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SM8720AV 数据表(PDF) 1 Page - Nippon Precision Circuits Inc

部件名 SM8720AV
功能描述  3-PLL Multi-Output Clock Generator
Download  6 Pages
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制造商  NPC [Nippon Precision Circuits Inc]
网页  http://www.npc.co.jp/en
标志 NPC - Nippon Precision Circuits Inc

SM8720AV 数据表(HTML) 1 Page - Nippon Precision Circuits Inc

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SM8720AV
NIPPON PRECISION CIRCUITS INC.—1
3-PLL Multi-Output Clock Generator
OVERVIEW
The SM8720AV is a clock generator IC with 3 built-in PLLs. It can simultaneously output a 27MHz master
clock and three other clocks with different frequency (CLK1OUT, CLK2OUT, CLK3OUT) derived from the
master clock. The 3 generated clocks can be independently turned ON/OFF using control pins and the fre-
quency of CLK3OUT can be switched, allowing unneeded clocks within a system to be switched OFF thereby
reducing current consumption. The master clock, supplied by high-stability crystal oscillator external input,
allows clocks to be generated with high precision and low jitter and which require no frequency adjustment,
making the SM8720AV ideal for digital still cameras and other applications which require multiple high-preci-
sion clocks.
FEATURES
I
2.7 to 3.3V supply voltage
I
21mA typ. current consumption
(VDD = 3.0V, all outputs with no load)
I
27MHz master clock (external input)
(internal PLL reference clock)
I
Generated clocks
• 27MHz master clock (REFOUT)
• 22.5792MHz (CLK1OUT)
(ON/OFF switching using control pin)
• 48.0000MHz (CLK2OUT)
(ON/OFF switching using control pin)
• 36/45/48.6MHz (CLK3OUT)
(ON/OFF switching using control pin, fre-
quency switching)
I
Output load
• 25pF (REFOUT)
• 15pF (all outputs excluding REFOUT)
I
Low jitter output
• 140ps typ. peak-to-peak (REFOUT)
• 220ps typ. peak-to-peak
(CLK1OUT, CLK3OUT)
• 220ps typ. peak-to-peak (CLK2OUT)
I
16-pin VSOP package (Pb free)
APPLICATIONS
I
Digital still cameras
ORDERING INFORMATION
PINOUT
(Top view)
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.07g
Device
Package
SM8720AV
16-pin VSOP
VDD1 1
FIN 2
VSS1 3
CLK3OUT 4
16
15
14
13
REFOUT
VSS3
SEL2
CLK2_ON
CLK3_ON 5
SEL1 6
CLK1_ON 7
VDD2 8
12
VDD3
11
CLK2OUT
10
VSS2
9
CLK1OUT
5.1 0.2
0.5 0.2
0.275typ
0.65
0.10
0.12 M
0.15
+ 0.1
- 0.05
0.22
+ 0.1
- 0.05
0 to 10


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