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SM8760CA Datasheet(PDF) 4 Page - Nippon Precision Circuits Inc

Part No. SM8760CA
Description  Spread Spectrum Clock Generator
Download  8 Pages
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Maker  NPC [Nippon Precision Circuits Inc]
Homepage  http://www.npc.co.jp/en
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SM8760CA Datasheet(HTML) 4 Page - Nippon Precision Circuits Inc

   
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SM8760CA
SEIKO NPC CORPORATION —4
AC Characteristics
VDD = 3.3 ± 0.3V, VSS = 0V, Ta = −20 to +80°C unless otherwise noted.
Parameter
Symbol
Pins
Condition
Rating
Unit
min
typ
max
Clock frequency
fin
XT
Crystal connection
12.75
MHz
External clock input*1
*1. When using an external clock input, it is recommended that the clock on XT have 50% duty and VDD level signal amplitude. Note that the input signal
voltage must not exceed the absolute maximum rating, otherwise it may cause the device to breakdown.
12.75
Output clock rise time*2
*2. Measured using the circuit in Figure 1 on the NPC standard evaluation board.
tr
CLKOUT,
REFOUT
CL = 15pF, VOL = 0.2VDD to VOH =
0.8VDD transition time
2.0
ns
Output clock fall time*2
tf
CLKOUT,
REFOUT
CL = 15pF, VOH = 0.8VDD to VOL =
0.2VDD transition time
2.0
ns
Output clock jitter*2
tjitter
REFOUT
1-sigma jitter, Ta = 25
°C, CL = 15pF,
VO = 0.5VDD
–25–
ps
Peak-to-peak jitter, Ta = 25
°C,
CL = 15pF, VO = 0.5VDD
180
CLKOUT
Cycle-to-cycle jitter, Ta = 25
°C,
CL = 15pF, VO = 0.5VDD
350
Output clock duty
cycle*2
Dt
CLKOUT,
REFOUT
Ta = 25
°C, CL = 15pF, VO = 0.5VDD
45
50
55
%
Power-up time*2,*3
*3. The power-up time is the time from when the supply reaches 3.0V after the supply is turned ON until each output clock reaches its designated fre-
quency to within ± 0.1%.
tp
CLKOUT,
REFOUT
–15
ms
Figure 1. Measurement circuit
Frequency &
Time Interval
Analyzer
(HP5371A)
X'tal
Oscilloscope
(Infinium
HP54845A)
Passive Probe
(HP10435A)
Active Probe
(HP1152A)
DUT
Jitter
Measurement
System
(ASA, M1)
+
+
DUT: Device Under Testing


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