MAX6701 데이터 시트보기 (PDF) - Maxim Integrated

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MAX6701

Low-Voltage, SOT23 µP Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer

Maxim Integrated 

Low-Voltage, SOT23 µP Supervisors with Power-

Fail In/Out, Manual Reset, and Watchdog Timer

PIN

MAX6701(A)

MAX6705(A)

MAX6702(A) MAX6704 MAX6706(A) MAX6708

MAX6703(A)

MAX6707(A)

NAME

1

1

1

1

MR

2

2

3

3

—

4

—

5

2

2

VCC

3

3

GND

4

4

PFI

5

5

PFO

6

6

6

—

WDI

—

—

7

7

—

6

N.C.

7

7

RESET

Pin Description

FUNCTION

Active-Low, Manual Reset Input, Internal 50kΩ Pullup to VCC.

Pull low to force a reset. Reset remains active as long as MR is

low and the reset timeout period after MR goes high. Leave

unconnected or connect to VCC if unused. WDO deasserts

when MR is low (MAX6701(A)/MAX6702(A)/MAX6703(A)/

MAX6705(A)/ MAX6706(A)/MAX6707(A) only).

Supply Voltage for MAX6701–MAX6708 and Input for Primary

Reset Threshold Monitor. Push-pull outputs are powered by VCC.

Ground

Power-Fail Voltage Monitor Input. High-impedance input for

internal power-fail comparator. Connect this pin to an external

resistive-divider network to set the reset threshold voltage;

0.62V (typ) threshold. Connect to GND or VCC when not used.

Power-Fail Monitor Output. Open drain or push-pull active low.

PFO goes low when PFI is less than 0.62V.

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

watchdog timeout period, the internal watchdog timer runs out and

WDO is asserted. WDO is asserted low after each watchdog

overflow and remains low until the watchdog timer is cleared (the

reset output is not affected). The internal watchdog timer clears

whenever a VCC/RST_IN1/RST_IN2 reset is asserted, the manual

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

watchdog timer remains cleared until the reset output is

deasserted. On the MAX6704, RESET pulse asserts for the reset

timeout period after each watchdog timeout overflow. The

watchdog timer cannot be disabled.

No Connection. Not internally connected.

Active-Low Reset Output (Open Drain or Push-Pull). RESET

changes from high to low when the VCC input drops below the

selected reset threshold (or RST_IN1/ RST_IN2 for the

MAX6701(A)/MAX6702(A)/MAX6703(A), MR is pulled low, or the

watchdog triggers a reset (MAX6704 only). RESET remains low for

the reset timeout period after the reset conditions are terminated.

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