STM1810 datasheet(7/25 Pages) STMICROELECTRONICS

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STM1810/1811/1812/1813/1815/1816/1817/1818

Description

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1.1

Functional block diagrams

Figure 5.

Push-pull active-low output (STM1810/1812/1815/1817)

RST for STM1812 and STM1817.

Figure 6.

Open drain, active-low output (STM1811/1816)

5.5 k

Ω internal pull-up resistor.

Figure 7.

Open drain, active-low output (bidirectional, manual reset detect,

STM1813/1818)

5.5 k

Ω internal pull-up resistor.

1.2

Pin descriptions

See Figure 2 and Table 2 for a brief overview of the signals connected to this device.

1.2.1

Active-low RST output (push-pull)

Pulses low when VCC drops below VRST, and stays low as long as VCC is below the reset

threshold. It remains low for trec after VCC rises above the reset threshold.

1.2.2

Active-low RST output (open drain)

Pulses low when VCC drops below VRST, and stays low as long as VCC is below the reset

threshold. It remains low for trec after VCC rises above the reset threshold. RST output has

an internal 5.5 k

Ω pull-up resistor.

AI09651a

COMPARE

VRST

VCC

trec

Generator

RST

(1)

AI09672

COMPARE

VRST

VCC

trec

Generator

RST

5.5 k

Ω(1)

AI09673

COMPARE

Push-button

Detect

VRST

VCC

trec

Generator

RST

5.5 k

Ω(1)

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