STM6821ZAWY6E(2007) 데이터 시트보기 (PDF) - STMicroelectronics

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STM6821ZAWY6E
(Rev.:2007)

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

STMicroelectronics 

STM6321/6322STM6821/6822/6823/6824/6825

1

Summary description

Summary description

The STM6xxx Supervisors are self-contained devices which provide microprocessor

supervisory functions. A precision voltage reference and comparator monitors the VCC input

for an out-of-tolerance condition. When an invalid VCC condition occurs, the reset output

(RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer

(except for STM6322/6825) and/or a push-button (MR) reset input.

These devices are available in a standard 5-pin SOT23 package.

Figure 1. Logic diagram (STM6821/6822/6823)

VCC

WDI

MR

STM6XXX

RST (RST)(1)

VSS

AI09128

1. For STM6821 only.

Figure 2. Logic diagram (STM6321/6322/6824/6825)

VCC

(WDI)(1) MR

STM6XXX

RST

RST

VSS

1. For STM6321/6824.

Table 2. Signal names

MR

Push-button Reset Input

WDI

Watchdog Input

RST

Active-low Reset Output

RST

Active-high Reset Output

VCC

Supply voltage

VSS

Ground

AI09129

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