MAX6826 Просмотр технического описания (PDF) - Maxim Integrated

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MAX6826

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer

Maxim Integrated 

MAX6826-MAX6831

Dual Ultra-Low-Voltage SOT23 µP Supervisors with

Manual Reset and Watchdog Timer

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

VOLTAGE OUTPUT LOW vs. ISINK

0.350

VCC = +2.9V

0.300

0.250

0.200

0.150

0.010

0.005

0

01234567

ISINK (mA)

VOLTAGE OUTPUT HIGH vs. ISOURCE

2.92

VCC = +2.9V

2.90

2.88

2.86

2.84

2.82

2.80

2.78

2.76

2.74

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

ISOURCE (mA)

Pin Description

PIN

MAX MAX MAX MAX MAX MAX

6826 6827 6828 6829 6830 6831

NAME

FUNCTION

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

to low when VCC1, VCC2, or RESET IN input drops below the selected reset

1

1

1

1 RESET threshold, MR is pulled low, or the watchdog triggers a reset. RESET remains

low for the reset timeout period after all voltages exceed the device reset

threshold, MR goes low to high, or the watchdog triggers a reset.

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

VCC1, VCC2, or RESET IN input drops below the selected reset threshold, MR

1

1

RESET is pulled low, or the watchdog triggers a reset. RESET remains HIGH for the

reset timeout period after all voltages exceed the device reset threshold, MR

goes low to high, or the watchdog triggers a reset.

2

2

2

2

2

2 GND Ground

Manual-Reset Input, Active-Low, Internal 50kW pullup to VCC. Pull low to force a

3

3

3

3

3

3

MR reset. Reset remains active as long as MR is low and for the reset timeout period

after MR goes high. Leave unconnected or connect to VCC, if unused.

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

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

4

4

4

4

4

4

WDI

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

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

unconnected or is connected to a three-stated buffer output, the watchdog feature

is disabled.

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