STM817L(2006) 查看數據表（PDF） - STMicroelectronics

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STM817L
(Rev.:2006)

5V Supervisor with Battery Switchover

STMicroelectronics 

STM690A, STM692A, STM703

STM704, STM802, STM805, STM817/8/9

5V Supervisor with Battery Switchover

FEATURES SUMMARY

■ 5V OPERATING VOLTAGE

■ NVRAM SUPERVISOR FOR EXTERNAL

LPSRAM

■ CHIP-ENABLE GATING (STM818 only) FOR

EXTERNAL LPSRAM (7ns max PROP

DELAY)

■ RST AND RST OUTPUTS

■ 200ms (TYP) trec

■ WATCHDOG TIMER - 1.6sec (TYP)

■ AUTOMATIC BATTERY SWITCHOVER

■ LOW BATTERY SUPPLY CURRENT - 0.4µA

(TYP)

■ POWER-FAIL COMPARATOR (PFI/PFO)

■ LOW SUPPLY CURRENT - 40µA (TYP)

■ GUARANTEED RST (RST) ASSERTION

DOWN TO VCC = 1.0V

■ OPERATING TEMPERATURE:

–40°C to 85°C (Industrial Grade)

■ RoHS COMPLIANCE

Lead-free components are compliant with the

RoHS Directive.

Figure 1. Packages

8

1

SO8 (M)

TSSOP8 3x3 (DS)*

Table 1. Device Options

Watchdog

Input

Active-

Low

RST(1)

Active-

High

RST(1)

STM690A

✔

✔

STM692A

✔

✔

STM703

✔

STM704

✔

STM802L/M

✔

✔

STM805L

✔

✔

STM817L/M

✔

✔

STM818L/M

✔

✔

STM819L/M

✔

Note: 1. All RST and RST outputs are push-pull.

Manual

Reset

Input

✔

✔

✔

Battery

Switch-

over

✔

✔

✔

✔

✔

✔

✔

✔

✔

Power-fail

Comparator

✔

✔

✔

✔

✔

✔

✔

✔

Chip-

Enable

Gating

✔

Battery

Freshness

Seal

✔

✔

✔

* Contact local ST sales office for availability.

January 2006

Rev 7.0

1/37

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