RT9819

2

DS9819-05

August 2007

www.richtek.com

Function Block Diagram

Functional Pin Description

Pin Name

Pin Function

GND

Ground

RESET

Active Low Push-Pull Reset Output

RESET

Active High Push-Pull Reset Output

VDD

Power Pin

Timer

VSET

Threshold

Voltage Setting

POR

Power On Reset

CMP

N MOS

RESET/

RESET

VDD

VDD

P MOS

Pin Configurations

(TOP VIEW)

SOT-23-3 (L-Type)

2

3

1

RESET/

RESET

GND

VDD

2

3

1

RESET/

RESET

GND

VDD

SOT-23-3

SC-70-3

1

2

3

RESET/

RESET

GND

VDD

SC-82 (R-Type)

4

1

3

2

VDD

NC

GND

RESET/

RESET

SC-82

4

1

3

2

GND

NC

VDD

RESET/

RESET

Note : There is no pin1 indicator on top mark for SC-82 type, and pin 1 will be lower left pin when reading top mark from left to

right. Pin2 of SC-82 is wider than other pins.