SM8761 데이터 시트보기 (PDF) - Nippon Precision Circuits

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SM8761

Spread Spectrum Clock Generator

Nippon Precision Circuits  

BLOCK DIAGRAM

SM8761 series

VDD

VSS

XT

XTN

X'tal

OSC

Phase Detector

R Counter

&

LPF

Charge Pump

(PLL)

N Counter

VCO

Post

Divider

SS Control

SS Control

Mode, R/N Counter setting,

Divider setting, etc.

Control Logic

CLKOUT

MSEL0 MSEL1 TSTN

PIN DESCRIPTION

Number

Name

1

XT

2

VDD

3

VSS

4

CLKOUT

5

TSTN

6

MSEL0

7

MSEL1

8

XTN

*1. Built-in pull-up resistor

I/O *1

Function

I

Crystal oscillator element connection or external clock input

PWR Supply voltage

GND Ground

O

SS clock output

Ip

Test (Tie HIGH or leave open circuit)

I

SS modulation rate setting

I

SS modulation rate setting

O

Crystal oscillator element connection

NIPPON PRECISION CIRCUITS INC.—2

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