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SM8761AAS датащи(PDF) 1 Page - Nippon Precision Circuits Inc

номер детали SM8761AAS
подробное описание детали  Spread Spectrum Clock Generator
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производитель  NPC [Nippon Precision Circuits Inc]
домашняя страница  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8761AAS датащи(HTML) 1 Page - Nippon Precision Circuits Inc

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SM8761 series
NIPPON PRECISION CIRCUITS INC.—1
Spread Spectrum Clock Generator
OVERVIEW
The SM8761 series are compact clock generator ICs that have a spread spectrum (SS) function to reduce unde-
sirable EMI radiation. They have a built-in crystal oscillator circuit, PLL, and loop filter. They accept an input
clock signal, generated using an external crystal or direct external clock input, and output an SS-modulated
clock signal. In addition, versions are available for center spread and down spread modulation mode, and all
have a mode control pin to select the SS modulation function.
FEATURES
I
Spread spectrum clock output to reduce EMI
I
Correspond to wide range of output frequency
I
Low jitter
I
Operating supply voltage: 3.3
± 0.3V
I
Multiplication: 1-time multiplication
I
Package: 8-pin SOP
PINOUT
(Top view)
APPLICATIONS
I
Printer (laser/inkjet)
I
Photocopiers, scanners
I
LCD/PDP displays
I
Projectors
I
Miscellaneous electronic equipment
PACKAGE DIMENSIONS
(Unit: mm)
ORDERING INFORMATION
SM8761AA
SM8761AB
Spectrum modulation mode
Down spread
Center spread
Spectrum modulation rate*1
– 1.0% to – 3.8%
± 0.75% to ± 2.25%
Input frequency
Crystal element connection
20MHz to 40MHz
12MHz to 32MHz
External input clock
20MHz to 108MHz
12MHz to 32MHz
Output frequency
20MHz to 108MHz
12MHz to 32MHz
Multiplication
1-time multiplication
1-time multiplication
Jitter (Cycle-to-Cycle)
200ps (typ) @33MHz
200ps (typ) @16MHz
120ps (typ) @75MHz
*1. The modulation rate that can be selected varies with the input frequency.
1
VDD
CLKOUT
TSTN
XTN
4
2
3
MSEL0
MSEL1
8
7
6
5
VSS
XT
Device
Package
SM8761AAS
8-pin SOP
SM8761ABS
5.2
± 0.3
0.4
± 0.1
0.15 + 0.1
− 0.05
0 to 10°
0.695typ
1.27
0.12 M
0.10


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