STM6321LWY6E(2004) Просмотр технического описания (PDF) - STMicroelectronics

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STM6321LWY6E
(Rev.:2004)

5-Pin Supervisor with Watchdog Timer and Push-button Reset

STMicroelectronics 

STM6321/6322/6821/6822/6823/6824/6825

SUMMARY DESCRIPTION

The STM6xxx Supervisors are self-contained de-

vices which provide microprocessor supervisory

functions. A precision voltage reference and com-

parator monitors the VCC input for an out-of-toler-

ance 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 2. Logic Diagram (STM6821/6822/6823)

VCC

WDI

MR

STM6XXX

RST (RST)(1)

VSS

AI09128

Note: 1. For STM6821 only.

Figure 3. Logic Diagram (STM6321/6322/6824/

6825)

VCC

(WDI)(1) MR

STM6XXX

RST

RST

VSS

Note: 1. For STM6321/6824

AI09129

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

Figure 4. STM6821/6822/6823 SOT23-5

Connections

RST(1)(RST)(2)

VSS

MR

SOT23-5

1

5

2

3

4

VCC

WDI

AI09130

Note: 1. Push-pull only.

2. Open Drain for STM6822.

Figure 5. STM6321/6322/6824/6825 SOT23-5

Connections

RST(1)

VSS

RST(2)

SOT23-5

1

5

2

3

4

VCC

MR (WDI)(3)

AI09131

Note: 1. Open Drain for STM6321/6322.

2. Push-pull only.

3. For STM6321/6824

4/21

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