LB1868M

No.6203-3/5

Pin Assignment

1

IN−

2

IN+

3

CT

4

ST

5

OUT1 6

7

GND

14

13

12

11

10

9

VIN

RD

Z2

Z1

OUT2

8 NC

Top view

BC

FG

Pin Function

Pin No.

Pin name

Function

1

IN−

Hall input + pin. Hysteresis amplifier

2

IN+

Hall input

− pin. Hysteresis amplifier

3

CT

Lockup protection time setting capacitor pin (0.47 to 4.7

µF).

4

ST

Start/stop pin.

5

BC

Output transistor common base pin.

6

OUT1

Output 1 pin.

9

OUT2

Output 2 pin.

7

GND

GND pin.

10

Z1

External Zener diode pin (external Zener diode to be connected between power supply and Z1).

11

Z2

Kickback absorption voltage alteration pin (shorted to Z1: 12V operation).

12

FG

Rotation frequency detector pin.

13

RD

Lockup detection pin (latch type).

14

VIN

Regulated power supply input pin (limiting resistor to be inserted between power supply and VIN).

Truth Table

ST

IN+

IN−

CT

OUT1

OUT2

RD

FG

H

L

L

H

H

L

L

H

L

H

L

H

H

L

H

H

L

L

H

L

L

L

L

H

L

L

H

L

H

H

L

H

H

H

H

L

L

or

OPEN

L

H

H

H

H

H

H

* RD is a latch type output