LTC693_15 datasheet(8/20 Pages) LINER

部品番号	LTC693

部品情報	Microprocessor Supervisory Circuits

PDF	20 Pages

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メーカー	LINER [Linear Technology]

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LTC692/LTC693

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BLOCK DIAGRAM

PIN FUNCTIONS

WDI: Watchdog Input. WDI is a three level input. Driving

WDI either high or low for longer than the watchdog timeout

period, forces both RESET and WDO low. Floating WDI

disables the watchdog timer. The timer resets itself with

each transition of the watchdog input (see Figure 11).

WDO: Watchdog Logic Output. When the watchdog input

remains either high or low for longer than the watchdog

timeout period, WDO goes low. WDO is set high whenever

there is a transition on the WDI pin, or LOW LINE goes

low. The watchdog timer can be disabled by ﬂoating WDI

(see Figure 11).

CHARGE

PUMP

VBATT

VCC

CE IN

PFI

OSC IN

OSC SEL

WDI

RESET PULSE

GENERATOR

WATCHDOG

TIMER

RESET

BATT ON

VOUT

1.3V

GND

OSC

TRANSITION

DETECTOR

WDO

RESET

PFO

LOW LINE

CE OUT

LTC692/3 • BD

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