Ultra-Low-Voltage SC70 Voltage Detectors

and µP Reset Circuits

_______________________________________________________________________________________

5

Pin Description—MAX6832–MAX6837

PIN

MAX6833

SC70-3

MAX6832/

MAX6834

SC70-3

MAX6836

SC70-4

MAX6835/

MAX6837

SC70-4

NAME

FUNCTION

1

1

1

1

GND

Ground

—

2

—

2

RESET

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

selected reset threshold or MR is pulled low. RESET remains

reset threshold and MR is released high.

2

—

2

—

RESET

Reset Output, Push-Pull, Active-High. RESET changes from

reset threshold or MR is pulled low. RESET remains HIGH for

threshold and MR is released high.

——

33

MR

Active-Low Manual Reset Input. Internal 20k

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

LOW and for the reset timeout period after MR goes HIGH.

33

4

4

Supply Voltage and Monitored Supply

Pin Description—MAX6838/MAX6839/MAX6840

PIN

MAX6839

SC70-4

MAX6838/

MAX6840

SC70-4

NAME

FUNCTION

1

1

RESET-IN

Adjustable Reset Threshold Input. High-impedance input for reset comparator. Connect

this pin to an external resistive-divider network to set the reset threshold voltage; the

is not monitored).

22

Supply Voltage (1.1V to 3.3V)

3

3

GND

Ground

4

—

RESET

Reset Output, Push-Pull, Active-High. RESET changes from LOW to HIGH when the

RESET-IN input drops below the typical reset threshold (444mV). RESET remains HIGH for

the reset timeout period after RESET-IN exceeds the reset threshold.

—

4

RESET

Reset Output, Open-Drain or Push-Pull, Active-Low. RESET changes from HIGH to LOW

when RESET-IN drops below the typical reset threshold (444mV). RESET remains LOW for

the reset timeout period after RESET-IN exceeds the reset threshold.