VCC

Reset Comparator

22k

Low Line

Comparator

OPEN for LM3724

CONNECT for

LM3722/LM3723

+

-

Manual Reset

Comparator

Reset Logic and

One-Shot Timer

+

-

1.225V

Reference

MR

RESET/

RESET

GND

VCC

LM3722

LM3723

LM3724

1

2

3

4

5

MR

*(RESET)

RESET

GND

LM3722, LM3723, LM3724

SNVS154E – MAY 2001 – REVISED MARCH 2013

www.ti.com

Connection Diagram

*( ) are for LM3723

Figure 3. SOT-23-5

PIN DESCRIPTIONS

PIN

NAME

FUNCTION

1

GND

Ground reference

2

GND

Ground reference, device substrate, connect to ground.

RESET

Active-low output. RESET remains low while VCC is below the reset threshold voltage, and for 190

LM3722/LM3724

ms after VCC rises above the reset threshold voltage.

3

RESET

Active-high output. RESET remains high while VCC is below the reset threshold, and for 190 ms

LM3723

after VCC rises above the reset threshold.

Active-low input. Reset is asserted whenever this pin is pulled low and remains asserted for 190 ms

4

MR

after the MR pin goes high. May be left open.

5

VCC

Supply Voltage (+5V, +3.3V, or +2.5V, nominal)

Block Diagram

Figure 4. LM3722/LM3723/LM3724 Block Diagram

2

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