LB1872 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LB1872

Polygon Mirror Scanner Driver IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No. Symbol

LB1872

Pin function

Phase lock detector output

20

LD This pin goes to the on state when the PLL phase is locked. This is an

open collector output.

Divisor switch

Low: 0 to 1.0 V

21

N2 Middle: 2.0 to 3.0 V

High: 4.0 V to VREG

This pin goes to the middle level when open.

Divisor switch and external clock input

Low: 0 to 1.5 V

22

N1

High: 3.5 V to VREG

This pin functions as the external clock input pin when N2 is at the

middle level.

This pin goes to the high level when open.

Start/stop control

Low: Start

23

S/S

High: Stop

This pin goes to the high level when open.

FG pulse-converted output

24

FGS This pin outputs the post-hysteresis comparator FG signal.

This is an open collector output.

Equivalent circuit

FG amplifier output

25

FGOUT If noise in the FG signal is a problem, e.g. if discharge noise is

detected, insert a capacitor (about 0.01 to 0.1 µF) between this pin and

ground.

FG schmitt comparator

Continued on next page.

No. 5625-8/11

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