STM6321 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

STM6321

5-pin supervisor with watchdog timer and push-button reset

STMicroelectronics 

STM632x, STM682x

Description

1.1

1.1.1

1.1.2

1.1.3

1.1.4

1.1.5

Pin description

Active low, push-pull reset output (RST) - 6823/6824/6825

Pulses low when triggered, and stays low whenever VCC is below the reset threshold or

when MR is a logic low. It remains low for trec after either VCC rises above the reset

threshold, the watchdog triggers a reset, or MR goes from low to high.

Active low, open drain reset output (RST) - STM6321/6322/6822

Pulses low when triggered, and stays low whenever VCC is below the reset threshold or

when MR is a logic low. It remains low for trec after either VCC rises above the reset

threshold, the watchdog triggers a reset, or MR goes from low to high. Connect a pull-up

resistor to supply voltage.

Push-button reset input (MR)

A logic low on MR asserts the reset output. Reset remains asserted as long as MR is low

and for trec after MR returns high. This active low input has an internal 52 kΩ pull-up. It can

be driven from a TTL or CMOS logic line, or shorted to ground with a switch. Leave open if

unused.

Watchdog input (WDI)

If WDI remains high or low for at least 1.6 s, the internal watchdog timer expires and reset is

asserted. The internal watchdog timer clears while reset is asserted or when WDI sees

a rising or falling edge. The watchdog function CAN be disabled if WDI is left unconnected

or is connected to a tristate buffer output.

Active high reset output (RST)

Active high, push-pull reset output; inverse of RST.

STM6822

STM6823

1

3

4

—

5

2

Table 3. Pin function

Pin

STM6821

STM6321

STM6824

STM6322

STM6825

Name

—

1

1

RST

3

—

4

MR

4

4

—

WDI

1

3

3

RST

5

5

5

VCC

2

2

2

VSS

Function

Active low reset output

Push-button reset input

Watchdog Input

Active high reset output

Supply voltage

Ground

DocID11110 Rev 13

7/31

30

Share Link: