SM8761 Datasheet, PDF (2/11 Pages) Nippon Precision Circuits Inc – Spread Spectrum Clock Generator

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