MAX6862UK225(2004) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX6862UK225
(Rev.:2004)

Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer

Maxim Integrated 

Nanopower µP Supervisory Circuits with

Manual Reset and Watchdog Timer

PIN

MAX6864/

MAX6866

MAX6865

1

—

2

2

3

3

4

4

5

5

—

1

MAX6864/MAX6865/MAX6866 Pin Description

NAME

FUNCTION

RESET

GND

MR

WDI

VCC

RESET

Active-Low Open-Drain or Push-Pull Reset Output. RESET transitions from high to

low when VCC drops below the selected reset threshold, MR is pulled low, or the

watchdog timer expires. RESET remains low for the reset timeout period after

VCC exceeds the device reset threshold, MR deasserts, or after the watchog

timer expires. Push-pull RESET outputs are referenced to VCC. Open-drain

RESET outputs require an external pullup resistor.

Ground

Active-Low Manual Reset Input. Drive MR low to initiate a reset. The reset output

remains asserted while MR is held low and for the reset timeout period after MR

transitions high. Leave MR unconnected or connect to VCC if unused. MR is

internally pulled up to VCC through 10kΩ.

Watchdog Input. If WDI remains high or low for longer than the watchdog timeout

period, the internal watchdog timer expires, and a reset is triggered for the reset

timeout period. The internal watchdog timer clears whenever reset is asserted,

the manual reset is asserted, or WDI sees a rising or falling edge.

Supply Voltage. Input for VCC reset monitor. For noisy systems, bypass VCC with

a 0.1µF capacitor to GND.

Active-High Push-Pull Reset Output. RESET transitions from low to high when

VCC drops below the selected reset threshold, MR is pulled low, or the watchdog

timer expires. RESET remains high for the reset timeout period after VCC exceeds

the device reset threshold, MR deasserts, or after the watchdog timer expires.

RESET is referenced to VCC.

8 _______________________________________________________________________________________

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