin, and the timer starts the

operation when inputting "H". The RST

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pin has a built-in chattering elimination circuit. Regarding the chattering

elimination circuit, refer to " Chattering Elimination of RST

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Pin".

Besides, S-35720C01I and S-35720C02I are the products with pull-up resistor.

3. INT (Output for interrupt signal) pin

This pin outputs an interrupt signal. The interrupt signal is output when the time set to the SET0 pin and the SET1 pin

comes. The interrupt signal output (time-out type) is one-shot loop time-out. Regarding the operation of the interrupt

signal output, refer to " INT Pin Interrupt Signal Output".

Besides, S-35720C01I is the Nch open-drain output product, and S-35720C02I is the CMOS output product.

4. XIN, XOUT (Connection for quartz crystal) pins

Connect a quartz crystal between the XIN pin and the XOUT pin.

5. VDD (Positive power supply) pin

Connect this pin with a positive power supply.

Regarding the values of voltage to be supplied, refer to " Recommended Operation Conditions".

6. VSS pin

Connect this pin to GND.