STM690A datasheet(6/43 Pages) STMICROELECTRONICS

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Description

STM690A/692A/703/704/802/805/817/818/819

6/43

Doc ID 10522 Rev 10

Description

The STM690A/692A/703/704/802/805/817/818/819 supervisors are self-contained devices

which provide microprocessor supervisory functions with the ability to non-volatize and

write-protect external LPSRAM. 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 STM703/704/819) as well as a power-fail comparator (except for STM818)

to provide the system with an early warning of impending power failure.

These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin

TSSOP package.

Figure 1.

Logic diagram (STM690A/692/802/805/817)

1. For STM805, reset output is active-high.

Figure 2.

Logic diagram (STM703/704/819)

AI07894

VCC VBAT

STM690A/

692A/802/

805/817

VSS

VOUT

RST(RST)(1)

WDI

PFI

PFO

AI07895

VCC VBAT

STM703/

704/819

VSS

VOUT

RST

PFI

PFO

STM690A 데이터시트(PDF) 6 Page - STMicroelectronics